1999 GT dying when slowing down - Ford Mustang Forum
 
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post #1 of 7 (permalink) Old 02-20-2010 Thread Starter
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1999 GT dying when slowing down

This has happened twice. Driving normal and right when I slow down to stop lets say at 30 mph the engine just dies but everything electrical keeps working 100% fine. I replaced the IAC about 3 months ago. Not sure what's up...?


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post #2 of 7 (permalink) Old 02-20-2010
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sounds like a vac leak. but i think everything revolves around a vac leak. but im probably right. but im wrong a lot. you check for all that ?

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post #3 of 7 (permalink) Old 02-21-2010 Thread Starter
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Quote:
Originally Posted by ****.breakey View Post
sounds like a vac leak. but i think everything revolves around a vac leak. but im probably right. but im wrong a lot. you check for all that ?
vacuum lines are a'ok

? ?

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99 Mustang GT - mint condition
-
04 Terminator - Pullied, diablo predator tuner with dyno tune, airbags, MM subs/cc plates, Wilwood brakes, 4 point roll bar, FR500 steering wheel, staggered bullitts, JLT cai, Magnaflow exhaust, mgw shifter

00 V6 - Kenny Brown V6 stuff, Dr Gas x pipe
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post #4 of 7 (permalink) Old 02-21-2010
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It could still be the IAC (few people replace it with the OE Ford part, which I recommend)...

Did the problem precede the IAC? Did the IAC replacement "temporarily" fix the problem? If so, I would look at it again.

Otherwise, check the fuel filter and your battery grounds.

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post #5 of 7 (permalink) Old 02-22-2010 Thread Starter
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Quote:
Originally Posted by tripleblack View Post
It could still be the IAC (few people replace it with the OE Ford part, which I recommend)...

Did the problem precede the IAC? Did the IAC replacement "temporarily" fix the problem? If so, I would look at it again.

Otherwise, check the fuel filter and your battery grounds.
Yeah I replaced it with a non oem. What's the best way to clean the oem one - I still have it. Would spraying elecrical contact cleaner work?

10+ Year Mustang owner.
99 Mustang GT - mint condition
-
04 Terminator - Pullied, diablo predator tuner with dyno tune, airbags, MM subs/cc plates, Wilwood brakes, 4 point roll bar, FR500 steering wheel, staggered bullitts, JLT cai, Magnaflow exhaust, mgw shifter

00 V6 - Kenny Brown V6 stuff, Dr Gas x pipe
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post #6 of 7 (permalink) Old 02-22-2010
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Quote:
Originally Posted by Black_35th View Post
Yeah I replaced it with a non oem. What's the best way to clean the oem one - I still have it. Would spraying elecrical contact cleaner work?
You don't want to immerse the whole IAC in anything, that can wreck the electronics. Contact cleaner can work, if its not too far gone, though my experience has been that its a temporary fix.

Using it for troubleshooting makes sense, though.

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post #7 of 7 (permalink) Old 02-22-2010 Thread Starter
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Quote:
Originally Posted by tripleblack View Post
It could still be the IAC (few people replace it with the OE Ford part, which I recommend)...

Did the problem precede the IAC? Did the IAC replacement "temporarily" fix the problem? If so, I would look at it again.

Otherwise, check the fuel filter and your battery grounds.
Quote:
Originally Posted by tripleblack View Post
You don't want to immerse the whole IAC in anything, that can wreck the electronics. Contact cleaner can work, if its not too far gone, though my experience has been that its a temporary fix.

Using it for troubleshooting makes sense, though.
Cool thx for the help!

10+ Year Mustang owner.
99 Mustang GT - mint condition
-
04 Terminator - Pullied, diablo predator tuner with dyno tune, airbags, MM subs/cc plates, Wilwood brakes, 4 point roll bar, FR500 steering wheel, staggered bullitts, JLT cai, Magnaflow exhaust, mgw shifter

00 V6 - Kenny Brown V6 stuff, Dr Gas x pipe
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