i've got a 2000 with cyl 3 , and a cyl 1 misfire. Also runs rough at idle and i get terrible mileage on the highway, i mean like 14mpg. Use to get 19 in my 89. So back to the question , i have a scan tool and the map read 1.27 - to 1.31 inHg @ idle to me that seems wrong, im a mechanic and am only use to maf sensors , so any info will help

 

Don't know if the ScanGauge MAP display is in inHg but it shows MAP at 5.2 at almost normal operating temp.

 

thnx that does and dosent help, scan gauge reads in psi or kpa depending on your setting, but if yours is set to psi i have a bad map but if its set kpa then im fine. Im gonna plug into another buddies jeep with a 4.0 and see what his says. Thanx for your help

 

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