Fuel Pump Secondary Failure

95Cobra302 · Dec 2, 2010

That's the code I got and because of the problem, haven't driven my cobra in more than a year. Starts fine but can barely accelerate. Replaced Cap and Rotor, Plugs, and few other things. Need to figure this out so I can drive the thing again.

Zero Signal · Dec 3, 2010

Did you leave the old gas in the tank for that long? You may be in need of a tank cleaning and new pump assembly with fresh gas and plenty of injector cleaner.

95Cobra302 · Dec 3, 2010

The gas was in there awhile, but I always add Stabil to it. Put an MSD coil on it 4 years ago, not sure if that could cause a problem or not.

davro6 · Dec 12, 2010

If the fuel pump is stock, it needs replaced after 15 years of service. Replace the fuel filter at the same time.

revhead347 · Dec 12, 2010

95Cobra302 said:
The gas was in there awhile, but I always add Stabil to it. Put an MSD coil on it 4 years ago, not sure if that could cause a problem or not.

Every time I had a coil go bad, the car wouldn't start at all.

Kurt

95Cobra302 · Dec 12, 2010

Yeah, the PIP is probably on the way out for sure.

toyman · Dec 12, 2010

Cleaned the MAF sensor recently? Also, does the distributor advance when you increase the rpm's? Does the TPS signal voltage increase as the TB opens? While the PIP may need replacing that doesn't sound like the problem to me.

95Cobra302 · Dec 13, 2010

Yeah, just cleaned the maf. It's a spark issue for sure. Hooked a timing light up and couldn't even get the #1 plug to fire the light against the pointer. It took quite awhile.

BlownFiveLiter · Dec 13, 2010

davro6 said:
If the fuel pump is stock, it needs replaced after 15 years of service. Replace the fuel filter at the same time.

This is terrible advice. The solution isn't throwing parts at a problem and hoping for the best, without any sort of diagnosis of what might be the problem.

toyman · Dec 13, 2010

95Cobra302 said:
Yeah, just cleaned the maf. It's a spark issue for sure. Hooked a timing light up and couldn't even get the #1 plug to fire the light against the pointer. It took quite awhile.

I'm confused. In your first post you stated

Starts fine but can barely accelerate.

Are you now saying that it starts and idles but the timing light doesn't flash?

Or are you saying it took a lot of cranking before it fired?

Dino Dino Bambino · Dec 14, 2010

Does the engine crank but not start, does it start but idle roughly, or does it start and idle well but splutters when you rev it up?
A clearer explanation of the symptoms would help us pinpoint the problem.

95Cobra302 · Dec 15, 2010

Starts fine, but when you rev it there is a miss. You can't get it up to speed, but if you chug it around for 10 min the rpm jumps up a little and then it seems to be fine for a little bit. Then it will start missing badly again.

Chythar · Dec 15, 2010

I had the same thing in my Cobra clone, and in a similar situation - old gas in the tank. Here's a video of the first time I tried to start it:

YouTube - 1994 Mustang Cobra - First Engine Start

Part of that was bad gas, but that mostly cleared up by the end of the video. However, the idle never really got any better, it always started rough. The main problem turned out to be the PIP in the distributor. Swapped the dizzy out as a test and the engine started right up and settled to a nice purr immediately.

If you have a Mustang friend nearby and he'll let you borrow his distributor, swap it out and see if the problem goes away. If not, you can buy one from your local parts store and return it if the problem doesn't go away.

Fuel Pump Secondary Failure

95Cobra302

Zero Signal

Active Member

95Cobra302

davro6

New Member

revhead347

Apparently my ex-husband made that mistake.

95Cobra302

toyman

95Cobra302

BlownFiveLiter

have car, will race....wait, it doesn't run

toyman

Dino Dino Bambino

95Cobra302

Chythar

Recently finished repairing my rear

Similar threads

Fuel Pump Secondary Failure

Active Member

New Member

Apparently my ex-husband made that mistake.

have car, will race....wait, it doesn't run

Recently finished repairing my rear

Similar threads

Privacy & Transparency

Privacy & Transparency