HELP...car stumbles low RPM's
#1
HELP...car stumbles low RPM's
I have a 1996 Pontiac Trans am...I have a 230 236 Comp Cam with the 1.6 RR, pushrods, springs...yada yada yada...well I just rebuilt the motor a few weeks ago and everything was running fine...then the other day I was driving and the car started to stumble in low RPM's...(I have a scanmaster)and it threw a code for the right 02 sensor...so I changed it and the car was running fine...then yesterday the stumbling started agian...no codes but it seamed from the scanmaster that in low RPM's the left side was bottoming out on fuel delivery...In knowing that I changed the left O2...whats funny is that it doesn't stumble all the time...sometimes, and when it does stumble it dies at lights and runs really rough...But agian no codes..so I dont know what to do...could my (new) left o2 be bad...or is it something else??? Please help me soon...I need my baby back.
thanks
matt
thanks
matt
Last edited by lillbush5555; 04-16-2003 at 10:00 PM.
#4
according to the scanmaster it was bottoming out on the fuel delivery....saying the the right side was correct at approx 128-130 and the right side was droping to around 108-110...so I dont know my friend said that that ment that the left side was bottoming out...BUT WHY??? does that make sense???
thanks
matt
thanks
matt
#7
Originally posted by lillbush5555
according to the scanmaster it was bottoming out on the fuel delivery....saying the the right side was correct at approx 128-130 and the right side was droping to around 108-110...so I dont know my friend said that that ment that the left side was bottoming out...BUT WHY??? does that make sense???
thanks
matt
according to the scanmaster it was bottoming out on the fuel delivery....saying the the right side was correct at approx 128-130 and the right side was droping to around 108-110...so I dont know my friend said that that ment that the left side was bottoming out...BUT WHY??? does that make sense???
thanks
matt
Switching the O2s is a good idea. When I had the split BLM issue it turned out my right bank injectors were leaking as hell.
Fuel pump, fuel filter, regulator is outta question right now, as you have a problem with only one side of the engine.
Oh, btw, in what cell does this occour?
#9
Originally posted by 94GreenZ28
I have a similar problem. My BLMs are higher on one side. I've replaced both O2s, fuel injector, spark plugs, wires, header gaskets and I still have a stumble. I've given up.
I have a similar problem. My BLMs are higher on one side. I've replaced both O2s, fuel injector, spark plugs, wires, header gaskets and I still have a stumble. I've given up.
Just trying to help you...
#10
I pretty much have the same problem as everyone else(stumble under load around 2000). I also get a little miss around 5500. The BLMs on the left side will be 128 at idle and 118 on the right. Would that be a possible cause of my stumble? The only thing I can think of that would cause BLMs like that I've replaced.
injectors
O2s
exhaust and intake gaskets
injectors
O2s
exhaust and intake gaskets
#11
I have the same problem only that when my car is cold it runs o.k once it warms up it starts stumbling and idling rough. it sounds like a harley-davidson. i guess because the timing is all messed up.
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