Performance issue with 1998 Z24 - Performance Forum

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Performance issue with 1998 Z24
Sunday, January 13, 2013 11:00 AM
Hello everyone, I have a problem with my car and wondered if it happened to you fellow j-body members. I figured this would be the best place to ask since you all probably had or heard of someone with the same issue, So, I have a 1998 Chevrolet Cavalier Z24, 5-speed with the 2.4L naturally. Im from Canada and the car has just shy of 250,000kms. Cars runs great and always has and recently a symptom has shown up. Car starts and idles normally and no codes show up from my reader AND no check engine light. The symptom is when i take off in first and any gear at low rpm when i push the gas it sputters a bit then goes away and feels normal. Anytime in any gear if i try to floor it the sputtering will show up as well. Ive been searching on line to all sorts of "Could be" problems and wanted to narrow it down. Ive heard everything from cracked spark plug to fuel filter to egr valve. So again taking off in 1st OR when i switch to any gear and rpm is low, if i push the gas even i little too hard the engine will sputter and then go away and feels normal. Its like it happens from idle to say 2-2500 rpm and then 2500 to red line the car has full power and goes no problem. I guess any posts here would be wonderful.

Thank you in advance
Patrick

Re: Performance issue with 1998 Z24
Friday, January 18, 2013 10:17 PM
does your car have a rough idle? if you sit in neutral and rev it up and let the rpms come back down does your engine come back to regular idle then, the idle suddenly drops and sounds like the motors going to stall out on itself?
Re: Performance issue with 1998 Z24
Saturday, January 19, 2013 9:52 PM
ID try changing your throttle positioning sensor
Re: Performance issue with 1998 Z24
Sunday, January 20, 2013 11:27 AM
Your EGR valve is stuck open.
Re: Performance issue with 1998 Z24
Wednesday, January 23, 2013 2:50 PM
Those two options or also check the idle air senosr....i dont remember what its called. Also when was the last time you changed the white coil pack housing under that metal plate that reads "2.4L Twin Cam"


GMR has got nothing on this
Re: Performance issue with 1998 Z24
Wednesday, January 23, 2013 3:27 PM
Well I finally got a code from the reader that said cylinder 1 misfire detected.. I decided to pick up some spark plugs and change them and seems this problem went away.. It's been 3 days and the symptom hasn't returned and the motor is back to being responsive and as strong as ever. Thank you all for reading and taking the time to write.
Re: Performance issue with 1998 Z24
Wednesday, January 30, 2013 7:57 AM
I'm just throwing it out there. My 97 had the t-t-ta-ta-take o-o-off (lol) problem too, went threw the posted above. Ended up not being enough fuel pressure cause my fuel pump was lacking. Replaced it and burning rubber again.
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