986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Idling/ stalling, no pedal response, weird ecu readings

blue62 · 03-28-2023, 07:38 PM

If you go back to my first post to you.....
a possibility of a common ground issue was mentioned..
These cars have different 14 ground points...
I see you got it fired up by running a jumper ground to the MAF.
I think the MAF grounds via the ECU but I am not positive.
The MAF is also two sensors in one.....
One measures air temp. the other measure air mass.
I do not know if they both ground via a common ground or not.
A wiring diagram would show you.
If the MAF does ground via the ECU you have and ECU ground issue.
If you have a ground point issue chances are your going to have further issues with the car.
You need to go through your ground points and the ECU ground point to avoid that possibility.

03-28-2023, 07:38 PM	#22
blue62 Registered User Join Date: Aug 2018 Location: Woodland Wa Posts: 1,300	If you go back to my first post to you..... a possibility of a common ground issue was mentioned.. These cars have different 14 ground points... I see you got it fired up by running a jumper ground to the MAF. I think the MAF grounds via the ECU but I am not positive. The MAF is also two sensors in one..... One measures air temp. the other measure air mass. I do not know if they both ground via a common ground or not. A wiring diagram would show you. If the MAF does ground via the ECU you have and ECU ground issue. If you have a ground point issue chances are your going to have further issues with the car. You need to go through your ground points and the ECU ground point to avoid that possibility. Last edited by blue62; 03-28-2023 at 08:25 PM.