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1989 GT cranks but won't start

  • Thread starter Thread starter Vince305
  • Start date Start date Jun 14, 2022
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    1989 foxbody 1989 gt help needed won't start
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manicmechanic007

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#21
  • Jun 27, 2022
  • #21
It might be flooded real bad from no spark previously?
Floor the foot feed and try it again
 

Vince305

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#22
  • Jun 27, 2022
  • #22
General karthief said:
You could do it yourself
Click to expand...
Oh I would, if I could. I have 0% of tools and live in an apartment complex.
 

Vince305

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Jun 27, 2022
#23
  • Jun 27, 2022
  • #23
manicmechanic007 said:
It might be flooded real bad from no spark previously?
Floor the foot feed and try it again
Click to expand...

Will do!
 

Vince305

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Jul 10, 2022
#24
  • Jul 10, 2022
  • #24
manicmechanic007 said:
Fuel pump or TFI module
Check fuel pressure
Check blinking light on negative side of the coil while it cranks over
Noid light on injector (look it up if needed) just a light to blink showing the processor is trying to fire the injector
Click to expand...
General karthief said:
Did your mechanic do the checklist?
Click to expand...
So, I finally was able to have someone else come out and check it out. It was able to run on starting fluid, and since the fuel filter had already been replaced it's the fuel pump. The car had sat for atleast 25+ years, so whatever junk in the tank has clogged the fuel pump.

With that being said the only way to replace the fuel pump is to drop the fuel tank correct?
 

Potomus Pete

I'm still waiting for the fully nude shots
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#25
  • Jul 10, 2022
  • #25
Another twenty five year old gas situation. Read up on it here so you get the gas out. Then you should get it right
 

Rdub6

So while I wait to figure out my rear end issues
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#26
  • Jul 10, 2022
  • #26
Vince305 said:
So, I finally was able to have someone else come out and check it out. It was able to run on starting fluid, and since the fuel filter had already been replaced it's the fuel pump. The car had sat for atleast 25+ years, so whatever junk in the tank has clogged the fuel pump.

With that being said the only way to replace the fuel pump is to drop the fuel tank correct?
Click to expand...
Didn’t you say you had fuel spraying at the rail?
 

Vince305

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#27
  • Jul 10, 2022
  • #27
Rdub6 said:
Didn’t you say you had fuel spraying at the rail?
Click to expand...

Yes, but because the fuel pump is clogged I think it was only getting a little bit and then sometimes not even any at all. Like when we were cranking it would fire once or twice but stumble because it wasn't getting a flow of fuel. When we had been spraying starting fluid it would run continuously, no stumble.
Potomus Pete said:
Another twenty five year old gas situation. Read up on it here so you get the gas out. Then you should get it right
Click to expand...
That's not the entire case, It has been my daily driver for the last 2 years but due to it sitting for 25+ years the sediment/gunk finally clogged the fuel pump (Which I kind of expected, and figured it might be the cause to why it's not starting). Also I'm either gonna have the fuel tank cleaned out or replaced while the fuel pump is being replaced.
 

rednotch

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#28
  • Jul 10, 2022
  • #28
Vince305 said:
So, I finally was able to have someone else come out and check it out. It was able to run on starting fluid, and since the fuel filter had already been replaced it's the fuel pump. The car had sat for atleast 25+ years, so whatever junk in the tank has clogged the fuel pump.

With that being said the only way to replace the fuel pump is to drop the fuel tank correct?
Click to expand...
Yes it needs to be dropped its not hard, can do it in 2 hours with hand tools if need be. if it sat that long buy new pump, tank and a can of kooler clean, new tanks like $100 if you shop around, pump depends on what ya want but even a 340lph is less then a bill these days. Your going to need air to blow out the fuel lines and rails, the tanks going to be junk from the old fuel pulling water and rotting if it really sat that long, it will just kill a new pump if its got rot inside. kooler clean is meant to flush transmission lines but will work for the fuel line too, disconnect it at the rail and the filter run a can threw it at rail side and the lines from the filter to the tank then blow it out with air from the rail side.. After that put it back together.
 
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Vince305

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Jul 10, 2022
#29
  • Jul 10, 2022
  • #29
rednotch said:
Yes it needs to be dropped its not hard, can do it in 2 hours with hand tools if need be. if it sat that long buy new pump, tank and a can of kooler clean, new tanks like $100 if you shop around, pump depends on what ya want but even a 340lph is less then a bill these days. Your going to need air to blow out the fuel lines and rails, the tanks going to be junk from the old fuel pulling water and rotting if it really sat that long, it will just kill a new pump if its got rot inside. kooler clean is meant to flush transmission lines but will work for the fuel line too, disconnect it at the rail and the filter run a can threw it at rail side and the lines from the filter to the tank then blow it out with air from the rail side.. After that put it back together.
Click to expand...

