Holy Smokes! Before I'm able to fix one problem another arrives.. My car sometimes idles hard in park.. Then out of nowhere right before ur eyes, it runs smooth as butter. It hesitates like a ***** at high and low speeds in every gear. Before this problem I've replaced my fuel pump, fuel sending unit, fuel filter, distributor, spark plugs, wires, and mass air flow sensor. Is it the FUEL INJECTORS?

 

what yr? have you had it scanned for trouble codes?

 

It's a 95, I had the engine replaced with a 95 firebird engine. Everytime I hook up the diagnostic machine it dosnt show me a relevant trouble code. I think I'd have to get the harness replaced to get correct readings

 

95 is a strange one. obd1 with a obd2 plugin. what codes come up?

 

well, i tried to bring up some codes, even when my engine light come on rarely. when the device is connected the mechanic has no explanation. he said he thinks its a code for a problem with the actual the plug in since the engine came out of a firebird. just yesterday i returned the stock maf sensor and replaced it with a pricey $430 jet performance sensor, poured a can of k44 fuel system cleaner in there and man did it make a difference! . except for the occasional problem coming back. its really lookin like the system has some carbon somewhere in there. what u think?

 

95 firebird motor is the same as a 95 camaro. did the ecm (main computer) get changed with it?