Is initial TPS reading of 12.2 correct?

psdforever

Member
Jan 21, 2015
18
0
SW Indiana
I now have the dreaded high idle issue.

1999 Disco 1 SD

After a long battle with grounding and dash Temp guage issues I had everything fixed and running good for about a week. Went out and started disco in morning and high idle. I checked the MAF and it fell apart in my hand. I replaced it with upullandpay donor MAF and still have high idle.

I found that I did not replace the air filter box temp sensor plug after fixing the ground problem a week ago. I plugged that back in and still high idle. About 1250 RPM.

Scanned for codes. Found usual O2 codes, but P0113, Intake air temp sensor 1 circuit high input was new.

TPS is reading 12.2 upon startup. ECU Coolant temp is reading and working as normal.

Did I hose the Adaptive values by driving around with the air temp sensor unplugged?

I have the GEMs android app downloaded, but I'm waiting on my OBDLink<sup>?</sup> LX dongle to arrive on Wednesday to try resetting the adaptive values.

Is the ODB II reading of 12.2 TPS normal on startup? It does increase it I press the throttle as shown on the ODB reader. MAF is running between .02 and .01 so I think it is working.
 

Knightspirit

Well-known member
Sep 22, 2019
251
84
Mount Shasta, CA
I just fixed my idle issue as well by resetting the adaptive values - had to find my wife's old Samsung (we're all iPhone now) and charge and reset it so I could download the GEMs ECU Utility. Did that and reset the values using the software - and Voila! Idles perfectly. Gonna keep that old phone in the truck just in case I ever need that app again!