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07-21-2018, 11:29 AM | #1 | |
AF Newbie
Join Date: Jan 2006
Location: Saginaw, Michigan
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Need help with 2005 GP GXP
Hi guys! I need some help on a major issue I'm having with my 2005 Grand Prix GXP 5.3L. Let me start off with a bit about myself. 20+ year state certified master mechanic. Ive been around the block more than a few times. This is my personal car and right now, I'm at a loss.
Lets go back about two years ago. One day, I suddenly lost my cruise control, tap shift and my compass now says "CAL". I needed to upgrade the TCM and PCM anyways so I had a custom tuning company flash me performance modules for the car, in hopes it would take care of those issues. I was wrong but the problems weren't that big of a deal. Lets fast forward to last weekend. I was driving along during a country drive and suddenly I noticed my air conditioning went warm. I thought "oh great, just what I need in this heat we have been having". I was less than 1/4 mile from my destination so I just wrote the AC issue off for that moment in time. A couple hours later, I was ready to head home and I remote started my car. It fired for about 5 seconds and shut off. I thought that was odd, its never done that before. I got into the car, and it started with the key. I started to head down the road and it was shifting VERY firmly and my CEL was on. Great, now the trans is in limp mode because of a stored or active engine code. I get it home and put it on the code scanner and it only shows a P0102 ( Mass or Volume Air Flow Circuit Low Input). I cleaned the MAF with MAF cleaner, reset the code and tried it again. Same results with a CEL and trans in limp mode. I put on my AC manifold gauges and the pressures were right where they are supposed to be to allow the activation of the AC clutch, but it wasnt activating. I thought maybe my MAF really took a dump and went and picked up a new one. Installed it and disconnected the battery for a couple hours. Hooked the battery back up and took it for a ride. Still no AC, trans still in limp mode and eventually the P0102 code was triggered. I checked over most engine electrical connections, nothing visually obvious wrong. I'm throwing this out here in hopes to pick someone's brain for ideas on what the heck could be going on with this car. Thanks in advance for your help! |
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07-28-2018, 04:25 AM | #2 | |
AF Newbie
Join Date: Jan 2004
Location: michigan, Michigan
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Re: Need help with 2005 GP GXP
Try disconnecting your maf and see how it runs. If that works replace it with the oem that came on the car.
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