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http://bostonstangs.com/ -> BOSTONSTANGS.COM -> Tech Forums -> been having some problems with the 89
Post Info TOPIC: been having some problems with the 89
Mustang5L5


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RE: been having some problems with the 89
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Yes, that's the pick-up. It and the TFI are commonly known to fail They can both be tested though.

http://351winsor.com/joel/Ignition_Systems/tfi2.html


But for $10 more you can get a Ford replacement part off rockauto.com vs an aftermarket. P/N DU30C




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Mike
loopy


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Mustang5L5 wrote:

Yes, that's the pick-up. It and the TFI are commonly known to fail They can both be tested though.

http://351winsor.com/joel/Ignition_Systems/tfi2.html


But for $10 more you can get a Ford replacement part off rockauto.com vs an aftermarket. P/N DU30C





thanks i just went outside to start it it took a few tries it was running for a few mins and just died

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loopy


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well i just put a reman distributor in it now im going to set timing and see what happens

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loopy


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problem is better not solved this is driving me fucken nuts! it seems to start fine but now i believe i still nedd a fuel pump, i was driving to the market on the highway and i lost power car died. could not hear the fuel pump turn on. can i wire my new fuel pump to a switch that i manually turn on, so this way i know my fuel pumps on. if so how should i wire it thanks? this sucks all these nice days and im still driving around my beater civic arrggfurious.gif i almost ready to trade this thing for another streetbike

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loopy


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well i went outside this morning and the fuel pump now is not coming on, so i took my seat out and tested the fuel pump relay heres what i got

orange/blue wire-12.07
pink/black wire-7.84
red/black wire-6.23
brown/green wire-6.23.

i took out the kick panel to look at wires near computer and i found something weird someone jumped two wires from a piece of the harness and ran them through the passengers door grommet from what i could trace havent taken the panel off yet her are some pics of the wire whats is this wire for.
I really need help with this im still not sure if its the fuel pump or something else it died on my me a few times yesterday and no pump would come on. i am so stumped.
all these test were with the key in the on position

-- Edited by loopy on Sunday 11th of April 2010 12:00:01 PM

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Mustang5L5


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I'll see if i have info in this later. At work, so can't really look stuff up

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Mike
loopy


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Mustang5L5 wrote:

I'll see if i have info in this later. At work, so can't really look stuff up




did you ever find anything out? when i put the key in and turn it to the run position fuel pump doest turn on and the relay doesnt click, i changed the relay and still nothing. when i turn the key on the eec power relay clicks but not the fuel pump relay.

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gixxer1


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loopy wrote:

Mustang5L5 wrote:

I'll see if i have info in this later. At work, so can't really look stuff up




did you ever find anything out? when i put the key in and turn it to the run position fuel pump doest turn on and the relay doesnt click, i changed the relay and still nothing. when i turn the key on the eec power relay clicks but not the fuel pump relay.



check your pwr and ground at the relay.....this is one reason why i aked before if the car was a original 5.0 car.

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93 svt Cobra #4892....... 92 ssp KS #64....... 89 ssp Az #414.......all rust free!
Mustang5L5


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Sorry man, had a crazy week

This info should help you troubleshoot the FP relay

Mustang Fuel Pump troubleshooting

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Mike
loopy


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is there a way to bypass this shit and run it off a toggle switch

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loopy


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well i put the old fuel pump relay back in and put the new relay in place of the eec relay and then the fuel pump came on and the car started so i guess the ecc relay was bad i am so happy. i will take her for a drive tomorrow i have my interior and shit to put back together.

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Mustang5L5


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So...still running okay?

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Mike
loopy


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Mustang5L5 wrote:

So...still running okay?




yes its been running great. starts up everytime and no hesitation, now when i hit the gas she goessmile.gif well to sum it up a reman distributor and ecc relay fixed my starting and hesitation problem so guess i dont need a fuel pump. thanks for all the help

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loopy


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well i guess something else is happening its been running great but today i was drivng around nothing wrong went home, a few mins later i left backing out of the yard it stalled and would not start up so i pushed it back into the yard. came home a few hours later and it stated so i moved it out of the way. i just dont understand this car anymore

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Mcnally351


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Is this car a 4banger conversion? Are you sure you have the matching year wiring harness? I had a problem with my car when I switched to efi. I had a different engine harness than the body harness. My fuel pump would just mysteriously shut off and not start up. Then I would come back later and it would start. I bought a ford engine harness and connected it to a 93 body and never had the problem again. I believe there was an additional relay for the pump on that harness. Good luck

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loopy


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Mcnally351 wrote:

Is this car a 4banger conversion? Are you sure you have the matching year wiring harness? I had a problem with my car when I switched to efi. I had a different engine harness than the body harness. My fuel pump would just mysteriously shut off and not start up. Then I would come back later and it would start. I bought a ford engine harness and connected it to a 93 body and never had the problem again. I believe there was an additional relay for the pump on that harness. Good luck




yes it is im pretty sure its the right harness. the fuel pump was turning on and it still wouldnt start

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stang91


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sounds like bad spark

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91 mustang 5.0 97 expedition 5.4
loopy


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it kinda sounds like something electrical, like i said i was driving it around the past week and no bullshit then it dies as im backing out of the yard, and starts up a few hours later not sure what could be causing it. im sure its something stupid.

