So my throttle is acting weird drive it normally it’s fine you floor it and it dies out until you let off and get back in it. Three codes for MAP, IAT, and Coolant Temp Sensor. So far I’ve replaced all three sensors and put a throttle body off a running and driving 5.7 and it’s still acting up. Tried to erase codes and as soon as I do they come back. Any help? Anyone dealt with this? I’ve also swapped computers to see if that would help and it didn’t. Help would be appreciated!

 

Look at the power feed for those sensors. Should be five volts. If it is anything different, that's gonna confuse the PCM.

 

how do you go about checking that?

 

Volt meter. Most sensors get a 5 volt reference signal from the PCM, modify the signal, (change the voltage) and send it back. If the reference signal isn't correct, then nothing else will be either. Since you are getting codes for multiple sensors, so far as I know, the only thing they have in common is the wiring that gives them their reference signal.

 

ok and if it’s off how do you go about correcting that? All the sensors are new.?

 

Depends on how much it is off. If you see 12 volts on that circuit, then there is a short to power somewhere. If it's off by just a couple volts, in either direction, might be a PCM problem.

 

By any chance do you have a power steering pressure switch on the P/S hose? If you do, unplug it and see if you have fluid in the connector. If you do, Remove the PCM connector and check for either water or P/S fluid.