engine dies from idle
Thread Starter
Racer
Joined: Jul 2003
Posts: 401
Likes: 0
From: texas,, at last
engine dies from idle
guys,
got an 86,
it starts up great and idles but as soon as ya press the gas pedal it dies,
if you quickly lift back off sometimes it picks back up,
you have to feather the pedal real gently to be able to pull away,
it's not as bad when warm,
can't get any info from WINaldl,
any ideas,
natt
got an 86,
it starts up great and idles but as soon as ya press the gas pedal it dies,
if you quickly lift back off sometimes it picks back up,
you have to feather the pedal real gently to be able to pull away,
it's not as bad when warm,
can't get any info from WINaldl,
any ideas,
natt
Melting Slicks
Joined: Aug 2003
Posts: 3,394
Likes: 393
From: Lakeville MI
There could be many things wrong. Here's an easy first test:
Disconnect the MAF sensor. You will get an SES light.
If it runs better in limp home mode, where the fueling is driven by the TPS then you have MAF issues.
While I was having MAF issues recently, my car would run much better in limp home mode.
Otherwise, check timing, fuel pressure, sensor data, etc.
Disconnect the MAF sensor. You will get an SES light.
If it runs better in limp home mode, where the fueling is driven by the TPS then you have MAF issues.
While I was having MAF issues recently, my car would run much better in limp home mode.
Otherwise, check timing, fuel pressure, sensor data, etc.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
The fuel pump relay being broken, would only make it longer to start the engine. Once oil pressure reaches 4 psi ,with some cranking, the oil pressure switch will run the pump as a back up. But glad to see you are getting somewhere.
Read this to test the TPS:
https://www.corvetteforum.com/techti...D=55&TopicID=2
Make sure the two screws holding the TPS are not loose.
Read this to test the TPS:
https://www.corvetteforum.com/techti...D=55&TopicID=2
Make sure the two screws holding the TPS are not loose.
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Thread Starter
Racer
Joined: Jul 2003
Posts: 401
Likes: 0
From: texas,, at last
thanks,
the car used to take about 10 seconds to start, now it starts instantly,
nice to see this paper is written by lars,
he rebuilt the carb on my 77, and it was a different car,
i took it over to him from the uk,
thanks again for the help/replies,
natt
the car used to take about 10 seconds to start, now it starts instantly,
nice to see this paper is written by lars,
he rebuilt the carb on my 77, and it was a different car,
i took it over to him from the uk,
thanks again for the help/replies,
natt
Thread Starter
Racer
Joined: Jul 2003
Posts: 401
Likes: 0
From: texas,, at last
mmmm,
disconnected the iac and nothing changed,
disconnected the maf and still nothing changed,
followed lars paper but i could not get the idle lower than 900 rpm, the idle screw was all the way out,
anyone got a gallon of gas and a lighter?????
disconnected the iac and nothing changed,
disconnected the maf and still nothing changed,
followed lars paper but i could not get the idle lower than 900 rpm, the idle screw was all the way out,
anyone got a gallon of gas and a lighter?????
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
