Jared_blown5.0

Ok so here is what is goin on. I have a 94 mustang gt. I just did a h/c/i swap and cant seem to get her runing right. First off it doesnt idle right, i cleaned the iac and the tb, and the maf sensor. It will surge like crazy and a lot of times it will just die out, and for reference it is an automatic. I pulled the plugs and they arent blackthey are a nice brown.
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-Also i am not burning coolant but the overflow jug keps filling up, and coming out the overflow and then i need to put more in. I did put a 160 degree thermostat in it. Do you think that has anything to do with it? I pressurized the system and it held at 16 psi and no leaks.


Please help me guys. I just kinda wanna kick it right about now lol

88BlueGT

Well, Im no SN-95 expert but their computers are very touchy and throwing all these mods on it at once can really make it crap out. Did you run a scan on it or anything?

Jared_blown5.0

hey, no i didnt run ascan, and still have the stock chip in it.

92hatchLX

Maybe try and reset the computer, disconnect the negative battery cable for about 15-20 minutes reconnect and let it idle for a little bit and do some light driving, the computer probably just needs to learn your modifications. What's your fuel pressure at?

Jared_blown5.0

I did reset my computer I do it everytime i put my car in the garage i pull the negative cable off> my fuel pressure is at forty three psi with vacumn off> please help me guys>

Jared_blown5.0

come on guys.. . no one knows ?

Joel5.0

Suggested to-do list:

- Resetting the base idle
- Setting the TPS voltage (Setting it between .8vdc - 1.0vdc is OK)
- Timing calibration
- Finding possible vacuum leaks.
- How to run a KOEO, KOER Self-Test codes scan and Cylinder Balance Test

Jared_blown5.0

thanks joel did all that nothing fixed it...any other ideas?

kevinas1214

Joel i did a 65 mm tb and put edlebrock upper lower and replaced all lines.... then i put on an aftermarket mass air flow sensor... it ran like **** and died out at over 3500rpm and would die at idle. Try replacing it with the factory mass air flow sensor

Joel5.0

Run a KOEO, KOER Self-Test codes scan and Cylinder Balance Test, to gather data and info, and go over this DO's and DONT's list....JIC