North American Turbocoupe Organization



Drillin the throttle body
Import Killer Offline
Senior Member
#1
If I drilled a hole in my thottle body (the butterfly or whatever) would that drop my idle?
1987 Turbocoupe
Painted sonic blue pearl
Ground effects w/S351 wing
17x9 Chrome Cobra Rs
255/45/ZR17 Kumho 712s
KYB suspension
MOMO shift knob and boot
K&N cone air filter, Gillis boost valve, T-3 turbo, ported intake and E6, A237 roller cam, MSD coil, Kirban FPR
Full 3" exhuast w/Ultra Flo muffler
Brute force clutch
White faced indiglo gauges
2 12" Rockford Fosgate subs and amp
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Pete D Offline
Administrator
#2
Probably not. Why do you want to drop your idle?

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NATO Member. it's not a vice, it's an obsession
"The nice thing about each new day is nobody ever used it before" Barnaby Jones
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Import Killer Offline
Senior Member
#3
Well, after a few minutes of driving, my car idles at 2K i need it to drop and i cant figure out how
1987 Turbocoupe
Painted sonic blue pearl
Ground effects w/S351 wing
17x9 Chrome Cobra Rs
255/45/ZR17 Kumho 712s
KYB suspension
MOMO shift knob and boot
K&N cone air filter, Gillis boost valve, T-3 turbo, ported intake and E6, A237 roller cam, MSD coil, Kirban FPR
Full 3" exhuast w/Ultra Flo muffler
Brute force clutch
White faced indiglo gauges
2 12" Rockford Fosgate subs and amp
Reply

SteveX82 Offline
Posting Freak
#4
Did you try *setting* the idle? That's usually the best place to start before randomly drilling holes [Image: smile.gif]

Go here for the instructions: http://www.turbotbird.com/techinfo/idlet...tment.html
Estoril blue 1987 TC 5spd, 148k mi, a237, Bailey BOV, spec stg3 clutch, spearco FMIC, 50 trim t3/t4, 3" exhaust, Bamafuel, LM1, 55pph
Best 1/4 mile: 12.31 @ 110mph on 25psi
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JO346820 Offline
Member
#5
My car for months was idling like crazy, going up to 2000 or above sometimes, randomly moving about. Replaced the Throttle positioning sensor ( TPS ) and fixed that, the engine light, and my random stalling when I was shifting into neutral.

-Joe
127k miles in January when I bought it for $200. 138k now. A few mods for more power in the planning. (:
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dadsturbocoupe Offline
Member
#6
Wow. Please, in the furure, promise you will ask here BEFORE doing ANYTHING. Drilling holes in the throttle plate is way off. Would probably cause more 'imbalance' in the way the car runs, since these things are full of sensors that actually control how it runs. Ask here, and ye shall recieve..........good advice. Please.

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87 5-sp, black/red leather. Every option but sunroof.
95 Impala SS Grey/green metallic(was wifes car) FOR SALE
91 Caprice wagon (tricked out for the wife-refused to purchase a minivan)
66 Mustang convt w/5.0 AOD conversion, 4 wheel discs.
73 Mazda Rx2, 220 H.P ported 13B (sorry-it'll pull a bird, unless she was really hopped up)
74 Chev 1/2 ton p/u completely gone through (cause ya gotta have something to carry parts in!)
All living in my 40X72X12 shop. Sweet.
87 5-sp, black/red leather. Every option but sunroof.
91 Caprice wagon
66 Mustang convt w/5.0 AOD conversion, 4 wheel discs.
73 Mazda Rx2, 220 H.P ported 13B 74 Chev 1/2 ton p/u completely gone through (cause ya gotta have something to carry parts in!)
71 Datsun 510, race car/street car, father/son project.
2000 BMW 540iT. Beautiful car.
All living in my 40X72X12 shop. Sweet.
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Import Killer Offline
Senior Member
#7
Well i know we replaced the air bypass valve, i dont think i checked that out yet, ill try it. Oh yea, i wouldnt do anything crazy before asking the experts.
1987 Turbocoupe
Painted sonic blue pearl
Ground effects w/S351 wing
17x9 Chrome Cobra Rs
255/45/ZR17 Kumho 712s
KYB suspension
MOMO shift knob and boot
K&N cone air filter, Gillis boost valve, T-3 turbo, ported intake and E6, A237 roller cam, MSD coil, Kirban FPR
Full 3" exhuast w/Ultra Flo muffler
Brute force clutch
White faced indiglo gauges
2 12" Rockford Fosgate subs and amp
Reply

Jeff K Offline
Administrator
#8
Drilling a hole in the butterfly will let MORE air in, which will increase idle speed even more!

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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 // 00 Windstar (wifes vehicle)
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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DrPhang Offline
Senior Member
#9
dude I would bet my nutsack it's the TPS I had the same prob! get a new one and calibrate it.
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TurboE Offline
Posting Freak
#10
I agree with Jeff, more air = higher idle. I had an similar idle problem and it would stall in traffic situations because i would let off and push the clutch and brake and it would stall unless i put the clutch in, brake in, and sort of got the gas pedal to keep it running. I talked to a good ford mechanic that knows these cars, and he said clean the trottle body. So i got carb cleaner and sandpaper and scotch pad and cleaned the small amount of carbon from inside the trottle body and it worked perfect again. Seemed to be rediculous that would make a difference but it did. Try it, doesnt take long and its very cheap. Good luck.
-88 TC Black
5spd, Precision SC50 T3/T4, QH/SD Tune, Gillis, AFPR, 255FP, WB O2, K&N, Ported E6, 3" DP, ATR 2.5" Duals, 3:73 Rear, Konis, Eibachs, 18" Voxx Wheels, X Drilled Rotors.
-06 G35 Coupe Diamond Graphite
-97 Pathfinder
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