DTC'S AND MAFT?
Thread Starter
Teching In
Joined: Nov 2001
Posts: 24
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From: palatine,IL USA
DTC'S AND MAFT? Shortly after installing a MAFT on my car I've been getting a PO171 and PO174 system too lean DTC. The MAFT is set at 0-base and 2% lean at WOT. When I try to start from scratch (0-base and 0-WOT) the Ltrims never change. I've tried 5%,10% etc. and the Ltrims stay at a constant 25%. Before the translator, the car never had this code. If I try to lean it out at WOT, my O2's read 930-955, the same as before the translator. 2%,4% etc. did not show any change with the O2 readings. Is it possible that I have a bad MAFT? Or is it something that I'm doing wrong? Any help would be greatly appreciated.
Thread Starter
Teching In
Joined: Nov 2001
Posts: 24
Likes: 0
From: palatine,IL USA
Re: DTC'S AND MAFT? No actually, when I disconnected it, I still got the DTC. My IAC pintle position number was at 60 when the car was fully warmed up. It was in the 20's the last time I checked it about a month ago. Is it possible that there is a problem with that? Also when making adjustments to the MAFT, do those changes instantly show up on autotap, or does it take some time?
Re: DTC'S AND MAFT? You have a stock ported MAF on the car or after market MAF ends?
Kimh@vankampen.com had that happen like two years ago.
I think you need to add fuel. 25% means that the pcm is maxed out as far as compensating.
Kimh@vankampen.com had that happen like two years ago.
I think you need to add fuel. 25% means that the pcm is maxed out as far as compensating.
Thread Starter
Teching In
Joined: Nov 2001
Posts: 24
Likes: 0
From: palatine,IL USA
Re: DTC'S AND MAFT? Hey John, its Chris (gold car). When I first put the translator on, everything was fine. I drove all the way to 41, and made a few passes without any DTC. Suddenly on the return road, there it was. I think there was something that trggered this whole episode.
