Only time I have ever seen those 2 codes by themselves at the same time has been if its a bad wiring issue or the ECM going south after a smoke switch had been on the truck. Get a volt meter and check your voltage at the Map sensor, should be 5.0 volts with no boost. if its reading higher than 5, change or clean map sensor and recheck.

There is a write up on how to check your heater relays too, let me try to find it.

 

Would appreciate it much was also told that the map sensor code was being thrown due to high boost pressure im running 70psi, i believe it was you that told me that but i may be mistaken but i would appreciate the write up on the heater relays, oh and that map sensor code has been there for almost a year now

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nah, wasnt me who told you about the 70 lbs and the code. Factory ECM sets that code to trip at any pressures higher than 25. The reason it doesnt trip on most modded trucks is because people are running boost fooling boxes, aka the juice, TST, ADR etc. These boxes intercept the boost signal from the map before it gets to the ECM and tricks the computer thinking it is only at 18-25(varies depending on the box) when in fact its got much more than that. The factory also sets the ECM to begin cutting back on fuel at 18 psi which is why a boost fooler is needed if you are higher than that in order to hit max power potential.


still looking for that grid heater write up.

 

So should i get a boost fooling box? Im not feeling any lack of fuel thats for sure

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I checked the relay today and the small wires on it are loose, thing seems like a pain in the rear to replace

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How much does a grid heater cost. I don't have one in my truck.

 

Not sure id get one from a junk yard, the wires are loose on my relay im gonna try ckeanning and hooking everything back up and see if it helps

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