Engine/Transmission (1998.5 - 2002) P0237 and replaced MAP Sensor--Looking for help

[KOREDISH]

Take a look at my sig for truck stats. I recently had the DTT transmission and the Mach 2 injectors put in, combined with my DDTTPM, which I previously owned.



Edit: BTW FP is 14psi at idle and 8-10 WOT.



Original Problem: driving steady at 70mph, then I would push the accelerator down, at which point the truck would fell like it was missing.



Test: Take box off. Problem seems to go away.



DD exchanges the box for me no problem.



Then I clean and dielectric all connections, and plug new box in. Problem doesn't go away and now the MIL illuminated (check engine light), which ends up throwing the P0237 DTC.



I do research and it seems the MAP is to blame. So I replace MAP, keep box and boost elbow off, let sit with battery cables undone for hour. Reattach and recalibrate APPs. (actually I've done the APPs recalibrate twice now)



Problem Now: P0237 Code will not erase and accelator feels very sluggish, at times seems delayed response.



Does the APPs throw codes? Any ideas? How do I test the voltage of the MAP?



Thanks



Dish

 

[ToolManTimTaylor]

P0237 (M) Map Sensor Voltage Too Low MAP sensor voltage input below the minimum acceptable

voltage



Is the Boost fooler plugged in? and How is the pump taped?



Edit: all intercooler boots are fine?

 

[KOREDISH]

Boost fooler is off and the DDTPM is an EZ, so no pump tap.



Intercooler boots?



Dish

 

[Sticks]

Originally posted by KOREDISH

Intercooler boots?



Dish

Follow the piping from the turbo to the intercooler, and the intercooler to the intake manifold. The 4 rubber boots can come loose or develop holes (primarily the lower ones attached to the intercooler - gets cut buy the fender) You may want to loosen and re seat the hoses and clamps, or at least the clamps, and feel for tears in the boot.

 

[ToolManTimTaylor]

Originally posted by KOREDISH

Boost fooler is off

Bingo The boost your Mach's are creating ase putting you over 20 LBS (At which the ECM DEFUELS by default) Without the fooler your truck is defueling.