Bad map sensor readings
Thread Starter
Staging Lane
Joined: Mar 2018
Posts: 57
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Bad map sensor readings Hello I have a gen 3 5.3 turbo cam on e85. Ive been having a problem with my map sensor readings its off a 2005 cobalt ss what I did was get the data a 05 cobalt ss and enter it into my tune and it seems with the slightest throttle kpa is going through the roof any ideas what this could be??
Launching!
Joined: Jan 2018
Posts: 283
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2 problems, your MAP data is wrong as you're logging 133KPA with key on engine off. This should be 100KPA unless you're in an area with lower barometric pressure.
plus, your IAT sensor is open circuit. that will through air mass and fueling calculations off by a mile.
if you have a 2 bar Delphi sensor set linear to 200KPA and off set to 10.33KPA. use the scanner to make sure the MAP records 100KPA with key on engine off.
do that plus install an IAT sensor and use the scanner to check its reporting accurate data and you'll be good to go
plus, your IAT sensor is open circuit. that will through air mass and fueling calculations off by a mile.
if you have a 2 bar Delphi sensor set linear to 200KPA and off set to 10.33KPA. use the scanner to make sure the MAP records 100KPA with key on engine off.
do that plus install an IAT sensor and use the scanner to check its reporting accurate data and you'll be good to go
Thread Starter
Staging Lane
Joined: Mar 2018
Posts: 57
Likes: 0
Yeah I was doing some testing so I had the iat unplugged, and no I said it was from a 05 Cobalt ss so I've tried the stock settings and u also tried .200 and 10.33 neither worked. I'm not too sure but I'm at 5000 fr altitude so what should be the key on engine off reading
Thread Starter
Staging Lane
Joined: Mar 2018
Posts: 57
Likes: 0
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