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post #1 of 29 Old June 8th, 2009, 05:37 PM Thread Starter
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cutting out when i hammer on it

i got a 92 gt and im having trouble with it cutting out. when i just take off slow it runs just fine...but when i put it to the floor it cuts out real bad and just runs like shit....help me out fellas
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post #2 of 29 Old June 8th, 2009, 05:43 PM
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post #3 of 29 Old June 8th, 2009, 05:49 PM
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Originally Posted by Foxracer1606 View Post
i got a 92 gt and im having trouble with it cutting out. when i just take off slow it runs just fine...but when i put it to the floor it cuts out real bad and just runs like shit....help me out fellas
how good of shape is the car in? has it been yours? ive seen a few people has neoprene hose in the fuel line before and it gets weaked by the gas and when in full throttle it pinches itself off and closes the line. its a long shot but i wanna give you the non obvious things to look at. hope it helps someone sometime!

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post #4 of 29 Old June 8th, 2009, 05:50 PM
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Check the fuel system: pressure, filter, injectors

89 LX Coupe: Factory 5.0, common performance and suspension bolt-ons (306 build inprogress)
86 GT: (current 1/4 project) will have primarily Team Z suspension and chassis additions, 408 with nitrous in the works
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post #5 of 29 Old June 8th, 2009, 05:51 PM Thread Starter
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would it be the tbs if its a brand new throttle body, along with new fuel pump, fuel filter, injectors, upper and lower, mass air
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post #6 of 29 Old June 8th, 2009, 05:54 PM Thread Starter
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and the car is in great shape...140,000 miles but in really good shape
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post #7 of 29 Old June 8th, 2009, 06:00 PM
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i see. :|

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post #8 of 29 Old June 8th, 2009, 06:28 PM
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would it be the tbs if its a brand new throttle body, along with new fuel pump, fuel filter, injectors, upper and lower, mass air
not tbs, tps (throttle position sensor). you can check it with a vom. A friends car had the exact same symptoms.
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post #9 of 29 Old June 8th, 2009, 06:40 PM
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Scan for codes first. Check fuel pressure as well. Those are the first two things you need to do.

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


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post #10 of 29 Old June 8th, 2009, 08:30 PM
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My 88 is doing the exact same thing. Ran it for codes and it came back TPS. Going to get a new one this week.

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post #11 of 29 Old June 8th, 2009, 11:54 PM Thread Starter
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yea thats what i meant tps..my bad...and how do i check it with a vom
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post #12 of 29 Old June 9th, 2009, 12:19 AM
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check your timing as well


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post #13 of 29 Old June 9th, 2009, 08:43 AM
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My 88 is doing the exact same thing. Ran it for codes and it came back TPS. Going to get a new one this week.
Don't just get a new one. Check the voltage of the one you have, it may just need to be adjusted.

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post #14 of 29 Old June 9th, 2009, 12:59 PM
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Mustang idle surge and base idle reset

read this about checking the tps voltage
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post #15 of 29 Old June 9th, 2009, 01:12 PM
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Quote:
Originally Posted by Iwannagofast View Post
Mustang idle surge and base idle reset

read this about checking the tps voltage
That is only checking in the closed position. He will need to check it thru out the travel of the throttle body to see if there are any spikes or drops in voltage. The voltage should rise smoothly as the throttle is opened.

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


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post #16 of 29 Old June 9th, 2009, 09:47 PM
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i just had the same problem.
i have a 90 gt and when i got on it around 4000 rpms it would cut out

and its not ur fuel!! i replaced my injectors ,regulator , filter , and pump!! and still did it!
it ur TFI ingition control module. its that lil box thats mounted on the side of ur distrbutor! replace that and ull be good
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post #17 of 29 Old June 9th, 2009, 09:52 PM
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MY suggestions is to go through, and check all of your grounds, make sure they are all getting a good connection.

those are the symptoms i had when a few grounds were in need of repair.

also watch your spark plug wires at night someplace its pitch black.

you should give your eyes a few minutes to adjust to the dark, i could see FAINT arcs when nobody else that was around could see them. it didn't help that they were intermentan either hah.
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post #18 of 29 Old June 9th, 2009, 09:57 PM
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Quote:
Originally Posted by LETHALFORDS View Post
i just had the same problem.
i have a 90 gt and when i got on it around 4000 rpms it would cut out

and its not ur fuel!! i replaced my injectors ,regulator , filter , and pump!! and still did it!
it ur TFI ingition control module. its that lil box thats mounted on the side of ur distrbutor! replace that and ull be good
That is a prime example why to diagnose to repair instead of repair to diagnose. When you start throwing parts at something all you do is throw money out the window.

With that being said, there is no way you can diagnose his problem over the internet and know for sure that the TFI module is his problem. You might be able to offer it as a possible cause but that is it. Things need to be tested.

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


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post #19 of 29 Old June 9th, 2009, 10:20 PM Thread Starter
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aight well ill try those things...also i just figured out it only does it once the car is nice and warmed up and about 30-45 minutes into driving it...then it will start to cut out when i get on it..sometimes it comes out of it and runs good but most of the time it continues to do it...so i dont know if that changes things or not...
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post #20 of 29 Old June 9th, 2009, 11:52 PM
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thats same thing that was happening to my car!!! when it was a lil cold it ran good!! but after 25-35 min it would cut out! i promise you thats what it is!!! this just happen to me last week!!! and it was all the same thing thats ur saying!!! i have a fourm on stang.net saying what happened!!!

and alot of guys said the same things all these others guys are saying and that wasent the problem!! the module is 39.99 at autozone just try it! put it on and take it down the street it will run like a champ!!!

ur car is fine u just need that man!!
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