Ok, now I have the MpX 62mm throttle body on the car,,,,,,,,,,,,,,,,,,,,,,,,,still waiting for my Stage 1 computer from Howell automotive ( 4-6 weeks delivery time, my *** ) hopefully I'll have it by XMAS but anyway, the car is setting a code P2074 which is for,

P2074-manifold Pressure/throttle Position Correlation

CORRELATION - HIGH
FLOW/VACUUM LEAK
When Monitored: Engine Running, during all drive modes.
Set Condition: If vacuum drops below 1.5 Hg with engine RPM greater than 2000 RPM
at closed throttle.

POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
VACUUM LEAK
HIGH RESISTANCE IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
MAP SENSOR
HIGH RESISTANCE IN (K1) MAP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K1) MAP SIGNAL CIRCUIT
HIGH RESISTANCE IN (K4) MAP GROUND CIRCUIT
PCM
TP SENSOR OPERATION
HIGH RESISTANCE IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
TP SENSOR
HIGH RESISTANCE IN (K22) TP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K22) TP SENSOR SIGNAL CIRCUIT
HIGH RESISTANCE IN TP (K4) SENSOR GROUND CIRCUIT

I'm assuming the stock PCM is reading the 62mm throttle body as a vacuum leak since I cannot find anything else leaking. The TPS and MAP sensors are well within range according to the Snap on scanner. Would I be correct in assuming that when I finally get the Stage 1 computer this will take care of the problem. The car is a 2005 SRT-4 with a Stage 2 wastegate, M/B exhaust, KN CAI. Should I look at a Stage 2 MAP sensor to possibly fix this problem. Right now I'm driving around with the engine light on because there is no point in resetting it, it comes right back on the next time I run the car. This all started with the new throttle body.

Any help would be greatly appreciated.

 

yup you're right. stage 1 will fix the issue. with the s2 wga and the tb on there the car is unsure as to what's going on. the 2074 is part of the overboost issue when on s0. once you get s1 or higher on the car it shouldn't be a problem any more. you also don't need a 3 bar map sensor (at least for now), so save your money on that one.

 

Thanks PSI Chick !!! That's what I thought, just needed another good I mean in your case great opinion. I hope you don't start charging me for all these answers, I probably couldn't afford it !!!

 

maybe i'll start charging one gallon of race gas for every 10 sentences.....that would pay for my track days haha[sm=gears.gif]

[sm=vader.gif] <----- what's up with that smilie???? lol