Please I need HELP my car is misfiring like crazy
04-20-2005, 09:59 AM
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Please I need HELP my car is misfiring like crazy Hello I am new to this site but i need some serius help my car is misfiring and everytime is in idleing the rpms drop really low almost shutting the car down I have no idea what it is my car is a 98 z28 camaro and every time I floor it black smoke comes out and is got a that is is so help
04-20-2005, 10:41 AM
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it sounds like an ignition issue, blowing black smoke could be unburned fuel from the ignition not igniting it.
Check your plug wires first, especially if they've ever been off before.
Plugs next, coils, etc...
Check your plug wires first, especially if they've ever been off before.
Plugs next, coils, etc...
04-21-2005, 02:07 AM
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If i where u i would be extremely careful try not to rev engine too high. My 98z was doing samething. And it was good i think the misfiring caused to blow a hole on the side of my block right behind the air pump on the side of the block sucks so much. I think my coils got wet from heavy rain storm we had here in CT back in the last week of march. my car has 93k when the engine went.
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04-21-2005, 08:18 PM
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Help my car is misfiring like crazy Hello is me again i thank you for your input i have a little more information this time about my car ideling really really rough and almost dies and when i am in the highway it feels normal and then its starts missing like i can feel it where it loses power I took my car to the dealer and they said the 2 o2 sensors on the left side are bad so you think that is all it has the dealer wanted me to get the injectors changed and a misfire code was in there but so far I have changed the plugs the intake gasket (because ithought it was leaking) the throttle positioning sensor I think that is what is called so please help this is the information I have I need help All my savings are being spent trying to fix a problem I don't know so tell me what you think
04-22-2005, 02:09 PM
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Coil Packs If for some reason you had the coil packs off you may have put them on the wrong sides. Common problem for a 98. And Yes getting them on the right side it does make a difference...
04-22-2005, 02:37 PM
#12
TPS(throttle position sensor) I had the same problem. Couldnt figure it out for 10,000 miles. I changed the plugs, wires, o2's, Switched coil packs out, nothing worked. Thought it was a bad valve spring so I changed my cam and put new valve springs in, didnt work. Finally I put volt meter on the TPS, when the car was ideling the volts would jump all over the place and when you went WOT it would only go to 3.2 volts (I think its supposed to be at 4.5-5. volts at WOT) so anyways I went and got one,it was $36.00 and changed my plugs. Long story short it worked and your symptoms are identical to the ones I was having. Try changing the TPS, I think you will be happy with the results.
04-24-2005, 10:59 AM
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I am going to try replacing the trottle position sensor than i am going to try to change the crank position sensor that is if I replace my O2 sensors and it does not work because at the dealer they told me that 2 O2's were bad on the left side and they said that caused my left side injectors to go bad too but I don't belive that caused my injectors to go bad what do you think any way I keep you updated and keep the help coming.thanks
04-24-2005, 01:21 PM
#14
Originally Posted by assassinz28
I am going to try replacing the trottle position sensor than i am going to try to change the crank position sensor that is if I replace my O2 sensors and it does not work because at the dealer they told me that 2 O2's were bad on the left side and they said that caused my left side injectors to go bad too but I don't belive that caused my injectors to go bad what do you think any way I keep you updated and keep the help coming.thanks
did your service engine soon light come on? if the O2 sensors are bad, that light should come on. Autozone can pull the codes for free and tell you what they are saying.
the O2's making the injectors go out is
Last edited by TheBlurLS1; 04-25-2005 at 09:33 AM.
04-26-2005, 09:53 AM
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well I was noticing that my service engine soon is not coming on and If it was my o2's it would come on I am going to try to replace the crank position sensor what do you think
04-30-2005, 01:42 PM
#17
Originally Posted by assassinz28
well I was noticing that my service engine soon is not coming on and If it was my o2's it would come on I am going to try to replace the crank position sensor what do you think
05-24-2005, 03:11 PM
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It's the 02 sensor.
Heres what happens (has happened to me 3 times till i got extension cables).
IE: Right side 02 goes out (only have one in my car...2 in a "normal" car heh heh heh).
After a little bit of running, the computer will lean out the right bank, causing the misfire code your getting.
Change the 02 sensor first. then work up to plugs, wires, injectors etc.
Trust me on this. 02 sensor first.
Heres what happens (has happened to me 3 times till i got extension cables).
IE: Right side 02 goes out (only have one in my car...2 in a "normal" car heh heh heh).
After a little bit of running, the computer will lean out the right bank, causing the misfire code your getting.
Change the 02 sensor first. then work up to plugs, wires, injectors etc.
Trust me on this. 02 sensor first.