Help: Stalls when put into gear
Thread Starter
2nd Gear
Joined: Jan 2014
Posts: 2
Likes: 0
Help: Stalls when put into gear
i have a '90 Base. Really odd series of events.
Problem: I can start the car, but it stalls when I am not giving it gas. It is drivable until I approach a stop and then stalls when I have to rely on the idle
Here is my odd backstory. Prior to this problem creeping up, I was trying to do an R12 to R-134 conversion on a leaky A/C/ I replaced most of the gaskets and pulled a vacuum. I tried to add the R-134 but could never get the compressor to kick in..... so I abandoned that little endeavor for another day........ put the bonnet back down and decided to take the car for a drive. It was fine for the first 3 miles but at the next start, i ran into the idle problems.
Reads of the forum point ot a multitude of potential problems - Im even scratching my head wondering if i bumped the TPS or IAC..... but ...
Question: Is it possible that some part of my A/C project has screwed up Vaccum that would support the idle?
Problem: I can start the car, but it stalls when I am not giving it gas. It is drivable until I approach a stop and then stalls when I have to rely on the idle
Here is my odd backstory. Prior to this problem creeping up, I was trying to do an R12 to R-134 conversion on a leaky A/C/ I replaced most of the gaskets and pulled a vacuum. I tried to add the R-134 but could never get the compressor to kick in..... so I abandoned that little endeavor for another day........ put the bonnet back down and decided to take the car for a drive. It was fine for the first 3 miles but at the next start, i ran into the idle problems.
Reads of the forum point ot a multitude of potential problems - Im even scratching my head wondering if i bumped the TPS or IAC..... but ...
Question: Is it possible that some part of my A/C project has screwed up Vaccum that would support the idle?
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
https://www.corvetteforum.com/forums...post1570563689
Highly unlikely. They aren't really connected together in any way except for the vacuum that operates the HVAC doors inside the cabin.
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
I suggest a minimum idle adjustment. That will get your TPS where it should be and should stop your dying at idle:
https://www.corvetteforum.com/forums...post1570563689
https://www.corvetteforum.com/forums...post1570563689
Start with the basics.
Thread Starter
2nd Gear
Joined: Jan 2014
Posts: 2
Likes: 0
thanks.....
I adjusted my idle. I was a little surprised to see the cap still covering the screw. I assumed that a car that age would have been tinkered with. Who knows. I'm not the original owner so perhaps the TB was replaced
I adjusted the idle a little high (500 ish) - I assume that's not a huge problem.
runs fine. took it for a spin.
thanks for the help
I adjusted my idle. I was a little surprised to see the cap still covering the screw. I assumed that a car that age would have been tinkered with. Who knows. I'm not the original owner so perhaps the TB was replaced
I adjusted the idle a little high (500 ish) - I assume that's not a huge problem.
runs fine. took it for a spin.
thanks for the help
Melting Slicks
Joined: Jun 1999
Posts: 2,931
Likes: 127
From: Ashland Alabama
I'm glad its working ok but I bet you have vacuum leak somewhere. The lines crack easy with age and the rubber elbow joints they use on the end of the lines in places come out very easily. Can be a nightmare to find.
Its your call if you want to go hunting for the culprit but with the symptoms you listed the job you were doing to the car Id have to believe its a vacuum leak. A small one does exactly what you were having problems with.
Its your call if you want to go hunting for the culprit but with the symptoms you listed the job you were doing to the car Id have to believe its a vacuum leak. A small one does exactly what you were having problems with.
