Remedial EFI help
Thread Starter
|
Post Fiend
Joined: Nov 2008
Posts: 23,849
Likes: 20
From: McKenzie River
Remedial EFI help
I have a 87 B2 2.9 5sp I am trying to resurrect from the dead. The body is beautiful, but it sat for unknown reasons for 3 years in the blackberries until I came along. The wiring is a hacked mess but it seems to be limited to the lighting circuit and I seem to have it sorted out. Finally got to get it to turn over great with the starter, has HOT spark, but is getting NO fuel.......pump in tank does not run, no fuel/press. in fuel rail, no power at inertia switch, all fuses are good....The entire fuel system seems dead.
I am NOT a EFI guy........I know and prefer carbs, please help a EFI idiot, I have no idea where to start electrically, and do not want to burn this thing to the ground trying. No schematics I can find even hint at power to the fuel pump, I have never had EFI on any other rigs give me trouble, so no experience.
Thanks in advance.
I am NOT a EFI guy........I know and prefer carbs, please help a EFI idiot, I have no idea where to start electrically, and do not want to burn this thing to the ground trying. No schematics I can find even hint at power to the fuel pump, I have never had EFI on any other rigs give me trouble, so no experience.
Thanks in advance.
Cargo Master
Joined: Apr 2001
Posts: 2,220
Likes: 26
You will have to make friends with the EFI schematics and search this and the rangerstation forums. There is plenty of info in both places because relay and pump problems are common.
What I do it to carefully pop off the covers of the appropriate EEC power and fuel pump relays with a small flat screwdriver so I can observe if they operate.
You can then switch them manually by pressing the contacts together with a screwdriver handle or other hunk of plastic.
I collect extra relays for troubleshooting when I'm in salvage yards.
What I do it to carefully pop off the covers of the appropriate EEC power and fuel pump relays with a small flat screwdriver so I can observe if they operate.
You can then switch them manually by pressing the contacts together with a screwdriver handle or other hunk of plastic.
I collect extra relays for troubleshooting when I'm in salvage yards.
Thread Starter
|
Post Fiend
Joined: Nov 2008
Posts: 23,849
Likes: 20
From: McKenzie River
I just replaced the fuel pump relay............no luck
I had a hard time telling which is which, ones green, the other brown? The contacts are very similar.......will the EEC relay also result in dead fuel system?
Not sure how to tell if they are operating at all.
I had a hard time telling which is which, ones green, the other brown? The contacts are very similar.......will the EEC relay also result in dead fuel system?
Not sure how to tell if they are operating at all.
Cargo Master
Joined: Apr 2001
Posts: 2,220
Likes: 26
The contacts are very similar.......will the EEC relay also result in dead fuel system?
Not sure how to tell if they are operating at all.
Thread Starter
|
Post Fiend
Joined: Nov 2008
Posts: 23,849
Likes: 20
From: McKenzie River
Well, the relays are cheap, so I will try the EEC relay next.
The hacked wiring was all in the parking light/headlight circuit after some PO shorted and melted the front parking light wires, so I am confident it has nothing to do with this.
I feel I am 12 volts in the right place, away from getting this thing running.........
Gives me anymore grief, I will start looking for a good carbed 2.8, or a 302 swap, too much effort to get a 2.9 running.......grrrrrr
The hacked wiring was all in the parking light/headlight circuit after some PO shorted and melted the front parking light wires, so I am confident it has nothing to do with this.
I feel I am 12 volts in the right place, away from getting this thing running.........
Gives me anymore grief, I will start looking for a good carbed 2.8, or a 302 swap, too much effort to get a 2.9 running.......grrrrrr
Cargo Master
Joined: Apr 2001
Posts: 2,220
Likes: 26
If you are going for a fresh relay anyway, open the old ones and use them as indicators.
What to the relays actually do when exposed? Move? Not move? What happens when you hold the EEC relay down?
You can also bypass the CONTROL portion of the relay by using a switch wired to a couple of blade connectors to jump the POWER pins.
Replacement won't tell you what they are DOING if it still doesn't run.
Once you get the hang of it you will be able to troubleshoot a variety of Fords.
What to the relays actually do when exposed? Move? Not move? What happens when you hold the EEC relay down?
You can also bypass the CONTROL portion of the relay by using a switch wired to a couple of blade connectors to jump the POWER pins.
Replacement won't tell you what they are DOING if it still doesn't run.
Gives me anymore grief, I will start looking for a good carbed 2.8, or a 302 swap, too much effort to get a 2.9 running.......grrrrrr
Thread Starter
|
Post Fiend
Joined: Nov 2008
Posts: 23,849
Likes: 20
From: McKenzie River
Well the one I replaced was swimming in water and rust!........NO movement possible, if the EEC relay looks the same, this may be it.
The protective cover that Ford puts over the relays where they are mounted is MIA, and the relays are laying with the bottoms exposed on the fender liner, under a layer of wet pine needles.
The protective cover that Ford puts over the relays where they are mounted is MIA, and the relays are laying with the bottoms exposed on the fender liner, under a layer of wet pine needles.
Trending Topics
Cargo Master
Joined: Apr 2001
Posts: 2,220
Likes: 26
Zip tie them out of the puddle zone and inspect/clean the socket contacts. The old lithium spray grease trick is a good idea.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Cargo Master
Joined: Apr 2001
Posts: 2,220
Likes: 26
Cargo Master
Joined: Apr 2001
Posts: 2,220
Likes: 26
If you want to here it make fuel pump noises, jump the EEC and the fuel relay power lines. Fuel pump noises are reassuring, though when they are that old it doesn't guarantee long-term fuel delivery!
If you want to know when each gets signal, put the test light across the contacts that drive the relay coil.
Looking at the bright side, by the time you are done you'll be comfortable with troubleshooting.
Check the inertia switch too. I'm from the school of "jumper everything that's a switch" then figure out the rest after the fuel pump runs.
If you want to know when each gets signal, put the test light across the contacts that drive the relay coil.
Looking at the bright side, by the time you are done you'll be comfortable with troubleshooting.
Check the inertia switch too. I'm from the school of "jumper everything that's a switch" then figure out the rest after the fuel pump runs.
Thread Starter
|
Post Fiend
Joined: Nov 2008
Posts: 23,849
Likes: 20
From: McKenzie River
Unfortunately, this rig sits outside.........The wife's rig gets the garage, so as soon as the weather clears I will be back on it.
Any danger of smoking the EEC with all this jumpering?
One lead on the inertia switch did look like it had gotten hot.
Any danger of smoking the EEC with all this jumpering?
One lead on the inertia switch did look like it had gotten hot.
Cargo Master
Joined: Apr 2001
Posts: 2,220
Likes: 26
If you see a lead that looks crispy, then I'd try to find out why. The fuses "should" protect things but stuff happens. The lead may just be old. These trucks are ancient now and can have discolored wiring.
Of course, if I got the vehicle for cheap or free I'd just jumper it on the theory it won't let the magic smoke out unless there's a problem to begin with!
See if this helps:
Inertia Switch How To - Ford Explorer Ranger Enthusiasts "Serious Explorations"®
Of course, if I got the vehicle for cheap or free I'd just jumper it on the theory it won't let the magic smoke out unless there's a problem to begin with!
See if this helps:
Inertia Switch How To - Ford Explorer Ranger Enthusiasts "Serious Explorations"®