Please help!
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New User
Joined: Jan 2015
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Please help!
I have an 87 f150 302 EFi. It started running rich on me one day so i did a full tune up and replaced the distributor. Still no help. It sat for a while as i didnt have time to mess with it. About a year and a half later, it wouldnt start. I ran some more tests and found out i wasnt getting any fuel. I went ahead and replaced the FPR, injectors, filter, pump and tank. It is running now, but very rich and idles no problem. After i shut it off, and try to start it again, It just turns over and over. If i let it sit for about 10 minutes, it will fire right up.
Could it be the distributor is off? Any help is appreciated. Thanks in advance!!!
Could it be the distributor is off? Any help is appreciated. Thanks in advance!!!
Senior User
Joined: Feb 2014
Posts: 201
Likes: 0
From: Monroe, NY
Could be a bunch of things considering what you did. Check the free things first...Maybe you fouled the plugs, plug wires might not be routed right, changing your firing order. Check them all as well as the plugs and remove the negative on your battery for a few minutes to reset the computer. Do you smell any gas from the front? Maybe a leaking injector. Did you check your timing? Run the truck at night to see if you notice any sparks out of the wires/cap area. Do you have your filter in the right direction? Check your grounds for the fuel pump, fuel/spark related parts? Free first...Since it was sitting for a while, it wouldnt be a bad idea to run a fuel additive too.
Fleet Mechanic
Joined: Mar 2014
Posts: 1,926
Likes: 116
From: Saskatchewan Canada
It is possible that you have an ECU problem, but the likelihood is very remote. Does your Grandpa have some history on the truck that would suggest the ECU is done? Reason I ask is that the truck was running and if it runs at all, the ECU likely is not fried. Changing the ECU is simply throwing parts at it. You might get lucky.
You need to troubleshoot this problem. First, the basics. Fuel, ignition and compression. Which one is missing? Next, check codes. Good info on this process here.
https://www.ford-trucks.com/forums/1...an-eec-iv.html
Your original post mentions changing the distributor. Yes, your timing could be off. Get a manual, or google the process and follow the instructions.
You also must test your fuel pressure. Sounds like you have already changed the components, but a pressure test with a gauge at the fuel rail is a must.
I still would like to know how you determined you engine is running rich?
Good luck!
You need to troubleshoot this problem. First, the basics. Fuel, ignition and compression. Which one is missing? Next, check codes. Good info on this process here.
https://www.ford-trucks.com/forums/1...an-eec-iv.html
Your original post mentions changing the distributor. Yes, your timing could be off. Get a manual, or google the process and follow the instructions.
You also must test your fuel pressure. Sounds like you have already changed the components, but a pressure test with a gauge at the fuel rail is a must.
I still would like to know how you determined you engine is running rich?
Good luck!
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Joined: Jan 2015
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Well, my engine is running like it has a very bad misfire. I've tried a fuel treatment and it seemed to make it worse. I've went over my vacuum diagrams and everything is in place. My stock setting for timing is 10 BTDC. It is at 10 BTDC. I'm at a loss for what to do
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Cargo Master
Joined: Jan 2004
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From: South Dakota
Did you check for spark during that time when i won't start? You need to find out if you don't have spark then or if a rich condition is keeping it from starting during that 10 minutes.
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Cargo Master
Joined: Jan 2004
Posts: 3,118
Likes: 149
From: South Dakota
Have you checked or replaced the ignition parts, spark plugs, spark plug wires and possibly the distributor cap and rotor, as a possible source of the misfire?
Fleet Mechanic
Joined: Mar 2014
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From: Saskatchewan Canada
And we're still waiting for codes.
Senior User
Joined: Jan 2015
Posts: 286
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From: NoVa
Has this been resolved?
Two things come to mind:
1) I once replaced a worn out distributor cap/rotor with a new one. Truck ran great for about a month, and then started having starting problems. After replacing an "intermittent" fuel pump, we discovered that my brand new distributor cap was bad.
2) Once changed out the worn spark plugs on my girlfriend's car. Kind of similar to the above. One of the insulators cracked and the car ran like garbage. But I wouldn't have known it if I hadn't pulled those brand new plugs and inspected them.
Moral - Just because the parts are new, it doesn't mean their good. Nowadays I keep old ignition parts for a month before convincing myself the new parts are working properly.
Two things come to mind:
1) I once replaced a worn out distributor cap/rotor with a new one. Truck ran great for about a month, and then started having starting problems. After replacing an "intermittent" fuel pump, we discovered that my brand new distributor cap was bad.
2) Once changed out the worn spark plugs on my girlfriend's car. Kind of similar to the above. One of the insulators cracked and the car ran like garbage. But I wouldn't have known it if I hadn't pulled those brand new plugs and inspected them.
Moral - Just because the parts are new, it doesn't mean their good. Nowadays I keep old ignition parts for a month before convincing myself the new parts are working properly.
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