Tuning HELP!!
Thread Starter
Teching In
Joined: Sep 2017
Posts: 34
Likes: 4
From: Edinboro, PA
Tuning HELP!! Hey guys, I need some help with my tune. I am attaching my Scan File from HPTuners. Basically, I started my car up last night after driving for about 10 miles, when I cranked it it popped and didnt start. So I hit the starter again and it started up but was low idle. So I reved it up and th idle picked up to like 1200. It has previously idled around 700rpm. The cars idle nver went down. So this morning I saw that one of my vaccum caps had popped off, so I reinstalle it but that didnt change anything. So I took it for a drive and scanned it at the same time. Now, I'd like to preface this by saying I took the car to a tuner when I first got it going and it has been running good ever since. But now that Im looking at the scan I am kind of concerned about a few things; Spark timing, TPS %.
Please help. BTW, 2002 LQ4 stock motor. DBC. LS1 intake. 36 lb/hr injectors.
Please help. BTW, 2002 LQ4 stock motor. DBC. LS1 intake. 36 lb/hr injectors.
Thread Starter
Teching In
Joined: Sep 2017
Posts: 34
Likes: 4
From: Edinboro, PA
I pulled my Tune File to share just in case it can help. When I popped the hood I found another loose vacuum line, this on was the PCV was loose, but that didnt really fix the idle. Although it did bring the LTFT down from 25% to 9%-15%.
Thread Starter
Teching In
Joined: Sep 2017
Posts: 34
Likes: 4
From: Edinboro, PA
Just wanted to say that I was able to get the idle issue corrected. Turns out that the TCI trans controller TPS ground was interfering with my PCM TPS ground. So I disconnected the TCI wiring and only used the reference signal. Everything works the way it is supposed to now.
Also, the fuel trims were messed up because I did in fact have a vacuum leak which I corrected as well.
Also, the fuel trims were messed up because I did in fact have a vacuum leak which I corrected as well.
