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#2
08-29-2012, 03:31 PM
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Re: 99' GC cutting out while braking
That's a good one. I'd guess it's vacuum related since both use it to function. Brakes use a vacuum operated brake booster. Check EGR vacuum line connections.
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**We took the time to answer your post. Please give us some time and post the fix. It will help hundreds. **Follow prescribed safety practices before attempting any procedures. Doubts? Consult a maintenance manual. 07 Fusion / 06 RAV4 / 06 Accord / 96 Gr Caravan 
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#4
08-31-2012, 12:53 AM
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Re: 99' GC cutting out while braking
http://www.obd-codes.com/p0172 Again points to a possible vacuum leak.
__________________
**We took the time to answer your post. Please give us some time and post the fix. It will help hundreds. **Follow prescribed safety practices before attempting any procedures. Doubts? Consult a maintenance manual. 07 Fusion / 06 RAV4 / 06 Accord / 96 Gr Caravan
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| The Following User Says Thank You to RIP For This Useful Post: | ||
rgtiger70 (09-11-2012)
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#5
09-11-2012, 01:11 PM
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Re: 99' GC cutting out while braking
Had checked out and said the vacuum system was fine, no leaks they found. Said they(mechanic) neeeded to checck out the main board to see what was going on with computer.
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#6
09-11-2012, 01:52 PM
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Re: 99' GC cutting out while braking
With vacuum good next on the list is the Idle Air Control (IAC) valve. It trys to maintain a constant 800 rpm idle by opening a port in the throttle body downstream of the throttle plate. Anytime the throttle plate is closed meaning your foot is off the gas pedal, this port opens to control idle rpm. It opens further as you slow to a stop, turn on the A/C, turn the steering wheel, shift into gear - anytime there is a load on the engine when the throttle plate is closed. Many times that port gets clogged causing stalling and or rough idle. You may get away with just cleaning the throttle body and that port.
If it stalls with throttle applied then the IAC is out of the picture.
__________________
**We took the time to answer your post. Please give us some time and post the fix. It will help hundreds. **Follow prescribed safety practices before attempting any procedures. Doubts? Consult a maintenance manual. 07 Fusion / 06 RAV4 / 06 Accord / 96 Gr Caravan
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#7
09-11-2012, 04:57 PM
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Re: 99' GC cutting out while braking
May want to try cleaning the throttle body, simple and cheap.
Good luck edit.... oopps, sorry Rip, I just read the last sentence of your post, I agree, that should do it. Bob
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#8
09-21-2012, 12:11 AM
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Re: 99' GC cutting out while braking
Had taken to dealership to get work done($500 later). Was told the idle control motor was burned out due to carbon build up. Had replaced and the engine cleaned(de-carbonized). A day later still having same issue, cutting out when idle gets low, running a little rough when driving- like skipping firing sequence. But no one mentioned anything wrong with the firing order. Still cant ffigure out, need help!
Thanks for any feed back. Robert
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