Engine starts and stumbles off
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 844
Likes: 0
From: Cape Cod Ma
Engine starts and stumbles off
My 88L-98 will start right up and then will stummble alittle to a stop. Dosen't desile. You can keep it running but won't idle alone. The only thing different I did was a new intake and a compleate tune up. The timing is good, the fuel pressure is good, the used afftermarket T/B I got is on it, but I put my stock one one and the same thing was happening. I don't know where else to look. Thanks :thumbs: Also all the emisions stuff is off except the egr. :beatdeadhorse:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Engine starts and stumbles off (redfast)
Make sure all vacuum lines are hooked up:
-one under the TB
-two on the right side of the TB
-check for vacuum leaks around the TB
Will it idle at normal idle speed if you press the accelerator? If so adjust the stop on the TB to keep it running at idle and use the instructions on my site to set the base idle and TPS.
Does the new TB have a gasket under the top plate; if not get some good sheet gasket material and cut one for it.
Did you clean the IAC and it's bore under the TB?
-one under the TB
-two on the right side of the TB
-check for vacuum leaks around the TB
Will it idle at normal idle speed if you press the accelerator? If so adjust the stop on the TB to keep it running at idle and use the instructions on my site to set the base idle and TPS.
Does the new TB have a gasket under the top plate; if not get some good sheet gasket material and cut one for it.
Did you clean the IAC and it's bore under the TB?
Safety Car
Joined: May 2003
Posts: 3,789
Likes: 0
From: [Quote=WOEII] Is dried brown doodie powders man! [/Quote]
Re: Engine starts and stumbles off (65Z01)
[Hijack]
I have just done extensive changes and am having a similar issue. 65Z01, let me ask you, could failing to plug the vacuum port under the TB cause this: ?
http://forums.corvetteforum.com/zerothread?id=796728
After reading this thread it hit me instantly that I didn't plug that port :mad
[^^^]
I have just done extensive changes and am having a similar issue. 65Z01, let me ask you, could failing to plug the vacuum port under the TB cause this: ?
http://forums.corvetteforum.com/zerothread?id=796728
After reading this thread it hit me instantly that I didn't plug that port :mad
[^^^]
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 844
Likes: 0
From: Cape Cod Ma
Re: Engine starts and stumbles off (Upstate)
I didn't replace the o-rings on the injectors because I was going to replace the injectors in the near future. Could I be getting vacum leaks from the injector ports. You can move the injectors around....they are origanal. Not a realy tight fit. :cheers:
