Miss-fire related with the MAF
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From: San Juan Puerto Rico, Look it up it's in the Caribean
Miss-fire related with the MAF
Hi, Guys
I Have the a miss-fire problem, the car is missing in low rpm's. I saw the gas coming out from the exhaust. But if I disconnect the MASS SENSOR the miss disappears.
Also, I clean the MASS SENSOR with a MAF cleaner. But nothing happens.
I would damage other part if I run the car without the Mass Sensor ???
I Have the a miss-fire problem, the car is missing in low rpm's. I saw the gas coming out from the exhaust. But if I disconnect the MASS SENSOR the miss disappears.
Also, I clean the MASS SENSOR with a MAF cleaner. But nothing happens.
I would damage other part if I run the car without the Mass Sensor ???
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Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
The engine will run OK in speed-density mode, which is what the PCM defaults to lacking the signal from the MAF. With limited mod's, the stock speed-density tuning will be OK. You don't appear to have much more than the CAI and headers, so you'll probably be OK in speed-density. With more radical mods, it could cause problems.
Why not fix the problem? Swap in an MAF that you know works. If that doesn't fix things, check the wiring harness. Make sure you have +12V at the pink wire in the harness.
Suggestion - Include basic info about your car in the "signature" field. At least add the year of the car. Not all years of the LT1 are the same, and lacking the basic info like the year, it may make it more difficult for people to help you.
Why not fix the problem? Swap in an MAF that you know works. If that doesn't fix things, check the wiring harness. Make sure you have +12V at the pink wire in the harness.
Suggestion - Include basic info about your car in the "signature" field. At least add the year of the car. Not all years of the LT1 are the same, and lacking the basic info like the year, it may make it more difficult for people to help you.
Thread Starter
Registered User
Joined: May 2006
Posts: 86
From: San Juan Puerto Rico, Look it up it's in the Caribean
The engine will run OK in speed-density mode, which is what the PCM defaults to lacking the signal from the MAF. With limited mod's, the stock speed-density tuning will be OK. You don't appear to have much more than the CAI and headers, so you'll probably be OK in speed-density. With more radical mods, it could cause problems.
Why not fix the problem? Swap in an MAF that you know works. If that doesn't fix things, check the wiring harness. Make sure you have +12V at the pink wire in the harness.
Suggestion - Include basic info about your car in the "signature" field. At least add the year of the car. Not all years of the LT1 are the same, and lacking the basic info like the year, it may make it more difficult for people to help you.
Why not fix the problem? Swap in an MAF that you know works. If that doesn't fix things, check the wiring harness. Make sure you have +12V at the pink wire in the harness.
Suggestion - Include basic info about your car in the "signature" field. At least add the year of the car. Not all years of the LT1 are the same, and lacking the basic info like the year, it may make it more difficult for people to help you.
Well I checked the pink wire in the harness and it has 12v.
Then disconnect the battery for a few minutes and connect the maf, connect the battery again. The car run's great for about 5 min and then come back missing again. But when the ses light come on I scanned and they says that can not comunicate with the pcm.
I dont know what to do ...
Thread Starter
Registered User
Joined: May 2006
Posts: 86
From: San Juan Puerto Rico, Look it up it's in the Caribean
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Might want to take the time to find out if you were using the correct scanner. If it will scan OBD-I, you may need to use the 12-pin connector and jumper it as shown on Shoebox's site:
http://shbox.com/1/xraycable.jpg
http://shbox.com/1/xraycable.jpg
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Joined: Aug 2007
Posts: 305
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