Could a cracked/split MAF sensor-to-intake boot cause code p0100?
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Joined: Dec 2018
Posts: 17
Could a cracked/split MAF sensor-to-intake boot cause code p0100?
So I have a 99 5spd I bought for $400 with 180k on the clock. Was only running on 4 cylinders when I bought it, and once I replaced the bad coil packs with the ones the p/o left in the trunk, the car ran great for a while. I had an immobilizer issue that kept the car from starting. This is a backup car so I let it sit for months until a friend bypassed the problem and got it running again. Once it was running, however, the car kicked the codes p0100 and p1335, and it won’t rev past 3k. We were discussing this in a different thread, but I believe it was pruned. JvG had mentioned the limp mode kicking in and limiting the revs is likely maf related, and the code is evidence of this. I went and took a look and the boot from the maf housing that runs to the intake manifold is cracked/split. Would this cause my problems? Obviously it needs to be replaced, but am just wondering if it is causing the CEL. Thanks for any advice.
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Joined: Dec 2018
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Joined: Jan 2008
Posts: 268
From: Dallas, TX
If you're handy with a soldering iron you may be able to repair your MAF rather than replace it. https://maxima.org/forums/4th-genera...lem-fixed.html
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Joined: Dec 2018
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I’m not exactly sure either, I wasn’t there for the fix. It would turn over and wouldn’t start. I checked all the usual suspects and ran a scanner and got nothing. My friend said it had an aftermarket security system that was triggering the immobilizer and wouldn’t allow it to start. Starts now, just idles at around 1k and won’t rev past 3k.
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Joined: Oct 2012
Posts: 2,974
From: Portland, Oregon
The mafs job is to sense how much air is entering the engine. The ecu uses that information to sense how much gas should be injected
A split boot let's in unmetered air. That causes a lean mixture. Which can cause misfire and poor idling.
I'm not totally sure, but perhaps a leaking boot could also cause a maf code to pop up.
So I would start by going to the wrecking yard to get a good boot. Install that. Might as well try the
CRC Maf spray for the maf. Then turn off the codes if you can. Otherwise just drive the car. That code might go away.
A split boot let's in unmetered air. That causes a lean mixture. Which can cause misfire and poor idling.
I'm not totally sure, but perhaps a leaking boot could also cause a maf code to pop up.
So I would start by going to the wrecking yard to get a good boot. Install that. Might as well try the
CRC Maf spray for the maf. Then turn off the codes if you can. Otherwise just drive the car. That code might go away.
Last edited by JvG; Dec 12, 2018 at 07:01 PM. Reason: Additional comment added.
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