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post #1 of 5 (permalink) Old 03-23-2010, 08:59 PM Thread Starter
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Thumbs down Having Some Issues

Ok guys and gals, I seem to be on a never ending battle of love and hate with my car. I am having some issues with it lately. So let me start with some explaining and if anyone has any suggestions please let me know.
Ok, so the car seems like it is running out of fuel. When you run full boost it bucks like crazy and then backfires. There is a switch in the car that goes from "Reg" to "Premium" the owners manual explains that when you switch it over to premium it advances the timing 10 degrees and dumps more fuel. Now after this explanation, the car seems to run decent when you press the switch unless the temp gets over 170. Anytime it gets over 170 it starts to act like its not getting any fuel. I do have a 190 fuel pump in it that got put in around 1-1/2 yrs ago. I do have a slipping clutch also which might be adding to the problems.
I have an Adjustable Fuel pressure regulator that i am wanting to put on the car. Should I install it and bump up the fuel pressure some? Thinking maybe a new fuel filter might help some also?? I also have a new clutch kit that needs to be installed sometime. Was thinking about giving it a full tune up also sometime in the very near future.
Not really sure where else to go from there. Any other suggestions would be great.
Thanks in advance good people
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post #2 of 5 (permalink) Old 03-23-2010, 09:44 PM
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I'd put the new fuel pressure regulator on as well as a new fuel filter. Also double check fuel pressure while you're there just to be sure that fuel delivery isn't the issue.

If that doesn't solve the problem, the next thing I'd look at would probably be the engine coolant temperature sensor; if it's not reading correctly the computer's a/f calculations will be off.

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post #3 of 5 (permalink) Old 03-24-2010, 08:35 AM
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I would also ensure your ignition is in top notch condition (plugs, wires, etc). If it is a little weak, it won't have enough power to jump the spark plug gap when you're at the higher boost pressures.

It doesn't fire the plug a few revolutions so it is pumping raw gas into the exhaust. Then something ignites the gas in the exhaust and you get a backfire.

But as Brandon said, a new regulator and filter wouldn't hurt.

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post #4 of 5 (permalink) Old 03-24-2010, 09:22 AM
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heat related missfires on a 2.3 turbo are 9 times out of 10 the TFI module that is on the distributor, it;'s held on by 2 screws and goes bad due to heat..ALLOT.

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post #5 of 5 (permalink) Old 03-24-2010, 11:52 AM
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If the TFI was bad, the car would not run at all, but if it is not a MOTOCRAFT one, get one.. the 5 pin from a V8 or V6 car will work also , the cheapo parts sore ones do not have stedy maps in them and can cause timing flucuations of up to 15* I have found out

drop in a set of Autolight RACING spark plugs gapped to .036 part number AR764

Install your AFPR and set base fuel pressure to 40psi with car running and vac hose disconected
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