Still having problems...
Thread Starter
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Senior User
Joined: Dec 2004
Posts: 320
Likes: 0
From: Dallas, Texas
Still having problems...
The 96 F150 5.0L still isn't working right. I've replaced the spark plugs, wires, distributor cap and rotor, ignition cap and rotor, and fuel pump.
it died again today while driving. just turned off pretty much. wouldn't start again for about 10 minutes but then ran like a dream the whole way home.
with all the new parts, it runs amazing...when it will run. its getting pretty frustrating.
went to autozone and had the diognostics test ran but they didn't find anything.
any ideas on what the problem could be?
it died again today while driving. just turned off pretty much. wouldn't start again for about 10 minutes but then ran like a dream the whole way home.
with all the new parts, it runs amazing...when it will run. its getting pretty frustrating.
went to autozone and had the diognostics test ran but they didn't find anything.
any ideas on what the problem could be?
Posting Guru
Joined: Nov 2004
Posts: 2,155
Likes: 1
From: sunny fla sometimes windy
Don't start ***** nilly replacing sensors and wasting money!! I don't know about you
but things are tight$$ for me and besides that is what we are here for to help actually
diagnose problems. Is the motor stalling say when you come up to a stop or a turn
where you have to let off the gas hard? Check for pressure on the fuel rail as soon as
it cuts out, wear goggles and unscrew that cap on the fuel rail and put a screwdriver
on it for a second let us know what you get. Of course have a rag put around the valve and have a fire extinguisher handy and don't put your eyeball or ears next to it!!
but things are tight$$ for me and besides that is what we are here for to help actually
diagnose problems. Is the motor stalling say when you come up to a stop or a turn
where you have to let off the gas hard? Check for pressure on the fuel rail as soon as
it cuts out, wear goggles and unscrew that cap on the fuel rail and put a screwdriver
on it for a second let us know what you get. Of course have a rag put around the valve and have a fire extinguisher handy and don't put your eyeball or ears next to it!!
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
Originally Posted by WoomaHodal
I'm pretty sure its some sort of ignition problem. how do I know if the fuel pump cycles?
Thread Starter
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Senior User
Joined: Dec 2004
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From: Dallas, Texas
Originally Posted by Conanski
Open the door and turn the key to on.. but do not start. You should be able to hear the pump for a second or 2. If you don't you have an electrical problem, either the fuel pump relay is bad or a wire has corroded off(I had this), or the pump has failed.
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Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Originally Posted by blue beast
Don't start ***** nilly replacing sensors and wasting money!! !
Sometimes thats the only way to fix problems like this. Especially when repair shops charge $50+ per hour to do the same thing. You can buy all the sensors for less than $100.
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Senior User
Joined: Dec 2004
Posts: 320
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From: Dallas, Texas
Originally Posted by Kemicalburns
I would scan codes yourself. www.fordfuelinjection.com has instructions.
Postmaster
Joined: Jun 2005
Posts: 2,656
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when it dies pull a plug wire off at the cap and see if you have spark.. just hold it over the hole about 1/2 and crank it over it should spark... and if you have no spark there is a good chance you wont have any fuel pump .... if the pcm is not getting any crank sensor (from the dist.) it wont turn the pump on....
sounds like ignition to me....
sounds like ignition to me....
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Originally Posted by HemiEater
when it dies pull a plug wire off at the cap and see if you have spark.. just hold it over the hole about 1/2 and crank it over it should spark... and if you have no spark there is a good chance you wont have any fuel pump .... if the pcm is not getting any crank sensor (from the dist.) it wont turn the pump on....
sounds like ignition to me....
sounds like ignition to me....
And wear rubber gloves while doing this
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
I got a taste today messing with the 331 in my 77 Comet. It's got a slight miss, so I put on a pair of gloves and stood to where I wasn't touching the car, but that damned Duraspark still managed to give me a just an ever so slight taste. 
of what it's putting out. 
of what it's putting out.
Senior User
Joined: Dec 2002
Posts: 473
Likes: 0
From: SW Florida
We chased an intermittent problem on a 96 F150 with a 300 6 for a long time, sounds similar to your problem. It turned out to be the pickup in the distributor, the plastic part was visibly loose on the metal, just enough to rattle and kill the motor, then when it cooled off it would start right up. It was readily visible once we looked at it after the 100th time it died on the road, and we finally figured this out after replacing all the sensors, fuel filters, tune up, module, etc.
It's probably not any of your sensors, they either work or they don't, and if they don't they trigger a code you can read with your scanner. The F150 is doing fine now, still going strong, 250K.
It's probably not any of your sensors, they either work or they don't, and if they don't they trigger a code you can read with your scanner. The F150 is doing fine now, still going strong, 250K.