Tuner won't tune car cause of Po103 ?
06-06-2008, 10:10 AM
#41
PO103 means you are exceeding the MAF freq limit table in the PCM, especially if it's happening at 5800 rpm on a 98 which has a smaller MAF table to begin with so it doesn't sound like a bad MAF to me. Easy fix in the tune and that's just part of the tuning process. Fluctuating idle could be a ton of different things though.
06-10-2008, 05:40 PM
#46
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my car had a flucuating idle on cold start up. after 30-60 seconds and an occasional stall it would find its idle. thats with a tune. now 2500 miles later its time for a new shortblock! lol
no codes though, just a bad, very bad number 7
no codes though, just a bad, very bad number 7
06-10-2008, 08:17 PM
#47
Well, I have checked everywhere for vacuum leaks and I have very steady 22" at idle. I can not understand how I could posibly still have a vacuum leak although my tuner assures me of this. ??? It has got to be my MAF, well, I hope that is what it is!
Last edited by 9t8z28; 06-10-2008 at 08:22 PM.
06-16-2008, 05:31 PM
#58
I just took the car out for a spin and the SES light came on again. It is PO103 again and after some more hard pulls, PO171/ and PO174 pop up. But the later two codes have to be caused by PO103. The car idles better and seems to have more power also. I guess Harris Speed Works is unable to tune it so now I think I am going to get Race Proven Motorsports to tune it for SD.
Last edited by 9t8z28; 06-16-2008 at 08:28 PM.
07-01-2008, 05:57 PM
#59
I just got back from the dyno tune by Race Proven Motorsport, and WOW, these guys did an awesome job! They knew exactly what to do, and did it right the first time!
Thanks Fran! The extra 50 horse that was missing from the tune is the best part!
Thanks Fran! The extra 50 horse that was missing from the tune is the best part!