I have a 96 2.4L cavalier and for some reason when i take off @ a gradual pace it hesitates @ low rpms to about 2400 and then drives fine. However if i mash the gas down from take off it accelerates fine. The car idles normally and doesn't have a CEL. I replaced the fuel pump about a year ago, just changed the fuel filter/ air filter. i am guessing the iac, map, tps, iat are good since there is no cel. Any suggestions on what could be the cause of the problem?




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anyone has any input on this... your help would be gladly appreciated!




when it comes to boobs i need a girl with bad grades cause im tired of all the ones walking around with straight a's

I am having the same phantom problem man. I have no C.E.L. and cannot figure out why it is hesitating so bad before 3k RPM . Here is where I am going to start. It is a article regarding No Trouble Code Problems. Pretty good info from what I have seen so far.

http://autorepair.about.com/cs/faqs/l/aa042603a_1.htm


Windy City TurboZ

I also thought it was fuel related and had my buddies shop hook up a mechanical fuel pressure guage and it is reading good pressure at idle and up high is 60psi. I thought maybe it was that Sock thing clogged thats attached to the pump causing a problem in a specific operation range.


Windy City TurboZ

I should note that the car is running extremely lean regardless of the pressure of fuel going in according to my wideband. It is reading 18-20 AFR at idle . Should be 14.7 like it was before, I haven't changed any tuning with HP Tuners and I know that my injector constant is correct.


Windy City TurboZ

Now my idle started going crazy so my first assumption is a faulty Throttle Position Sensor, but why no PO122 or PO123 Code ???TPS Low Voltage & or TPS High Voltage... I hate to buy the damn sensor only to find out thats not the problem


Windy City TurboZ

Someone suggested checking the spark plugs n boots so im going to give that a try




when it comes to boobs i need a girl with bad grades cause im tired of all the ones walking around with straight a's

did that solve your problem ?


Windy City TurboZ

no put today the check engine light came on and gave me the codes p1133 and 1406... hopefully this will solve the problem!




when it comes to boobs i need a girl with bad grades cause im tired of all the ones walking around with straight a's

problem has been solved changed the o2 and map sensors!




when it comes to boobs i need a girl with bad grades cause im tired of all the ones walking around with straight a's