03 Map sensor troubles.

[Smokey 01]

I was cruising along last week running stock fueling and about 28 psi of boost when I losty power and got a CEL. I checked codes and had a 107 Map sensor low. I checked my attitude and it was reading low and working as it should. I bought a new map from cummins and it worked great for 10 minutes and now it is back to the same syptoms but does not read the same boost. It either reads 0 at idle or 27-28 with any throttle. I'm thinking it may just be another bad sensor but I don't know.

Thanks for any input.

BTW I tried unhooking the Juice and it made no difference, also now I can't clear the code it is stuck in the computer.

 

[Smokey 01]

I am wondering if I have to get a code 107 cleared at the dealership? On my diablo it is under permannet codes and I cannot clear it. I think my Juice is bad and it is sending a bad signal to the computer and now my truck is stuck in safe mode. It runs fine below 2000 rpm's but is a gutless pig above that. Has anybody else had this problem.

Thanks

CG

 

[Smokey 01]

Dealership says they "think" you have to program for the new MAP. They say it will take an hour to an hour and a half. I don't want to pay $100 for smething that will take 15 minutes to complete and their lack of knowledge really irritates me.

 

[Diesel Power]

Dealership says they "think" you have to program for the new MAP. They say it will take an hour to an hour and a half. I don't want to pay $100 for smething that will take 15 minutes to complete and their lack of knowledge really irritates me.

something about that dont sound correct, i would check around

 

[drewRoberts]

when doing some MAP mounted resistor mods I came across a similar code. I was just trying to get a bit more fuel cheap :-laf



anyway, yes it was full on below 2K, but above 2K it just wouldnt run right. pulled off the resistors and she ran the same way for about a mile, then all of a sudden things kicked back in and the code went away.



I was toying around with some low ohm resistors 36ohm all the way to 24ohm just to see what would happen. puter didnt like the 24ohm

 

[Smokey 01]

I was doing some live data with my predator and it is working correctly. Boost goes from about 12psi ( atmospheric pressure) to around 32 psi which would correspond to the actual 20 psi I see on my boost gauge. I have driven it some but it doesn't want to clear. I am wondering why this sensor would have to be programmed, but the 12 psi of atmospheric pressure seems a little low. i don't know. The shop can't get it in until next thursday so I'll keep driving my 2000 rpm cummins until then to see if it clears.

 

[nickleinonen]

which sensor are you changing? my truck popped a p0107 code a while back, and it may be called map sensor by obd2 standards, but it is the intake air temp/baro sensor in the piping pre turbo on our engines. .

 

[Smokey 01]

I never thought of that sensor telling the computer that the baro pressure is higher than the actual thus cutting down on boost. I will have to check into it. Thanks

 

[Smokey 01]

I had forgotten about the dealership breaking the connector for my baro pressure sensor. It had come unplugged far enough to lose connection, so I actually could have fixed it in 3 seconds had I known.

thanks again for everybodies responses

 

[byoslandry]

Map Sensor

Hey guys

Atmospheric pressure at sea level is 14 psi.

Take care

Byron