engine running too lean ??
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Freshman User
Joined: Apr 2004
Posts: 38
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From: Long Island, NY
engine running too lean ??
just a question..does anyone has the problem with their check engine light..i had it scanned and say engine running too lean..
i did install cold air intake. after couple hundred miles the check engine light came on..
so i was wondering..if thats a bad maf ? iac ? i also did replaced the oxgen sensor in cat conv..
what should i do ..
let me know if anyone has the problem and got it fix..
i want the truck to be fix before i can tow my new camper..
thanks
john
i did install cold air intake. after couple hundred miles the check engine light came on..
so i was wondering..if thats a bad maf ? iac ? i also did replaced the oxgen sensor in cat conv..
what should i do ..
let me know if anyone has the problem and got it fix..
i want the truck to be fix before i can tow my new camper..
thanks
john
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Freshman User
Joined: Apr 2004
Posts: 38
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From: Long Island, NY
Originally Posted by Sturge
Details? Year? Engine? Miles?
the truck itself is 4.6 ltr.. 86,000 and model is XLT..
i had replaced the pcv, gas filter, spark plug and the wires..
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Freshman User
Joined: Apr 2004
Posts: 38
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From: Long Island, NY
Originally Posted by Cobra-Master
What type of CAI did you install? Did you oil the filter yourself, and are you sure the filter wasn't over oiled? An over oiled filter can cause an MAF to do very weird things...
no brand just the complete set with 2 hose.. no maf..i use oringinal maf off old air filter..
think maf is bad some other say it the hose??
john
ps.. thanks for replying..
Junior User
Joined: Feb 2004
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blueexpend, what I'm saying is that if you over oiled your high flow cotton filter in your CAI, the extra oil can blow through the filter and contaminate your MAF wires. This will cause all kinds of havoc. There are ways to clean the MAF wires, it might be worth a try.
Thread Starter
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Freshman User
Joined: Apr 2004
Posts: 38
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From: Long Island, NY
Originally Posted by Cobra-Master
blueexpend, what I'm saying is that if you over oiled your high flow cotton filter in your CAI, the extra oil can blow through the filter and contaminate your MAF wires. This will cause all kinds of havoc. There are ways to clean the MAF wires, it might be worth a try.
what kind of cleaner should i try.. think maybe it was the problem ??
no idea.. thanks
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Joined: Feb 2004
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I've never cleaned MAF wires / sensor before... Do a search and maybe someone has addressed this issue before. I know GM has started a policy to deny MAF related warranty issues on cars that have K&N filters due to the oil contamination problem. Some folks over oil their filters, and then contaminate their MAF as a result.
You might try checking your AF ratio on a dyno machine. Do you hear any knocking from the engine? If you are running lean, you will typically hear a knock, especially if you are using 87 octane fuel.
You might try checking your AF ratio on a dyno machine. Do you hear any knocking from the engine? If you are running lean, you will typically hear a knock, especially if you are using 87 octane fuel.
Last edited by Cobra-Master; Apr 20, 2004 at 06:09 PM.
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