North American Turbocoupe Organization



A little help please 1986 tc
Outcast13 Offline
Junior Member
#1
So yesterday I had to replace the fuel pump again because the one I put in went out. I connected it straight to the battery for a second to make sure it works and it dose. Well I put it in the tank and still no power to it. I can't find the relay in the trunk or the reset switch. Is there a fuse or something that is blown maybe? Then there is another issue when I try and put a fuse is 12a it blows it right away any ideas on where to start looking for a bad connection would be great thank you.
Reply

Jeff K Offline
Administrator
#2
Pull the connector off the inertia switch. Is it in good shape or does it have heat damage? Even if looks to be in good shape, jump the connector with a piece of wire and see if the pump runs. If it does, replace inertia switch.

If pump still doesnt run, check for hot at all times at the FP relay using a test light, not a DMM.

Report back with the results and we can go from there.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

Outcast13 Offline
Junior Member
#3
I can't find my switch. I tore the trunk up looking for it. Do you have an idea where it will be and how do I jump it
Reply

Jeff K Offline
Administrator
#4
Not 100% sure on a 86 TC, but on my 86 5.0 Tbird switch and relay are above the RH rear wheel well behind the trunk lid support structure. Hard to find and hard to get at.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

Outcast13 Offline
Junior Member
#5
What is an ecf power relay
Reply

Jeff K Offline
Administrator
#6
No such thing..... do you mean ECM power relay? If so that is the EEC power relay...... Powers up the engine control computer.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

B Offline
Administrator
#7
Jeff K Wrote:Not 100% sure on a 86 TC, but on my 86 5.0 Tbird switch and relay are above the RH rear wheel well behind the trunk lid support structure. Hard to find and hard to get at.
This is where it is on my '86 as well.
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
Reply

Outcast13 Offline
Junior Member
#8
I have not had any time to mess with it right. My daily driver broke down and I need to get that fixed first so I can make it to work. It should be fixed soon. The. I'll start ripping into it again thanks guys for all the help. If you look in the chiltion manual it's there as ecf power relay.
Reply

FastN'Fried Offline
Senior Member
#9
If he is blowing fuses, I don't think the inertia switch is tripped.

Outcast, do you have a multi meter? If so, power the car up to the RUN position and set it to Direct Current Voltage (DCV on my meter) and connect the leads to the pump wiring. Polarity will not matter, you will simply see a negative if they are hooked up backwards to the meter.

If you have 0V, depower the car, you will need to find the inertia switch. Place your meter in Continuity Mode (Looks like a diode on my meter, similar to this: ->- ) and attach the leads to the inertia switch wires. You should hear a tone, if not try depressing the switch in an attempt to re-latch it and test again.

You can also test the inertia switch for voltage. In the same fashion as the fuel pump, power up the car in the RUN position and set your meter to DCV. Attach the leads to the switch wiring and see what you have.

When you get a chance, try that out. If you have no voltage at your inertia switch post back and we can see where to go next!

Hope this helps :beer:

As a note: Measure resistance across the fuel pump. Place the meter in the ohms mode and place the leads on the fuel pump leads. Take your voltage (12v, technically 14.7 with a good alt.) and divide it by the resistance. 12/R. This will give you the amount of amps pulled and you can decide if your 12A fuse is too small.
1988 Canyon Red Turbo Coupe
Carrillo pistons +.030, ARP hardware, 3in exhaust, and a magnaflow
Reply

Jeff K Offline
Administrator
#10
Measuring FP ohms tell you almost nothing. Doing so results in around 1 ohm. Ohms Law doesnt work in this case since when the pump is running, it develops a "back EMF" that limits the current thru the windings. Only way to accurately measure pump amp draw is to use an ammeter when the pump is running and supplying pressure.

There are no fuses in the fuel pump circuit.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply





Users browsing this thread:
1 Guest(s)



Theme © iAndrew 2018 - Software MyBB