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loopy


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would a starter solenoid cause this

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loopy


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i have an a9l computer in the car its from a 93 would that cause any weird shit


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Mustang5L5


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loopy wrote:

would a starter solenoid cause this






Nope.



A9L never came in a 1993, but doubt that would be your issue.


Did you ever change the dizzy out?

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Mike
loopy


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Mustang5L5 wrote:

loopy wrote:

would a starter solenoid cause this






Nope.



A9L never came in a 1993, but doubt that would be your issue.


Did you ever change the dizzy out?


i put a brand new reman dizzy in, im almost thinking maybe a loose wire somewere but not sure on were to look it runs gret no hesiation its got nothing but power so i know the dis fixed that problem it just dont make since, i was backing out of my yard had the wheel turned to the right and it just died, i said fuk took my civic and left came back a few hours later started right up and was running great, maybe i;ll look at it today just dont know where to look anymore.

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Mustang5L5


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A lot of times, stall and no start is related to either the pip or the tfi.

Let me dig around for a bit and see if I cam find anytthing else to look into

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Mike
loopy


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is it possible the reman dis i bought is bad or somehing went wrong with itcause if thats the case i should of spent the extra 100 bucks and got a msd or accel dis.

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DMURB


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as i read this thread its almost like you stole my car. (89 4 cylinder conversioin) my car is having the exact same problems. ive gone and acctually just started replacing everything and anything that people said well it could be this or it could be that. i replaced the tps sensor, plugs, wires, new cap and rotor, ive adjusted my timing, i changed the tfi on the distributor. changed my accel coil just to get worse result to switch back to my accel. i also cannot figure out what the hell is going on with my car. when its hot wont start. ive actually wiated for half an hour at the gas pump for my car to cool off enough to start.

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loopy


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DMURB wrote:

as i read this thread its almost like you stole my car. (89 4 cylinder conversioin) my car is having the exact same problems. ive gone and acctually just started replacing everything and anything that people said well it could be this or it could be that. i replaced the tps sensor, plugs, wires, new cap and rotor, ive adjusted my timing, i changed the tfi on the distributor. changed my accel coil just to get worse result to switch back to my accel. i also cannot figure out what the hell is going on with my car. when its hot wont start. ive actually wiated for half an hour at the gas pump for my car to cool off enough to start.




its a possibility its the pip sensor in the distributor. thats what fixed my problem. Then i could shut it down and start it up anytime i wanted. If you have any other questions just ask.

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qwik88


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possibly an ignition switch

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DMURB


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I've had my car a little over a year. Never had any problems. Now after it sat over the winter it runs like shit. Only when it is warm it won't start. I can go out start it up it will idle fine shut it off and then start right back up. But when the car is between 180-190 won't start. My fp I think maybe a little low from what I've read in the thread. My car is always at 32# my injectors are 30#. When the car is still cool it idles great. But if I drive it just sputters hesitates bogs almost like its misfiring. But when the car is warm it runs and drives great. Shut it off no start.till it cools off. Like you said loopy its driving me fing crazy

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loopy


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DMURB wrote:

I've had my car a little over a year. Never had any problems. Now after it sat over the winter it runs like shit. Only when it is warm it won't start. I can go out start it up it will idle fine shut it off and then start right back up. But when the car is between 180-190 won't start. My fp I think maybe a little low from what I've read in the thread. My car is always at 32# my injectors are 30#. When the car is still cool it idles great. But if I drive it just sputters hesitates bogs almost like its misfiring. But when the car is warm it runs and drives great. Shut it off no start.till it cools off. Like you said loopy its driving me fing crazy




i bought a reman distributor and that seemed to fix my no start and hesitation problem there like 100 bucks with the module at auto zone and advanced. then my computer relay was shitting the bed and then one day just died. i replaced the distributor because i did not feel like taking it apart it was only 50 bucks more i would try that


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DMURB


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great thread. lots of help. thanks a bunch too everyone with ideas. im going to get started. im going to change the fuel filter, run some good injector cleaner and a new distributor. ill see what that does for me. thanks for the help everyone

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loopy


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no problem let us know how you make out

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