1995 Monte Carlo 3.4 DOHC?

Question

I have replaced the mass air flow sensor, Intake Air Sensor, throttle position sensor, idle air control sensor, EGR valve, all the temp sensors. When the engine is warm, the car starts acts like it is not getting enough air , or maybe not enough gas, stalls , then will not start back up until the engine cools. What could possibly be causing this?

Answer 1

You need to ck a couple of things fuel pressure and volume need to be verified. Also a plugged cat. convertor may cause a total lack of power. Also may be a ECM issue . Plugged fuel filters O2 sensors latched rich. Is the SES lamp on? The sad thing is I would of charged you 80.00 and then you could of replaced just what you needed to. Instead you spent probably 500.00 and are no closer. Go to IATN.NET and find a ASE Master Drivability L1 Certified Pro and ask for a diagnosis. At least you will know whats going on. Good Luck!

Answer 2

Check the Ignition Control Module it could fail when warm. 3800 V6 does the same thing and also the 3100. I had that problem one time in my 1995 Pontiac Grand Prix GTP Vin Code X. very Powerful Motor

Answer 3

Could be a restricted cat converter,loosen it at exh manifold to test .

Answer 4

next time it happens check for fuel pressure - there is a valve on the fuel injector rail