85 GSL-SE Stalling
05-05-12, 12:31 PM
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85 GSL-SE Stalling
Problem: Engine stalls when decelerating. Tachometer will drop to 500 and engine will die. Happens when downshifting to a stop or in neutral if I rev the engine and then let go of the gas pedal.
It will start up and idle. The engine shakes like there is a miss but it will run. It only shuts off when I'm decelerating.
At Idle I can turn on the A/C and the engine will not shut off although the RPMs will decrease slightly. When I shut the A/C off though the RPMs will drop to 500 and SLOWLY increase back up to around 900. This takes approximately 1 minute to go back up to around 900.
I was reading about the MAF and it's being said that it should close gradually and not slam shut. So I go in there and start playing with the door on the MAF. It certainly shuts as soon as I let it go. I open up the throttle and let it go and I can hear the door on the MAF slamming shut.
(Here so you get a laugh. I had the key in the ignition in the ON position so I keep hearing this spraying when I'm playing with the door. Guess what happened? I flooded the hell out of if after just changing the oil. I went through the unflood procedures and got it started this morning.)
I have been all over this site and have done a few checks that have been recommended.
I've Checked the TPS with two multimeters and adjusted it properly.
I checked and cleaned the spark pugs. The car came with Autolite 2526. I called FRAM and verified that these are the correct plugs.
Replaced the oil and oil filter with Castrol GTX and a K&N oil filter
Replaced the fuel filter with a WIX universal Fuel filter.
Removed the air filter for now while I'm diagnosing.
I sprayed starting fluid all over the hoses I could find and there was no change in RPM although when I spray the air box (where the air filter sits) the engine RPMs decrease.
If I pinch the hose coming off of the BACV the RPS also decrease.
Everything is stock on the vehicle.
This is what I have gents I know this topic has been beat to death in some forums but I'm not seeing any clear diagnosis procedures.
It will start up and idle. The engine shakes like there is a miss but it will run. It only shuts off when I'm decelerating.
At Idle I can turn on the A/C and the engine will not shut off although the RPMs will decrease slightly. When I shut the A/C off though the RPMs will drop to 500 and SLOWLY increase back up to around 900. This takes approximately 1 minute to go back up to around 900.
I was reading about the MAF and it's being said that it should close gradually and not slam shut. So I go in there and start playing with the door on the MAF. It certainly shuts as soon as I let it go. I open up the throttle and let it go and I can hear the door on the MAF slamming shut.
(Here so you get a laugh. I had the key in the ignition in the ON position so I keep hearing this spraying when I'm playing with the door. Guess what happened? I flooded the hell out of if after just changing the oil. I went through the unflood procedures and got it started this morning.)
I have been all over this site and have done a few checks that have been recommended.
I've Checked the TPS with two multimeters and adjusted it properly.
I checked and cleaned the spark pugs. The car came with Autolite 2526. I called FRAM and verified that these are the correct plugs.
Replaced the oil and oil filter with Castrol GTX and a K&N oil filter
Replaced the fuel filter with a WIX universal Fuel filter.
Removed the air filter for now while I'm diagnosing.
I sprayed starting fluid all over the hoses I could find and there was no change in RPM although when I spray the air box (where the air filter sits) the engine RPMs decrease.
If I pinch the hose coming off of the BACV the RPS also decrease.
Everything is stock on the vehicle.
This is what I have gents I know this topic has been beat to death in some forums but I'm not seeing any clear diagnosis procedures.
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NickNac113
1st Generation Specific (1979-1985)
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10-01-15 09:25 PM
