EGR troubles
#1
EGR troubles
People,
1987 sunbird gt, non turbo. Orignal owner. EGR valve connected to vacuum line like factory. car runs horribly. Spits/sputters/kicks/buckles, even when reved to around 3500 rpm. I disconnected egr , plugged the vac line, and car runs great, except rough idle. Rough idle is also with egr connected. I have checked for vac leaks with no findings. Any ideas? is this typical with old J cars?
PS: new plugs, IAC, TPS, dist cap, rotor.
Thanks
1987 sunbird gt, non turbo. Orignal owner. EGR valve connected to vacuum line like factory. car runs horribly. Spits/sputters/kicks/buckles, even when reved to around 3500 rpm. I disconnected egr , plugged the vac line, and car runs great, except rough idle. Rough idle is also with egr connected. I have checked for vac leaks with no findings. Any ideas? is this typical with old J cars?
PS: new plugs, IAC, TPS, dist cap, rotor.
Thanks
#3
#5
Senior Member
If smoother, you could have a bad injector/ECM, since you found no leak around the throttle body.......
Old trick was to attach a timing light to car and shine it on cone of fuel coming out of the injector in the throttle body.....If instead of a fine mist, you saw droplets, it usually was an ECM.....
Old trick was to attach a timing light to car and shine it on cone of fuel coming out of the injector in the throttle body.....If instead of a fine mist, you saw droplets, it usually was an ECM.....
#7
Sprayed carb cleaner in the TBI, and engine slowed down a bit, at one point almost stalled, probably because I sprayed too much. All I noticed was slower rpm'*. Very difficult to tell if engine was smoother or not. To me, inconclusive. Guess Im out of options for now. FI is not the original, and when I replaced it years ago it did not make any difference in the rough idle. The old one was still good.
#8
Senior Member
True Car Nut
People,
1987 sunbird gt, non turbo. Orignal owner. EGR valve connected to vacuum line like factory. car runs horribly. Spits/sputters/kicks/buckles, even when reved to around 3500 rpm. I disconnected egr , plugged the vac line, and car runs great, except rough idle. Rough idle is also with egr connected. I have checked for vac leaks with no findings. Any ideas? is this typical with old J cars?
PS: new plugs, IAC, TPS, dist cap, rotor.
Thanks
1987 sunbird gt, non turbo. Orignal owner. EGR valve connected to vacuum line like factory. car runs horribly. Spits/sputters/kicks/buckles, even when reved to around 3500 rpm. I disconnected egr , plugged the vac line, and car runs great, except rough idle. Rough idle is also with egr connected. I have checked for vac leaks with no findings. Any ideas? is this typical with old J cars?
PS: new plugs, IAC, TPS, dist cap, rotor.
Thanks
The following users liked this post:
pippo (10-20-2018)
#9
Well, its the 2nd NEW EGR I bought, and the car behaves the same way. I should have mentioned that with EGR disconnected when I floor the pedal and accelerate, reaching say, 5000 rpm the car flies! No sputtter, or anything. Its like it doesnt matter.
To summarize:
1) EGR disconnected, rough idle , but no hesitation/rough engine when pedal floored/accelerate
2) EGR connected, rough idle, terrible running car, awful / spitting/stumbling acceleration.
What the heck is going on??????
To summarize:
1) EGR disconnected, rough idle , but no hesitation/rough engine when pedal floored/accelerate
2) EGR connected, rough idle, terrible running car, awful / spitting/stumbling acceleration.
What the heck is going on??????
#10
Senior Member
True Car Nut
Ah, didn't know you had already replaced the EGR.
This sounds like massive intake air leak of some sort.
This sounds like massive intake air leak of some sort.
The following users liked this post:
pippo (10-21-2018)
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