low boost and popping exhaust
06-07-02, 03:03 PM
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low boost and popping exhaust
I was driving my 93 the other night and got on it. it pulled fine until about 1000 before red line then it started backfiring. the car runs fine under normal driving conditions, but as soon as in builds about 5psi of boost it kicks and sputters and pops. I checked for vacume lines that might have come off, but there are none. I have reset the computer several times but no difference. When the car acts up the A/F guage shows rich. Any help would be great and thanks for any responses
06-11-02, 11:30 PM
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you guy seem to be no help at all, you guys will reply back to stupid things like "what color should i paint my car," but can not or will not help out with a serious problem/question. if you do not know the answer or can't help me out at least give me then name of sombody that can.
06-11-02, 11:37 PM
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firt of all stop spazzing, and why do people post when they have nothing to say about what the guy is asking?
a little more info coudl help are u sure its at 5k or is it after 4500rpm and are u gettign 5 psi after 4.5-5k? and is it boostign all 10 before that? is your car modded? and throw away that a/f gauge it doesnt do anything..
a little more info coudl help are u sure its at 5k or is it after 4500rpm and are u gettign 5 psi after 4.5-5k? and is it boostign all 10 before that? is your car modded? and throw away that a/f gauge it doesnt do anything..
06-12-02, 07:38 AM
#7
Check your Boost Sensor, it's mounted to your firewall on the driver side a little toward the center from the brake booster. There is a hose and a filter that should connect to a nipple on the bottom. If this is off your car will run like crap. I assume if it runs fine under normal conditions, this is not the case, but worth a look. Other than that, check your plugs/wires. That's about all the help you can get with the info you provided, list mods and give more details on your acceleration/boost. It could potentially be a clogged precat and/or main cat. Good luck.
Richard
Richard
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06-12-02, 09:11 AM
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Originally posted by James 007
you guy seem to be no help at all, you guys will reply back to stupid things like "what color should i paint my car," but can not or will not help out with a serious problem/question. if you do not know the answer or can't help me out at least give me then name of sombody that can.
you guy seem to be no help at all, you guys will reply back to stupid things like "what color should i paint my car," but can not or will not help out with a serious problem/question. if you do not know the answer or can't help me out at least give me then name of sombody that can.
Okay, check all the intercooler couplings. My FD did this until I "fixed" the hose that popped off going to the throttle ...
Other than that, with all the information that you've given us, I'm clueless. What have you checked?
06-12-02, 09:11 AM
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Originally posted by James 007
you guy seem to be no help at all, you guys will reply back to stupid things like "what color should i paint my car," but can not or will not help out with a serious problem/question. if you do not know the answer or can't help me out at least give me then name of sombody that can.
you guy seem to be no help at all, you guys will reply back to stupid things like "what color should i paint my car," but can not or will not help out with a serious problem/question. if you do not know the answer or can't help me out at least give me then name of sombody that can.
Okay, check all the intercooler couplings. My FD did this until I "fixed" the hose that popped off going to the throttle ...
Other than that, with all the information that you've given us, I'm clueless. What have you checked?
06-12-02, 11:59 PM
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im not spazzing, it just seems to take a note like the one i wrote to get any kind of help. I have no CAT, the line to the map sensor is on, all the intercooler couplings are on and tight, it runs fine if you bring it up to speed, 7000rpm, with no real boost, over 5 psi, and runs fine other then that. Could it be a fuel filter problem? I was thinking once the computer sees boost it kicks in the secondary injectors. maybe?
I have the M2 stage 3 kit with a downpipe, greedy exhaust, big m2 intercooler, MSD spark plug wires that i put on about 5ooo miles ago. By the way thanks for all of your responses, somthing is better then nothing at all.
I have the M2 stage 3 kit with a downpipe, greedy exhaust, big m2 intercooler, MSD spark plug wires that i put on about 5ooo miles ago. By the way thanks for all of your responses, somthing is better then nothing at all.
06-13-02, 12:39 AM
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Originally posted by James 007
im not spazzing, it just seems to take a note like the one i wrote to get any kind of help. I have no CAT, the line to the map sensor is on, all the intercooler couplings are on and tight, it runs fine if you bring it up to speed, 7000rpm, with no real boost, over 5 psi, and runs fine other then that. Could it be a fuel filter problem? I was thinking once the computer sees boost it kicks in the secondary injectors. maybe?
I have the M2 stage 3 kit with a downpipe, greedy exhaust, big m2 intercooler, MSD spark plug wires that i put on about 5ooo miles ago. By the way thanks for all of your responses, somthing is better then nothing at all.
im not spazzing, it just seems to take a note like the one i wrote to get any kind of help. I have no CAT, the line to the map sensor is on, all the intercooler couplings are on and tight, it runs fine if you bring it up to speed, 7000rpm, with no real boost, over 5 psi, and runs fine other then that. Could it be a fuel filter problem? I was thinking once the computer sees boost it kicks in the secondary injectors. maybe?
I have the M2 stage 3 kit with a downpipe, greedy exhaust, big m2 intercooler, MSD spark plug wires that i put on about 5ooo miles ago. By the way thanks for all of your responses, somthing is better then nothing at all.
06-14-02, 01:02 AM
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This popping is either one of two things. Either its not getting enough gas or the turbos arent spooling up correctly. I have a setting on my PFC where I can adjust the boost level in bars and also the percent at which turbos come on. If i put turbos to come on too late or too early, it gives off a loud pop like a cut in fuel....
Its just some info with my experience....
Its just some info with my experience....
06-15-02, 11:04 PM
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do any of you guys know how to test a bad map sensor? No error codes are showing so who knows
what would be the best way to check fuel pressure at wot?
thanks again for the help
what would be the best way to check fuel pressure at wot?
thanks again for the help
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