Hi all,

I have to press the throttle a little when starting the car. If I don't the car will start and stall right away.

if I press the throttle in a little the car will start but stall as soon as I take my foot off the throttle.

If I do it slowly i can get the motor (unmodded 420A) idle like normal.

When driving as soon as I press in the clutch, the motor's rpm drops tp zero and shuts down.

I have to press both the throttle and brake to keep the car running.

I know the ECU keeps the idle up until the car reaches mph and I do have a bad speed control switch, acid leaked from the battery and messed the switch up pretty bad. I know that needs replacing.

But I do have speedometer readings

Wven with the bad switch, why would the car fail to start and run without having to press in the throttle in to keep the RPM up?

the Fault/CEL codes 12 42 25 55

Any ideas?

Thanks in advance!

"There are only stars in the sky because the Moon has blocked the Sun from view" -Soular

Have you attempted to look up the code definitions and troubleshoot it yourself? We like to help those that attempt to help themselves.

http://www.2gnt.com/index.php?d=PCM_Error_Codes

Additionally, what year is your 2GNT (96?)? If OBDII, pull the actual codes as they are far more descriptive than simple CELs.

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2012 2500HD LML

Most of what youre saying points towards the Idle Air Control motor. Might need replaced.

95 Eclipse GS: 10.5:1, Crower 2's and MSII
186 WHP - 150 WTQ
14.697 @ 93.85 MPH......Gone, but not forgotten
99 420A Avenger: Given to my sister
99 GS OZ: Sold
03 Evo 8: Family Car with balls

Thanks for the help. I will look into that. Thanks for the rapid replies guys.

"There are only stars in the sky because the Moon has blocked the Sun from view" -Soular

Yes Looking up the codes was the first thing I did.

Thanks

"There are only stars in the sky because the Moon has blocked the Sun from view" -Soular

IAC most likely. Take the whole throttle body off and clean it while your at it.

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99 Eclipse gs (Daily)
89 Honda Crx (Drag car project)