Another surging/hesitating problem unveiled
#1
Senior Member
Posts like a Turbo
Thread Starter
Join Date: Jul 2004
Posts: 226
Likes: 0
Received 0 Likes
on
0 Posts
Another surging/hesitating problem unveiled
I have had the infamous stubbling/surging problem like most folks have discussed here. All the popular culprits have been coil packs, wires, plugs, tranny issues, possible PCM problems.
May not be a huge discovery here but I'd like to shed some light on this. I bought my car with 87k. It now has a little over a 100k on her. Since day one I've had the slight hessitation and stumbling under light engine loads, and most noticeable in 3rd or 4th gear with the TC locked up. It'* not horrible now, but still annoying and has progressively gotten worse since day one. Anyways, after really thinking about it all, i realized what could possibly be causing this, at only light engine loads? What only operates during part throttle/cruise? EGR. So I unplugged the EGR'* stepper motor to see if it changed anything. And yes, my problem is now gone. I have a bad or dirty EGR valve. I also have a CE light now too . But, it appears to me, that even if the valve is dirty or working imporoperly, it might not set a code and the O2'* might not notice enough to set a code from the EGR'* faulty operation either. I think this is what happened in my case. ACtually, I have gotten a CE light once in while in the past month or so, after I had been driving with the surging going on for over a minute or so, then the light popped on. But this is only recently. I've had the hesitation and surging for a while with no CE light.
In conclusion I just thought I'd share what I found out. I was thinking possible coil packs too was my problem, but after discovering the EGR thing, I'm more certain I know the problem. Yeah, I'm polluting the environement more right now, but my car runs the best it'* ever run. Gotta check out the valve soon and see what'* up.
May not be a huge discovery here but I'd like to shed some light on this. I bought my car with 87k. It now has a little over a 100k on her. Since day one I've had the slight hessitation and stumbling under light engine loads, and most noticeable in 3rd or 4th gear with the TC locked up. It'* not horrible now, but still annoying and has progressively gotten worse since day one. Anyways, after really thinking about it all, i realized what could possibly be causing this, at only light engine loads? What only operates during part throttle/cruise? EGR. So I unplugged the EGR'* stepper motor to see if it changed anything. And yes, my problem is now gone. I have a bad or dirty EGR valve. I also have a CE light now too . But, it appears to me, that even if the valve is dirty or working imporoperly, it might not set a code and the O2'* might not notice enough to set a code from the EGR'* faulty operation either. I think this is what happened in my case. ACtually, I have gotten a CE light once in while in the past month or so, after I had been driving with the surging going on for over a minute or so, then the light popped on. But this is only recently. I've had the hesitation and surging for a while with no CE light.
In conclusion I just thought I'd share what I found out. I was thinking possible coil packs too was my problem, but after discovering the EGR thing, I'm more certain I know the problem. Yeah, I'm polluting the environement more right now, but my car runs the best it'* ever run. Gotta check out the valve soon and see what'* up.
#2
Senior Member
Posts like a Turbo
Thread Starter
Join Date: Jul 2004
Posts: 226
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by jr's3800
<--- wondering what the code is...
Once school starts back up next week, I'll bring her in and put the ole Tech II on it and check it out. But first and most importantly, I've got two 12" Soundstreams that need to go in my trunk this week...
#4
Senior Member
Posts like a 4 Banger
Join Date: Dec 2004
Location: Rochester, NY
Posts: 113
Likes: 0
Received 0 Likes
on
0 Posts
Only having had my '93 since X-mas, I'm not quite sure how to go about checking my EGR to see if it needs cleaning and/or replacing....Is it a difficult procedure?...And does the TB need to be taken off/apart to do it?
#5
Senior Member
True Car Nut
That'* very interesting DJ.
So it seems you were still having your surging problem during a cold winter in central New York? Mine has disappeared since I put in my Intense PCM, but I was thinking the surging might have quit because of the onset of winter here in Iowa. Your symptoms seem to indicate that your problem was still occurring, even with colder air. I'll have to see what happens to my car when springtime rolls around.
Thanks for posting that. It could help a lot of us figure out what'* wrong with our cars.
So it seems you were still having your surging problem during a cold winter in central New York? Mine has disappeared since I put in my Intense PCM, but I was thinking the surging might have quit because of the onset of winter here in Iowa. Your symptoms seem to indicate that your problem was still occurring, even with colder air. I'll have to see what happens to my car when springtime rolls around.
Thanks for posting that. It could help a lot of us figure out what'* wrong with our cars.
#6
Member
Posts like a V-Tak
Join Date: Jan 2005
Location: New Canaan, CT
Posts: 55
Likes: 0
Received 0 Likes
on
0 Posts
I had the same problem as well. Finally the check engine light came on and I brought the car to the dealership. It was the EGR valve. Here'* the link to my post.
http://www.bonnevilleclub.com/forum/...ic.php?t=29157
Leif W.
http://www.bonnevilleclub.com/forum/...ic.php?t=29157
Leif W.
#8
Senior Member
Certified Car Nut
Originally Posted by ukie eagle
Only having had my '93 since X-mas, I'm not quite sure how to go about checking my EGR to see if it needs cleaning and/or replacing....Is it a difficult procedure?...And does the TB need to be taken off/apart to do it?
see the thing right by the valve cover on the drivers side there is your EGR
Thread
Thread Starter
Forum
Replies
Last Post