car cuttin out on me, spark/fuel??!
02-11-2006, 08:42 AM
#1
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car cuttin out on me, spark/fuel??!
ok, this just started yesterday on '91 LE on my way home from school. the car will randomly cut out on me for like half a second, and do it a couple of times, unless i take my foot off the gas. it sorta feels like if your in first gear and tap the gas back and forth, that bucking motion. it seemed to do it more violently when the motor was cold. but it happens at random, 3 times in one day. i havent looked at it yet, but i think something with spark/fuel/misfire. plugs, wires, cap and rotor are less than 10k old (NGK iridium's). 151k on motor. thanks in advance
Sean
Sean
02-13-2006, 05:18 PM
#6
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i thought about my fuel pump, but i dont think it would cut in and out that quickly and randomly like that, it would be a gradual power loss. im leaning more towards spark on it now. thanks for the comments though
02-14-2006, 06:52 PM
#7
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Location: Austin Texas
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acuually u might wanna check your fuel filter again, because if you have a bunch of build up in your gas tank then your new fuel filter isnt really doin much, just undo the bottom hose and see how the gas goin thru it is lookin
02-17-2006, 10:41 AM
#9
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Originally posted by gubermyster
acuually u might wanna check your fuel filter again, because if you have a bunch of build up in your gas tank then your new fuel filter isnt really doin much, just undo the bottom hose and see how the gas goin thru it is lookin
acuually u might wanna check your fuel filter again, because if you have a bunch of build up in your gas tank then your new fuel filter isnt really doin much, just undo the bottom hose and see how the gas goin thru it is lookin
02-19-2006, 08:11 AM
#11
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Location: Ft. Worth, TX
Posts: 46
don't forget to check your fuel pressure regulator on the fuel rail. you could be losing fuel pressure due to a cracked diaphram in it. That will cause raw fuel to go into motor. Will run like crap. Worth a check. Could be cat, but not likely. A clogged cat would kill all but idle driveabiltiy. MAF generally only gives problems at just off of idle and sometimes highway speeds of 60 or greater. At least that is how mine performed on me. YOu can always clean the MAF with some brake cleaner, brake cleaner not carb cleaner.
It probably isn't your egr or aiiv. The egr is supposed to be sending exhaust gases through when you are not at idle. and the aiiv doesn't really matter to the driveability of the vehicle, it is only there to send extra air into exhaust stream to help the cat burn it all easier.
What you need to focus on is the W's. When, Where, What speed, What time( i.e. car is hot or cold), what throttle position. Sit down and really think about everything that has to do with the driving conditions inside and outside the vehicle when it does it. Was is sunny outside or raining. Humidity can have an effect on suff. That is how others can help you troubleshoot. We can throw stuff out all day long and have you check the entire damn car, but if you give others better info, then it makes the troubleshooting effort go alot easier. Don't worry, I am not directing this at anyone in specific. that should be common practice for everyone when diagnosing a problem.
Jason
It probably isn't your egr or aiiv. The egr is supposed to be sending exhaust gases through when you are not at idle. and the aiiv doesn't really matter to the driveability of the vehicle, it is only there to send extra air into exhaust stream to help the cat burn it all easier.
What you need to focus on is the W's. When, Where, What speed, What time( i.e. car is hot or cold), what throttle position. Sit down and really think about everything that has to do with the driving conditions inside and outside the vehicle when it does it. Was is sunny outside or raining. Humidity can have an effect on suff. That is how others can help you troubleshoot. We can throw stuff out all day long and have you check the entire damn car, but if you give others better info, then it makes the troubleshooting effort go alot easier. Don't worry, I am not directing this at anyone in specific. that should be common practice for everyone when diagnosing a problem.
Jason
02-22-2006, 10:28 AM
#13
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the motors been washed before, but not in awhile, so theres no water in there. i barely made it home from school today, the car was buckin and cuttin out like crazy. when i was on the highway and sometimes when i would give it some gas, nothin would happen. it would just slowly deccelerate, as if it were in neutral. and if im at idle and rev it up say to like 4k, it would only rev to 3, and bounce up and down, almost like iacv, but it feels like a restriction somewhere. i have to give it very light gas off the line cuz if i give it any more than half throttle, the motor will cut out, unless i let off and get back on the gas. i rely on this car for school and work, and if i cant solve it soon, im about to say **** it and take it to a shop or the dealership, cuz i rely on it too much.