Oh crap....did I kill my car?

[89turbosupra]

I tried to make my car run better by cleanning the MAF sensor and the TB with some stuff i got at work. I got the MAF nice and clean then sprayed it down the TB. I went to start the car and of course it idle like crap for a couple minutes then idled fine. I reved it a little bit and it stummbled and died. I took it around the block and it ran like crap. It would buck and backfire like crazy at low rpms and only died once at a stop. I took it again and it got worse. Now everytime you tap the gas it stumbles and dies immediatly. but it will fire right up again. It runs smooth if I hold it at 3k but dies once you let off. I need help bad. Do you think I fried the Maf sensor or it could be the TPS.I need help and I have no codes. THe stuff I used is MOC throttle body and air intake cleaner. Any help is appreciated.

 

[jmanbball]

You killed it. I did the same thing. You will have to replace the Air Flow Meter(what you refer to as a maf) with a new or used piece.

 

[jdub]

Check and make sure your connection to the AFM is good. Un-plug it, then put it back in snug. Make sure your intercooler piping is clamped tight. Blow out your AFM around the sensor wire with compressed air...be careful not to damage the sensor.

Having said that...I've seen several people clean the sensor with carb cleaner...killed every one of the AFMs it was done to.

 

[89turbosupra]

Well if it is dead is there a way to know for sure? I cant find a way in my haynes manual. I guess its time for the lex mod and just use my housing till I get the injectors and safcII.

 

[jdub]

The TRSM has tests in the trouble shooting part of the FI section for the AFM.
http://www.cygnusx1.net/supra/techtips.html


The problem is you may pass the tests...the carb cleaner damages the photo transistor. If you get a Lex AFM, it will need to include the electronics...I kinda doubt you will be able to use the one you have.

You could alway get a MAFT Pro and eliminate the AFM alltogether

 

[SacoMan]

Many people have made this error, you need a new AFM or go maf pro or whatever

 

[starscream5000]

The TRSM has tests in the trouble shooting part of the FI section for the AFM.
http://www.cygnusx1.net/supra/techtips.html


The problem is you may pass the tests...the carb cleaner damages the photo transistor. If you get a Lex AFM, it will need to include the electronics...I kinda doubt you will be able to use the one you have.

You could alway get a MAFT Pro and eliminate the AFM alltogether

Ditto on the MAFT Pro, I will be buying one once i've started the rebuild

 

[confusatron]

Check and make sure your connection to the AFM is good. Un-plug it, then put it back in snug. Make sure your intercooler piping is clamped tight. Blow out your AFM around the sensor wire with compressed air...be careful not to damage the sensor.

Having said that...I've seen several people clean the sensor with carb cleaner...killed every one of the AFMs it was done to.

I thought that I had killed mine too because I did the same thing with some heavy duty throttle body cleaner. Turns out though, after resetting the ECU by unplugging the battery for a few minutes, then restarting the car and playing with the gas pedal a few times, driving it around the block a few times, car was back to normal. Runs fine now. Try it out before you pronounce her dead.

 

[jdub]

I thought that I had killed mine too because I did the same thing with some heavy duty throttle body cleaner. Turns out though, after resetting the ECU by unplugging the battery for a few minutes, then restarting the car and playing with the gas pedal a few times, driving it around the block a few times, car was back to normal. Runs fine now. Try it out before you pronounce her dead.

You sir are a lucky man

That's what I was trying to get him to do as well. Re-setting the ECU may well help, but if the photo transistor is toast...party over.

 

[xXxICExXx]

I had the same problem 2 weeks ago.....I just let my AFM sit for 2 days and dry completely and it worked fine afterwards, after a bit of idling and driving around the block.