Thanks for the info, I'll definitely keep all that in mind. Going to have it all worked on in the upcoming weeks and I'll definitely let you know how it goes! Thanks again for the info and tips!
 

Vince305

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Aug 17, 2022
#30
  • Aug 17, 2022
  • #30
Well, finally got the problem fixed and car running like the champs. Ended up finding a guy who specializes in working on Ford Mustangs of all years. So, the problem I had originally may of been like a TFI Module or something real small but one of the two mobile mechanics I had work on it jumper cabled the battery backwards and fried the entire ecu, and other electronic parts. Of course whichever one did it didn't bother to say anything about it.

Anywho, I had all the electronic stuff done, timing and idle adjusted, new 3G Alternator put in, and now it runs perfect. I had the battery tested twice just to be sure that it's fine, and it came back as 100% with no dead cells or any issues. So, I will definitely not be using any mobile mechanics ever again, and just going to this mechanic who specializes in the Foxbody Mustangs that knows what he's doing. Ya live, and ya learn, and I definitely learned this time around. I also very much appreciate all the replies and help I received on this forum post! Thanks again - Vince
 
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EightNineGarage

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#31
  • Aug 17, 2022
  • #31
Yeah, definitely lose the number of those "mechanics". Sorry you had to endure that.
 
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Vince305

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Aug 17, 2022
#32
  • Aug 17, 2022
  • #32
EightNineGarage said:
Yeah, definitely lose the number of those "mechanics". Sorry you had to endure that.
Click to expand...
Yep, already did! If I have any problems down the line I know where to take it! This guy had four other Foxbody Mustang's in his garage he was working on, I knew at that point it was the right place to get the work done!
 
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manicmechanic007

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#33
  • Aug 17, 2022
  • #33
All it will burn is a fuse link or two if you jump it backwards
The processor will survive that
 
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Vince305

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Aug 17, 2022
#34
  • Aug 17, 2022
  • #34
manicmechanic007 said:
All it will burn is a fuse link or two if you jump it backwards
The processor will survive that
Click to expand...
Yep, but somehow it still got other components or they did something to burn other things up? Probably to try to get me to pay them more. It probably destroyed their battery more so than mine, from what I've heard if that's how that works.
 

Potomus Pete

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#35
  • Aug 17, 2022
  • #35
What did you do about the fried ECU
 
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Vince305

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Aug 18, 2022
#36
  • Aug 18, 2022
  • #36
Potomus Pete said:
What did you do about the fried ECU
Click to expand...

The only thing I think you can do which is have it replaced at that point, which it was replaced with a new ECU. I don't think there was any way around that unfortunately.
 

General karthief

wonder how much it would cost to ship you a pair
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#37
  • Aug 19, 2022
  • #37
There are a few places to get the ecu repaired. I use The ECUExchange on Ebay, they have a couple of my spare computers now.
 
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manicmechanic007

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Aug 19, 2022
#38
  • Aug 19, 2022
  • #38
We all need a spare processor in a lead box
Only cars with points will run if some commie sets off a EMP nuke blast over here
 
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jrichker

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#39
  • Aug 20, 2022
  • #39
I'm the guy who wrote the checklist, and I have been driving and fixing pushrod 5.0 EFI Mustangs since 1991.
Do the checklist, you don't have to be a mechanic to understand it and make it work for you.
 
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Vince305

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Aug 20, 2022
#40
  • Aug 20, 2022
  • #40
jrichker said:
I'm the guy who wrote the checklist, and I have been driving and fixing pushrod 5.0 EFI Mustangs since 1991.
Do the checklist, you don't have to be a mechanic to understand it and make it work for you.
Click to expand...
Oh I appreciate it, and that's a great list that like you said works! Unfortunately, it probably would have worked for me at the start when I had the problem but one of those whack mobile mechanics jumper cabled the car backwards and whatever else to fry some of the electronics. I ended up just taking it to a certified mechanic that works on these years of Mustangs and he fixed it all up, runs like a champ now. So the problem is solved and fixed now. Not sure if there is a way to mark this forum/post as solved to let others know it's been fixed/solved? I appreciate it though!
 
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