my car has a DEMON in it!! please help - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 12 Old 06-30-2007, 01:59 AM Thread Starter
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my car has a DEMON in it!! please help

i have a 92 coupe with a 306 afr185's,holley systemax intake,big fuel system,42lb inj,big air 90mm maf,PTK t-64 converted to blow thur,and a built AOD. my problem is it doesn't want to start, cold it starts fine but let it run 20-30 seconds..... and it's a bitch to start.... whats the deal????? my tuner is really good at tuning cars and he's not sure either the whole setup only has about 800miles on it, do i need to just drive it a while, and spark plugs are another issue it has 3924 autolite in it now but i think my afr papers say run a 3922 for a boosted app.... any ideas would be greatly appriciated, thanks

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post #2 of 12 Old 06-30-2007, 03:15 AM
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Did you remove any sensors? perhaps the coolant temp sensor? the computer uses that for starting.

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post #3 of 12 Old 06-30-2007, 06:34 AM Thread Starter
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no, its still on there. cranks fine, plenty of fuel, and spark
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post #4 of 12 Old 06-30-2007, 08:48 AM
 
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Do you have your timing locked out??? If you do, then the motor will be alot harder to start with all that ignition timing.....
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post #5 of 12 Old 06-30-2007, 01:04 PM
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Sounds like the TFI module on the distributor. Take that off and get it tested.
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post #6 of 12 Old 06-30-2007, 05:00 PM Thread Starter
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my tfi module is brand new from ford! i thought that too. my timing it set to 10 initial but limited to 20 total
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post #7 of 12 Old 06-30-2007, 08:57 PM
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is the pill out? that makes it harder to start like stated. And slo the IAC being unplugged and/or possibly bad might cause it to..
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post #8 of 12 Old 06-30-2007, 10:21 PM Thread Starter
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the pill is still in it, and the iac is brand new also
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post #9 of 12 Old 07-01-2007, 08:24 AM
 
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When you say "hard to start", do you mean it cranks fast but just wont start or the motor "drags" and slowly cranks.....Also, do you have an MSD box?? It might be something to do with that.....I had a buddy that had this same exact problem as you...Car started fine cold, but when it ran for a little while, the damn thing wouldnt start back for nothing.....Ended up being something to do with the box or how it was wired.......Oh BTW, you do need to change those spark plugs.....You need the colder ones that AFR recomended(3922's)

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post #10 of 12 Old 07-01-2007, 10:18 PM Thread Starter
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it cranks fast and just wont start, it does seem like just when you let off the key it kinda wants to start sometimes. thanks a lot i think im going to buy a digital 6

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post #11 of 12 Old 07-01-2007, 10:46 PM
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Have you tried starting it with the throttle all the way to the floor. If it starts quicker then it is getting to much fuel on startup. Just something to try maybe.
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post #12 of 12 Old 07-01-2007, 11:03 PM
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this is an easy fix...... check the injector harness ground that is bolted to the firewall i believe it's a orange wire, if thats off it will fix everything once attached, if it is off it will start fine, then once you try to restart it ,it wont start for ####, then if you floor it , it will start and pour blck smoke out the rear keep me posted on your out come., or one other thing is the Ghost coolant temp sensor on the intake, that a trouble maker

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