North American Turbocoupe Organization



fuel switch
cloud17 Offline
Member
#1
87 turbocoupe auto.........my fuel switch doesn't work. the light dont come on when i put it on premium and when i did put 94 oct and tried it i didnt feel anything different. is there a fuse for that or some way i can fix it? how far does it advance the timing?
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Pete D Offline
Administrator
#2
Maybe the light's burned out. Did you check the timing with a light with the switch in each position, sprout in place.

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NATO Member. it's not a vice, it's an obsession
Good judgement comes from bad experience, and a lot of that comes from bad judgment.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Jeff K Offline
Administrator
#3
There is a fuse, but if your speedo and tach work, the fuse isnt the problem, as the fuel switch / fuel relay are on the same circuit that powers the speedo and tach. I agree with Pete, likely the bulb is just bad.

Drop the glove box door, and near the left side of the opening, you will find the fuel relay (should be medium blue color with 4 wires to it) With the key in the run position, turn the fuel switch on/off while you listen to / feel the relay. The relay should click on and off with the switch.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 02 Taurus Vulcan(wifes car)
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
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cloud17 Offline
Member
#4
i put some 93 octane in it and checked for that noise. didnt hear anything. i also checked the timing just incase and it was still set the same. can anyone help me?
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cloud17 Offline
Member
#5
oh bye the way thanks jeff for all that info you sent me. mine was running 18psi in 1st n 2nd and 15psi in 3rd n 4th. im gonna try and hook it up like you said for full boost in all gears this weekend.
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mustanglover32 Offline
Member
#6
Quote:Originally posted by Pete D:
Maybe the light's burned out. Did you check the timing with a light with the switch in each position, sprout in place.


Ya mean that the fuel switch changes the base idle??? Well no friggin wonder my timing seemed off!! BTW, about how many degrees are we talking here between reg and preium?

later,
david
Wings are for planes!!! (I would know I fly them!)
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TurboCoupe50 Offline
Posting Freak
#7
Quote:Originally posted by Jeff K:
Drop the glove box door, and near the left side of the opening, you will find the fuel relay (should be medium blue color with 4 wires to it) With the key in the run position, turn the fuel switch on/off while you listen to / feel the relay. The relay should click on and off with the switch.


You can't hear/feel that relay click. It doesn't have a std coil and contact arrangement. It has a reed relay inside a coil with a 56 ohm resistor in series with the contacts. I found this out, when I wired up my prem fuel switch to arm my nitrous system. Needless to say my relay died with the explority sugery.
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Three 1988 Turbo Coupes .....
yea one of em has a 5.0 And runs 13.1s......
uhhh make that [email protected] with a 90hp shot of nitrous.

[This message has been edited by TurboCoupe50 (edited 05-15-2003).]
1988 Turbo Coupe331 AOD

1972 Comet GT

1969 Fairlane Cobra 428CJ 4-Speed
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Jeff K Offline
Administrator
#8
Tom, I can hear the relat click in my TC if it is dead quiet inside the car, and I put my head a few inches from the relay and operate the fuel switch. Of course, a better way to test it is to use an ohm meter to see if it grounds (to SIG RETURN) the corresponding pin on the EEC (pin 34??? I dont remember off the top of my head).

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 02 Taurus Vulcan(wifes car)
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
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TurboCoupe50 Offline
Posting Freak
#9
Dang Jeff, you must have some good hearing! (I can't hear for crap anyway).
1988 Turbo Coupe331 AOD

1972 Comet GT

1969 Fairlane Cobra 428CJ 4-Speed
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