Idle Issues
Thread Starter
Burning Brakes
Joined: Jul 2017
Posts: 750
Likes: 86
From: St Petersburg
Idle Issues
Hi all 1989 C4 Vette
few days ago the engine started to idle high, but if I hit the gas pedal it would idle down back to normal
now yesterday it wont idle at all. Irt starts and runs but if I let go the gas pedal it shuts down. So before I take it to a mechanics I thought I'd ask here
1 Throttle position sensor
2. Air control valve'
but also on the car the air intake system doesn't seem to be factory and has the Bosch name on it and there is another "relay" or something underneath ( pictures attached)
few days ago the engine started to idle high, but if I hit the gas pedal it would idle down back to normal
now yesterday it wont idle at all. Irt starts and runs but if I let go the gas pedal it shuts down. So before I take it to a mechanics I thought I'd ask here
1 Throttle position sensor
2. Air control valve'
but also on the car the air intake system doesn't seem to be factory and has the Bosch name on it and there is another "relay" or something underneath ( pictures attached)
Last edited by BillDurant; Aug 5, 2017 at 12:11 PM.
Racer
Joined: Jul 2016
Posts: 346
Likes: 26
Hi all 1898 C4 Vette
few days ago the engine started to idle high, but if I hit the gas pedal it would idle down back to normal
now yesterday it wont idle at all. Irt starts and runs but if I let go the gas pedal it shuts down. So before I take it to a mechanics I thought I'd ask here
1 Throttle position sensor
2. Air control valve'
but also on the car the air intake system doesn't seem to be factory and has the Bosch name on it and there is another "relay" or something underneath ( pictures attached)
few days ago the engine started to idle high, but if I hit the gas pedal it would idle down back to normal
now yesterday it wont idle at all. Irt starts and runs but if I let go the gas pedal it shuts down. So before I take it to a mechanics I thought I'd ask here
1 Throttle position sensor
2. Air control valve'
but also on the car the air intake system doesn't seem to be factory and has the Bosch name on it and there is another "relay" or something underneath ( pictures attached)
but seriously I see a ton of duck tape and I'm concerned on what bubba has done to your car. People here should help.
Last edited by warrior4jesus; Aug 5, 2017 at 12:11 PM.
Melting Slicks
Joined: Jan 2008
Posts: 2,054
Likes: 120
From: AZ
Bosch is an OEM supplier for many manufacturers; many parts. That's a MAF, which has a somewhat fragile heated wire that measures airflow into the engine; data used by the ECM's control. Some remove the protective screen (ome theory about increased power) but it can get dirty and might respond to spray clean with a carb cleaner. Your 'downstream' concern is for unmetered air entering the intake, which confuses the ECM.
It may have a vacuum leak(s) or a failing sensor. Are there any codes (CE light)? That 'speed tape' -NOT-, is a bad sign of proper care.
It may have a vacuum leak(s) or a failing sensor. Are there any codes (CE light)? That 'speed tape' -NOT-, is a bad sign of proper care.
Last edited by whalepirot; Aug 5, 2017 at 01:03 PM.
