jrdcmsw
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Joined:
Jun 2007
new york
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when the rpms reach around 4500 the turbo actually slows down the car. What's going on? It's a 1986 that I bought recently. As far as I know it's never been modified.
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Pete D
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Joined:
Apr 2001
Northern OH
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1. Any unusual noises?
2. Does the car run better with the gas pedal 90% to the floor than at 100% to the floor?
3. take off the compressor inlet tube and check the turbo shaft for side and end play. Do the blades hit the housing in any way?
Pete Dunham
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Jeff K
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Joined:
Apr 2001
Milwaukee, WI
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Check fuel pressure under WOT / boost to be sure it is climbing 1:1 with boost.
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.
11 Crown Vic Interceptor
14 Toyota Camry (wifes car)
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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94Lightning
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Joined:
Mar 2003
Springfield, Missouri
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mine does a similar thing, runs better not floored
1990 LX drag car
1971 Mach 1
1986 GT conv
1990 Mustang GT conv
1986 Turbocoupe
1988 Turbocoupe
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jrdcmsw
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Joined:
Jun 2007
new york
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Thanks everyone.
It definitely runs better not floored. I haven't heard any strange noises from the turbo, but there is a valve tap, which is pretty noisy. I'll check the tube and fuel pressure.
John
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94Lightning
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Joined:
Mar 2003
Springfield, Missouri
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my car also has significant valve/follower tap
1990 LX drag car
1971 Mach 1
1986 GT conv
1990 Mustang GT conv
1986 Turbocoupe
1988 Turbocoupe
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