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??

 

Any Ideas???? what map sensor are you guys running and with what settings I might try and just get another one

 

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

 

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

 

internet says 84KPA barometric pressure.

what map sensor do you have?

 

Its the stock map sensor from a 05 cobalt ss I already tried using the settings from a stock 05 chevy cobalt ss

 

I'm thinking of just running another map sensor, whats a good known 3 bar map sensor 3ppl run

 

Lets try this again....

Whats the PN on your map sensor. you probably dont have what you think it is.

 

I thought the Cobalt was a 2.5bar sensor. If you input data from a 2bar sensor it will be incorrect.

 

I bought it from a parts store so it should be for what I asked, and I input the data from the same year make and model