Remove the throttle butterfly unit and thoroughly clean with carboretter cleaner or WD40 in a round butterfly seatings, as build up of residue will not allow the throttle butterfly to close, hence sending false readings. I had the same problem on my ZX 16v. it was just the small vac hose on the inlet manifold to the ecu. It had a split in it. Try that.
Recently had same problem. Mechanic replaced 2 sensors (unknown which 2) and gave complete tune-up. Runs fine now.
It shouldn't unless you messed up the 02 sensors.
They are replaced when they go bad.
If the oxygen sensors for the 1991 Chevy 4.3 is running rich when it is warmed up it is best to have the sensors replaced. Once the sensors are replaced this should resolve the issue.
two sensors camshaft and crankshaft if either of the two or both are bad this will cause the stalling.
Have you had your 4 oxygen sensors replaced? It turns out when they replaced my oxygen sensors, they were after market parts so the service engine light did not come and gave codes even though they were replaced.
oxygen sensors or O2 sensors
There are many, many sensors in this and all of todays cars. Sensors for engine control and monitoring, ABS, Airbag, traction control, suspension, A/C, etc.
I replaced all 3 sensors and the problem still exists. Do I need to have the ECM reprogrammed at the dealership? Are there any other suggestions?
No, they will need replaced if defective.
if your speed sensors are failing you will get a light on your dash either abs or taction control light you will no longer have abs or trac control
About £77 for the sensor plus time to fit and re-program, about another £60