Mustang Won't Start

[Woodward_Dreams]

Ok my mustang won't start. It cranks and it has spark, but no luck. The fuel pump relay was clicking and i decided to replace it just to be sure, but that didnt fix it. When cranking the car, the relay keeps clicking on and off. any ideas?

[SpiderGearsMan]

Re: Mustang Won't Start

first - ck for fuel pressure
then spark
them timing
then compression
check the fuel pump connector with a test lamp
probably a puked fuel pump - that car is pretty old

[mustang13]

Re: Mustang Won't Start

Inertia switch or pump, if it made it over with the transplant.

Fuel pump ground at the battery.

Hit it with a wiff of starting fluid to confirm it runs also.

[Woodward_Dreams]

Re: Mustang Won't Start

Ok im thinking pump at this point. when you first turn the key, the pressure goes up to about 30psi then drops pretty fast down to 0.

The engine will run for a few seconds on starting fluid. I guess im dropping the tank tomorrow morning. From what ive heard, its pretty simple on these cars.

[IRONHEAD]

Re: Mustang Won't Start

check that your pump has power after you let off the key from "start" to run..
you might be getting power under the start part of the ign switch but not the run.. and that give you fuel pressure then none..
check for power at pump when key is in the run spot.. before you drop the tank

pumps are dead.. don't build pressure then just die... it sounds like the pump is getting no power in the run key spot..
confirm first then drop the tank..
I think you'll be hunting a wire/power issue not a pump

[SpiderGearsMan]

Re: Mustang Won't Start

don't break the pipes on the sender

[dieselgeek]

Re: Mustang Won't Start

Have you checked the TFI module? they can be bad - and still spark. They spark at 10* by default, but they can still have a fried transistor and not send an RPM signal to the computer, which would cause the same behavior you're seeing with the fuel pump.

[Woodward_Dreams]

Re: Mustang Won't Start

Anyone know where to get new lines from the top of the tank to the steel hard lines? I need to replace both, they're about 2 feet long each. No parts store carries them. Not even the dealer. Any ideas?

[Russell]

Re: Mustang Won't Start

go to napa they can get fuel lines with the right ends on them then you bend them to fit.

[Woodward_Dreams]

Re: Mustang Won't Start

go to napa they can get fuel lines with the right ends on them then you bend them to fit.

The guy at my napa said he couldnt help me with it. so did another parts store.

[redragtop]

Re: Mustang Won't Start

Might have to fab your own. What do they look like?

[IndyShiftman]

Re: Mustang Won't Start

Are they plastic lines? If they are, there are kits that you can get to fab your own. I know Car Quest sells replacement parts for the kit.

[Russell]

Re: Mustang Won't Start

Might be able to call one of the big mustang junk yards and have them send you a used one, or this place has new ones.

http://www.latemodelrestoration.com/...ang-Fuel-Lines

[Woodward_Dreams]

Re: Mustang Won't Start

Might be able to call one of the big mustang junk yards and have them send you a used one, or this place has new ones.

http://www.latemodelrestoration.com/...ang-Fuel-Lines

Thats exactly what i needed. thanks for the link.

[FoFittyFoSS]

Re: Mustang Won't Start

I thought 85's still had carbs? Or was it the first year they were injected? Saw somebody say something about a swap though. Does it have a return line? If it builds pressure then falls to 0 psi, could it be a bad regulator, that bypasses all of the fuel? I may be completely off, curious as to what fixes it. Did you have to beat on the tank to get the pump to run?