GregBPAU
New member
- Joined
- Apr 10, 2025
- Messages
- 16
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- Buick Ownership
- 1995 Buick Park Avenue Ultra
Car is a 1995 Buick park avenue Ultra
Series I L67 Supercharged and 4T60E transmission.
The issue is jerking, back and forward like you are being shaken, and not being able to go past 3500 rpm.
Car drives fine if you don't step on the gas and if you disconnect the battery and re- connect it, The car can drive as fast as an arrow. but after restart if the car gets warm its game over
This issue originates when the engine gets unusually hot.
When in neutral, the engine happily revs to 4k and the injectors limit the revs like designed.
The old ECU threw codes regarding both the cam an crank sensor but i changed both
the only thing that really made a difference was changing the Ignition module but after changing the ECU the check engine light finally turned off, but the problem is back.
Something somewhere is triggering something that causes stumbling, jerks and loss of power when the car gets hot.
The only thing I haven't really replaced is the MAF sensor. Or anything Fuel related. Maybe a degraded Fuel pressure regulator will deliver insufficient fuel when hot?
I'm on my second ECU. Second set of coils, Changed all sensors except of the maf and EGR...
Series I L67 Supercharged and 4T60E transmission.
The issue is jerking, back and forward like you are being shaken, and not being able to go past 3500 rpm.
Car drives fine if you don't step on the gas and if you disconnect the battery and re- connect it, The car can drive as fast as an arrow. but after restart if the car gets warm its game over
This issue originates when the engine gets unusually hot.
When in neutral, the engine happily revs to 4k and the injectors limit the revs like designed.
The old ECU threw codes regarding both the cam an crank sensor but i changed both
the only thing that really made a difference was changing the Ignition module but after changing the ECU the check engine light finally turned off, but the problem is back.
Something somewhere is triggering something that causes stumbling, jerks and loss of power when the car gets hot.
The only thing I haven't really replaced is the MAF sensor. Or anything Fuel related. Maybe a degraded Fuel pressure regulator will deliver insufficient fuel when hot?
I'm on my second ECU. Second set of coils, Changed all sensors except of the maf and EGR...