North American Turbocoupe Organization



Any idea
TCtbird88 Offline
Junior Member
#1
Hello I'm new here. I picked up a 1988 tbird TC 5speed and I'm trying to figure out some stuff. First off the car does not idle right and have no idea why also some time I'll go to take off and it'll feel like I'm taking off in second and I'll floor it and it'll take awhile to get up and go. I have a engine light on and the code is for a Vehicle Speed Sensor. What would be the symptoms for that? Anyways thanks for all the info and replys
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Jeff K Offline
Administrator
#2
Are you sure the code is for the VSS? What was the code number? Did you run the complete code test (KOEO, CM, KOER)? VSS isnt used for much with the 5 speed except for dashpot function on decel, speedo speed signal and cruise control.

Please go into more detail on "does not idle right".
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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TCtbird88 Offline
Junior Member
#3
Code that came up was code 54. KOEO . The idle inconsistent
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Jeff K Offline
Administrator
#4
"Idle inconsistent" doesnt tell me much. hI assume you mean the idle speed changes constantly? Have you cleaned out and lubed the IAC? Does the cold high idle work properly? WHen it the idle unstable? WHen cold? when hot? during warmup? All the time?

Was the code 54 a KOEO, CM or KOER code? Does the speedometer work correctly?
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

TCtbird88 Offline
Junior Member
#5
The idle speed changes constantly. When its cold it idlesbrough and will will some times spike up and smooth out and go back down and start idling like crap again. After its warmed up the idle gets a little better. Ihaven't taken the IAC and cleaned or lubed it. It looks like the P.O. replaced it. The engine light code I got were KOEO and they are 54, 27. Sorry if I'm not explaining things well in not good at explaining symptoms.
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Jeff K Offline
Administrator
#6
Motorcraft IAC or aftermarket? ALL aftermarket IAC's are junk. Use ONLY Motorcraft.
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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