Adjustable Map Sensor and Emissions

3XJFamily · May 2, 2006

Running a 95 HO that for all purposes is new. 500 miles on the long block, all new sensors, new CCV, fresh radiator, etc. Where I messed up is with the injectors - I put in 21lb Accel and didn't take into account the lower PSI rating, that coupled with the Banks header / hi-flow cat and muffler have it running lean (white plugs and O2 sensor) and way too hot - especially at idle.

So after comparing the cost of new injectors, an adjustable fuel pressure regulator, and an adjustable map sensor, I built the adjustable map sensor.

Can anyone with experience suggest a starting voltage? I'll head in this month for emissions testing - they do an idle test, and a 2500 RPM test - what would be ideal readings?

rehab · May 2, 2006

3XJFamily said:
Running a 95 HO that for all purposes is new. 500 miles on the long block, all new sensors, new CCV, fresh radiator, etc. Where I messed up is with the injectors - I put in 21lb Accel and didn't take into account the lower PSI rating, that coupled with the Banks header / hi-flow cat and muffler have it running lean (white plugs and O2 sensor) and way too hot - especially at idle.

So after comparing the cost of new injectors, an adjustable fuel pressure regulator, and an adjustable map sensor, I built the adjustable map sensor.

Can anyone with experience suggest a starting voltage? I'll head in this month for emissions testing - they do an idle test, and a 2500 RPM test - what would be ideal readings?

http://jeepbarracks.com/modules.php?name=News&file=article&sid=18
this should help

titan4u2c · May 2, 2006

Hey 3XJ, please let me know how that adj map works out if you build it and what setting you try to get it to run right will ya. Sounds like my prob after installin a high flow cat and flowmaster. Wont idle or run properly and can't figure out that homebrew sensor deal. Thanks.

Dr. Dyno · May 3, 2006

3XJFamily said:
Running a 95 HO that for all purposes is new. 500 miles on the long block, all new sensors, new CCV, fresh radiator, etc. Where I messed up is with the injectors - I put in 21lb Accel and didn't take into account the lower PSI rating, that coupled with the Banks header / hi-flow cat and muffler have it running lean (white plugs and O2 sensor) and way too hot - especially at idle.

So after comparing the cost of new injectors, an adjustable fuel pressure regulator, and an adjustable map sensor, I built the adjustable map sensor.

Can anyone with experience suggest a starting voltage? I'll head in this month for emissions testing - they do an idle test, and a 2500 RPM test - what would be ideal readings?

Start at 5.3v and if necessary, go up in 0.1v steps until the plugs start to look brown instead of white.

Adjustable Map Sensor and Emissions

3XJFamily

NAXJA Forum User

rehab

NAXJA Forum User

titan4u2c

NAXJA Forum User

Dr. Dyno

NAXJA Forum User

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