Map sensor reading Wrong
- Thread starter stl_ty
- Start date
WyoSyclone
Active member
Re: Map sensor reading Wrong
Go into DM "set up", 'display units', and set MAP Calibration to '2-3 bar map'.... see if that does it. I assume you're running a 3-bar map and wideband.
Go into DM "set up", 'display units', and set MAP Calibration to '2-3 bar map'.... see if that does it. I assume you're running a 3-bar map and wideband.
stl_ty
New member
Re: Map sensor reading Wrong
But the truck is not running right it has a lil high idle and doesn't go right back to idle after a rev.
But the truck is not running right it has a lil high idle and doesn't go right back to idle after a rev.
WyoSyclone
Active member
Re: Map sensor reading Wrong
Regardless, one of your gauges is wrong.... you need to get to the bottom of that first. It could be a bad MAP sensor, or could be a small leak at the MAP. Do you have another MAP you could try? Check those vac lines.
If you have a mighty vac, remove the vac line from the intake that feeds the MAP. Evacuate that line down to 18hg then start the truck and see if it idles fine. If so, probably a vac leak, if not probably a bad MAP.
Regardless, one of your gauges is wrong.... you need to get to the bottom of that first. It could be a bad MAP sensor, or could be a small leak at the MAP. Do you have another MAP you could try? Check those vac lines.
If you have a mighty vac, remove the vac line from the intake that feeds the MAP. Evacuate that line down to 18hg then start the truck and see if it idles fine. If so, probably a vac leak, if not probably a bad MAP.