2008 Nissan Sentra Stumbles At 3000 RPM - Automotive Repairs - Page 10 - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Do It Yourself > Automotive Repairs

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree227Likes
Reply
 
Thread Tools
Display Modes
Old 09-27-2019, 10:55 PM   #136
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Great gobs of goose grease, I did find out how to get the fuel injectors out and man what a j o b. 6 hours and I am wore out. I found out there is a cowl covering the windshield wiper motor that comes off. But first you have to take the plastic seal that is on top of it. To get that off, the windshield wiper arms have to come off and the washer tube disconnected. And that was so I could get behind the intake to take it off.

A bunch of hoses and electrical connectors unhooked. The top motor mount and adapter that goes between the mount and the engine. For some reason, who ever worked on this engine last put spacers under the motor mount to body, then had to put spacers between the motor and where the mount bolts to the motor.

That is crazy, why not just leave all the spacers out and put it back like it was originally. I guess I will see when I put it back together why they did that.

I had to pull the intake, than a bracket that went under the intake. Pulled the fuel rail. Unhooked the injectors and pulled them out. That was not a fun job, and putting it back together is going to be really harder.

I did find that this is not direct fuel injected. It is indirect injected which I am sooooooo glad. Direct injectors spray fuel straight into the cylinders. The down side to that is carbon builds up on top of your valves, if you don't install an oil catch can between the PVC valve and the intake manifold.

Since this is indirect injected, the gas sprays on top of the intake valves and keeps the carbon from building up. That makes me a happy camper. The direct injected injectors are exposed to all the exploded gases inside the cylinder and crap builds up on them much faster than indirect injectors. Oh well, tomorrow I will clean and check these injectors to see if I put them back or not. I sure don't want to go through all this again. lol

Oh by the way, I called for the price of the intake gasket today, $50.00. I told them nope, I can get that gasket from Rockauto for $18.42. Man, I can see making a profit but for crying out loud. Before I told him it was the same brand name gasket, he said "you get what you pay for" I said, sometimes not.

Man I hope this is the problem with the stumbling, this is getting old.
raylo32 and de-nagorg like this.
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim

Last edited by BigJim; 09-27-2019 at 11:04 PM.
BigJim is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-28-2019, 10:28 AM   #137
Member
 
Bigplanz's Avatar
 
Join Date: Apr 2009
Location: Louisville KY
Posts: 1,732
Rewards Points: 2,624
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Quote:
Originally Posted by BigJim View Post
Great gobs of goose grease, I did find out how to get the fuel injectors out and man what a j o b. 6 hours and I am wore out. I found out there is a cowl covering the windshield wiper motor that comes off. But first you have to take the plastic seal that is on top of it. To get that off, the windshield wiper arms have to come off and the washer tube disconnected. And that was so I could get behind the intake to take it off.

A bunch of hoses and electrical connectors unhooked. The top motor mount and adapter that goes between the mount and the engine. For some reason, who ever worked on this engine last put spacers under the motor mount to body, then had to put spacers between the motor and where the mount bolts to the motor.

That is crazy, why not just leave all the spacers out and put it back like it was originally. I guess I will see when I put it back together why they did that.

I had to pull the intake, than a bracket that went under the intake. Pulled the fuel rail. Unhooked the injectors and pulled them out. That was not a fun job, and putting it back together is going to be really harder.

I did find that this is not direct fuel injected. It is indirect injected which I am sooooooo glad. Direct injectors spray fuel straight into the cylinders. The down side to that is carbon builds up on top of your valves, if you don't install an oil catch can between the PVC valve and the intake manifold.

Since this is indirect injected, the gas sprays on top of the intake valves and keeps the carbon from building up. That makes me a happy camper. The direct injected injectors are exposed to all the exploded gases inside the cylinder and crap builds up on them much faster than indirect injectors. Oh well, tomorrow I will clean and check these injectors to see if I put them back or not. I sure don't want to go through all this again. lol

Oh by the way, I called for the price of the intake gasket today, $50.00. I told them nope, I can get that gasket from Rockauto for $18.42. Man, I can see making a profit but for crying out loud. Before I told him it was the same brand name gasket, he said "you get what you pay for" I said, sometimes not.

Man I hope this is the problem with the stumbling, this is getting old.
Should of told him the Rockauto part is the same as his, and "if you shop around, it can keep you from being ripped off."

Or, even better, show him the exact same online part as his and ask him if he will price match. Eff that guy.
raylo32 and de-nagorg like this.
__________________
"The first time you do a repair on your car, it takes 4 hours, minimum. The second time, 1/2 an hour. There never is a second time, though."

