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Old 08-04-2010, 02:37 AM   #1
TZimmz
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Default 94 JMD Supra idle problem.

Hey I bought a 94 JMD Supra and its doesnt idle just right.
i heard rumours about maybe it has to be tuned because the
tuning in japan doesnt run just right in North America.
Can anyone give me any direction?
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Old 08-05-2010, 01:23 AM   #2
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Quote:
Originally Posted by TZimmz View Post
Hey I bought a 94 JMD Supra and its doesnt idle just right.
i heard rumours about maybe it has to be tuned because the
tuning in japan doesnt run just right in North America.
Can anyone give me any direction?
TT or N/A? 6spd or auto? Could you post a pic of the engine bay?
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Old 08-05-2010, 03:23 AM   #3
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definatly a 6 spd and definatly twin turbo
it stock with a blitz short ram
and a intercooler piping kit
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Old 08-05-2010, 09:04 PM   #4
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Quote:
Originally Posted by TZimmz View Post
definatly a 6 spd and definatly twin turbo
it stock with a blitz short ram
and a intercooler piping kit
My first suspect would be a vacuum leak ... anywhere within your charge-air system. Most likely you should start with the intercooler piping kit - for example, sometimes a t-bolt clamp can squeeze a pipe so hard as to dent it, which can in turn cause a vacuum leak. Do you have the tools necessary to pressurize your charge-air system?
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Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 08-12-2010, 08:46 AM   #5
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Default Mine too

Mine used to idle funny as well, turns out I had a leaky valve.

Could do a compression test, or unplug the fuel pump and wait for it to stop and crank it. Should have an even turn over, a quicker turn every now and again means bad compression in one cylinder.

Hopefully its not that!
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Old 08-27-2010, 01:00 PM   #6
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I take it you have an aftermarket ECU where you mention tuning in Japan?
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Old 10-22-2010, 06:32 AM   #7
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I'm gonna go with buddy and say its a vacuum leak, and there more a pain in the ass finding, atleast on vw's I haven't worked on a supra yet mines still in the mail, it'll be like christmas when I get that baby.
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Old 10-23-2010, 01:30 PM   #8
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Quote:
Originally Posted by kylej View Post
I'm gonna go with buddy and say its a vacuum leak, and there more a pain in the ass finding, atleast on vw's I haven't worked on a supra yet mines still in the mail, it'll be like christmas when I get that baby.
Finding a vacuum leak is easy - just pressurize the charge-air system.
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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