Was driving home yesterday and hit a small hill. All of a sudden the car started losing power. Whenever I stepped on the gas pedal, the engine would almost stall. It would go fine as long as I didnt goose it a little bit. It would go easily over 50mph as long as I eased it up there. Got it home and thought it may have been the MAF sensor. Replaced it, same problem. Going to try the coil pack next....what do you guys think?

Did you check Fuel Pressure? Coil pack would be next on my list..

Did you check for codes?


-justin

Coil pack is fine.

Dont have the tools to check for codes. Im gonna replace the fuel filter tomorrow. Fuel pressure if I will check if I can.

Also,

How can I get it to flash the codes? Which of the connector to the ECM do I short? Thanks.

Look in Techinfo, it'll tell you how to retieve codes. My guess is fuel pressure regulator or pump.

Checked the codes.

According to the codes, it has nothing to do with fuel, I think.

It threw codes:

code 21: Throttle position(TPS)voltage high

code 23: Intake air temperature(IAT)sensor low temp indicated

code 34: MAF sensor-voltage too low

What does this tell you?

Is the IAT plugged into the air intake?

Did you reset the computer when you replaced the MAF?

Does the car seem to shift fine?

Yes, car shifts fine. It just stutters when I press on the gas pedal. The IAT is right beside the air intake. Dunno if this helps.

Did you unhook the battery for a while when the new MAF sensor was put in? IAT next to the intake? Do you not have the stock air box with a hole for it to mount in? If you have an aftermarket intake, you absolutly must have a hole for the sensor to mount in.

You need to have the TPS voltage tested at idle and WOT.

Airbox is stock. Everything in the car is stock. I am the second owner of it, in 14/15 years. Im gonna unplug the battery again tomorrow, and try a new fuel filter. It could be plugged up. If not, then I will move onto your suggestions, thanks.