Last edited by Bigplanz; 09-28-2019 at 10:30 AM.
Bigplanz is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-28-2019, 12:54 PM   #138
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Quote:
Originally Posted by Bigplanz View Post
Should of told him the Rockauto part is the same as his, and "if you shop around, it can keep you from being ripped off."

Or, even better, show him the exact same online part as his and ask him if he will price match. Eff that guy.
I did go down there and showed him a photo on my phone and he said he could come down to $39.99 and that was with my vet discount. One other time he did match the rockauto price on an 02 sensor. His price was $224.99, Rockauto $69.79 same Denso 02 sensor. He did come down to the price for the sensor and shipping. That just tells me they have one heck of a mark up. Someone is making a killing.

I will say this though, some of Rockauto parts are not very good. I would not trust a ball joint that costs $3. Some of their prices are just way way too cheap and that does bother me. But brand names like Bosch, NGK and others that are the same part, I will buy them from Rockauto, I can wait 4 or 5 days for that kind of money.

What blows me away is some of the more popular auto parts stores are even higher than these people are. Some auto part places here sell a qt of oil for $7, not the synthetic but regular 10W 30 oil. I can go down to Ace Hardware and get the same oil for $3. I could go on like $16.89 for one spark plug but I will just let it rest there.
de-nagorg likes this.
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-28-2019, 01:21 PM   #139
Member
 
raylo32's Avatar
 
Join Date: Nov 2006
Location: Maryland (DC 'burbs)
Posts: 2,098
Rewards Points: 1,264
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Something at Rock Auto must have changed. A couple weeks ago I worked up an order for some rear drum brake stuff for my truck, all in stock. Estimated delivery date was like 10 days out. I used to get stuff in a couple of days from them. Does RA now ship stuff via pony express or what? I didn't place the order since I was to be out of town in that time frame.
__________________
Live long and prosper.
raylo32 is online now   Reply With Quote
Old 09-28-2019, 02:14 PM   #140
Member
 
Bigplanz's Avatar
 
Join Date: Apr 2009
Location: Louisville KY
Posts: 1,732
Rewards Points: 2,624
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Buy the good stuff-motorcraft, denso, acdelco-from RA. Leave the "economy" section alone.

If I buy local, I go to NAPA.
BigJim and de-nagorg like this.
__________________
"The first time you do a repair on your car, it takes 4 hours, minimum. The second time, 1/2 an hour. There never is a second time, though."

Last edited by Bigplanz; 09-28-2019 at 02:17 PM.
Bigplanz is offline   Reply With Quote
Old 09-28-2019, 03:22 PM   #141
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Quote:
Originally Posted by raylo32 View Post
Something at Rock Auto must have changed. A couple weeks ago I worked up an order for some rear drum brake stuff for my truck, all in stock. Estimated delivery date was like 10 days out. I used to get stuff in a couple of days from them. Does RA now ship stuff via pony express or what? I didn't place the order since I was to be out of town in that time frame.
Ray, I have noticed they are slower on delivery now. They use to say it would be 4 days, then a couple days later it was here.
de-nagorg likes this.
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
Old 09-28-2019, 06:04 PM   #142
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 13,323
Rewards Points: 1,612
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


I often find OEM Ford parts on e-bay, at great prices.

I got a case of motorcraft oil filters for the same price that I was quoted at my local dealership for one.

I realized later that the sale was from a Louisiana place that had leftover inventory, that was supposedly damaged in Katrina, but my filters are perfect, no watermarks on any boxes.

So maybe they were selling them after receiving insurance payments, and were supposed to have scrapped them, I don't know, just that I am pleased to have scored a great deal on them.

As for steering parts, do be careful, that you get quality ones, I too do not trust the knockoff stuff sold too cheap.


ED
de-nagorg is online now   Reply With Quote
Old 09-28-2019, 09:52 PM   #143
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Oh my stars, I am bushed. I got the injectors cleaned today and installed new O rings. I got the cart before the horse putting the injectors back in. I got them, the fuel rail back on and the intake. I'll be a son of a gun if I didn't forget to put the blame clips on the top of the injectors. I got the two end ones on but the two middle ones were a no go.

I had to pull the intake, fuel rail and injectors back out just because of those two clips. Man I hate doing something over like that.

Another couple hours I will have it all back together...so that means 4 or 5 more hours. lol If this isn't what the problem is, that muffler is coming off and I will just replace it. I can not think of anything else other than the knock sensor. If it is the knock sensor I will mount it on the firewall and ground that thing so it won't pick up any more noise if that is the problem. This just don't want to end.
de-nagorg likes this.
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
Old 09-30-2019, 11:09 PM   #144
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Well I was right it was more like 6 hours to get it all back together. What slowed me down an awful lot was that blame top motor mount with the spacers everywhere. I bolted it back to the motor like it was supposed to be. What gave me fits was where it was bolted to the frame. It set 1/2 from the frame and if bolted down tight it would have broken the mount.

