70mm turbo car starts, then won't idle.. Any ideas? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 10 Old 05-13-2009, 08:48 PM Thread Starter
 
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70mm turbo car starts, then won't idle.. Any ideas?

So, car has fuel pressure and oil pressure. It has spark, and fires up great almost immediatly after cranking. It sounds healthy when it starts, a nice "VROOM" to it, then it just kind of dies and vac gauges shoots pretty low (14~vac?). I have a SCT chip that my tuner added the files for the 60# injectors on and he gave me a couple different tunes, one with -10 and +10 for fuel just to get it to his dyno. The car wants to run but for some reason it can't stay up to idle..

Any ideas?

As far as MAF, I have a C&L 76mm in a blow through config, with a good 8" of straight pipe on both sides.

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post #2 of 10 Old 05-13-2009, 08:51 PM
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Sure the idle isnt set to low on the chip?


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post #3 of 10 Old 05-13-2009, 08:59 PM Thread Starter
 
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Sure the idle isnt set to low on the chip?
Positive. We try to give the car gas and it tries to stay alive but can't. I have checked all my vac connections, all are good and zip tied, no leaks.
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post #4 of 10 Old 05-13-2009, 11:59 PM
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Whats the base timing at?

88 gt bigbore 347 ysi 23lbs boost. Best et. 9.09. Best mph 155. 3680lbs with 900rwhp @7000 thru aod tuned by Bob kurgan.
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post #5 of 10 Old 05-14-2009, 12:07 AM Thread Starter
 
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Base timing is at 10, but if we try to advance or play with it it's still the same. I'm taking my chip to him tomorrow. I forgot the old tune had a Pro-M MAF and I'm now using stock, so that may be it. We'll see.
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post #6 of 10 Old 05-14-2009, 06:17 AM
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how are you setting base timing if it isnt idling?
Also that 10* is with spout out correct?

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post #7 of 10 Old 05-14-2009, 11:49 AM
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Do you have a way of monitoring narrow band o2 voltages?

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post #8 of 10 Old 05-18-2009, 04:07 PM
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What is the fuel pressure set to? My C&L does not idle well either but when I am moving it is good.
You may have too much fuel. Check the plugs.
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post #9 of 10 Old 05-19-2009, 04:18 PM
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Sure sounds like vacuum leak. Maybe a crack or a hose with a split?

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post #10 of 10 Old 05-19-2009, 05:04 PM Thread Starter
 
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Got it figured out, had to have the chip re-burnt, it didn't like the 60# files for some reason.

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