The holes where the bolts went were way too big (see photo below). I tried to find spacers that I could fit in the hole and take up the excess space. I did a little rigging and got it bolted in but it can sure be felt from the vibrations of the motor. I think some kind of rubber goes in there to cut down the vibration.

After all was said and done, I fired it up and it would not get past an idle. I rean a scan and found I forgot the plug in the throttle body. It runs great now. No stumbling but there is a slight power loss after it gets warm.

I am happy with the gas millage now, it is getting 20.9 mpg and specs say it supposed to get 21 city so I am happy. I will still go ahead and replace the muffler as it has a rusty spot on it and it is a matter of time before it is gone anyway.

I am one happy camper.

I am still going to put the oil catch can on this one to keep the blow by from getting sucked back into the engine. It is sucking oily sludgy stuff back into the intake so the catch can will solve that.

After I got half way through, our grandson told me they can clean the injectors while they are still in the car. The car runs off the cleaner and shuts off when the can is empty. If that works, that sure would have saved tons of time. Have any of you tried it?
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
Old 09-30-2019, 11:20 PM   #145
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 13,323
Rewards Points: 1,612
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


That is good news, the power loss after warmup, might be a slightly constricted exhaust, you said that you are replacing the muffler, good deal.

The dealership should have a schematic, for how the engine mount was built, I have said it before, but it bears repeating.

The dealership parts department can be your best friend in researching this kind of stuff.

As with everything in life if it is worth it to do it right, do it.

Do it right and be done with it, do it "half baked", and do it over and over.

I prefer once and done myself.


I forgot, as for cleaning injectors, I just add a bottle of cleaner to the fuel tank every 6000 miles or so, always seems to keep the crud out for me.

And that oily crud from the blow-by, is supposed to have a foam filter to stop the crud before it gets sucked back in, just clean the foam once in awhile.

ED

Last edited by de-nagorg; 09-30-2019 at 11:24 PM. Reason: Add extra.
de-nagorg is online now   Reply With Quote
Old 09-30-2019, 11:21 PM   #146
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


I forgot to post the photo of the mount to the frame, see how much larger the hole is that the bolt?
Attached Thumbnails
2008 Nissan Sentra Stumbles at 3000 RPM-motor-mount.jpg  
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
Old 09-30-2019, 11:33 PM   #147
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 13,323
Rewards Points: 1,612
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Quote:
Originally Posted by BigJim View Post
I forgot to post the photo of the mount to the frame, see how much larger the hole is that the bolt?
That's the wrong bolt.

Holes like that are supposed to have "shoulder bolts", in them.

The head of the bolt has a shoulder on it to be inserted into the larger hole in the mount to prevent the assembly from slipping around.

Again consult a dealership for the schematics, and get the proper bolts.


ED
de-nagorg is online now   Reply With Quote
Old 10-02-2019, 10:08 PM   #148
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Quote:
Originally Posted by de-nagorg View Post
That's the wrong bolt.

Holes like that are supposed to have "shoulder bolts", in them.

The head of the bolt has a shoulder on it to be inserted into the larger hole in the mount to prevent the assembly from slipping around.

Again consult a dealership for the schematics, and get the proper bolts.


ED
Ed I was thinking the other way around, I was thinking there was a spacer with a lip that fit in the hole and the bolt went through that. I just can't remember to look at the dealer parts blow up, thanks for the reminder.

Well today the little car started to stumble all over again, so back to square one. That muffler is coming off and a new one installed, if not that then the knock sensor if not that, I will drive the blame thing til the engine is toast.
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
The Following User Says Thank You to BigJim For This Useful Post:
de-nagorg (10-02-2019)
Old 10-02-2019, 11:47 PM   #149
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 13,149
Rewards Points: 612
Blog Entries: 1
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


I have looked for the last 1 3/4 hours trying to find something about the bolts and stuff with that mount, still haven't found anything. I give up, I'm going to bed.
de-nagorg and Nealtw like this.
__________________
New members: Please consider adding your location to your profile.

Lawyers believe a man is innocent until proven broke.

If you do what you've always done, you'll get what you've always got.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
Old 10-03-2019, 07:15 AM   #150
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 31,283
Rewards Points: 6,224
Default

Re: 2008 Nissan Sentra Stumbles at 3000 RPM


Quote:
Originally Posted by BigJim View Post
I forgot to post the photo of the mount to the frame, see how much larger the hole is that the bolt?
There seems to be an impression of where there was a washer or something.
I haven't been following, what part are we looking at?
Attached Images
 
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Top of Page | View New Posts