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Old 09-11-2006, 06:36 AM   #1
Kou Vang
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Default rpm don't go past 3500-4000 range

I need help please, I have a 88 supra turbo and when i first work on the head gasket I took all the plugs and censor offs, I got the car working nows and every thing is alrights except for the censor that hang off the main harness in the engine bay that goes down and on top of the transmission. Will i can't put that censor bak unless i drop the transmission, kinda obvious but just wondering is that why my supra don't get any power past 3500 range rpm? The car boost at 5-6 alreadys to 3500 but i won't pick up any speed after that. Can that censor be my problem or can it be sumthing else?
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Old 09-12-2006, 04:56 AM   #2
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How Did You Take It Off Anyways? Did You Pull The Trans. Off To Do The Headgasket?

What I Did Was Cut That Wire Instead Of Removing That Sensor...and After I Spliced Back With A Shrinkwrap Butt Conector.

Saves A Lot Of Time
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Old 09-12-2006, 06:52 AM   #3
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Well i just pulled it out, but turns out its not that, that censor is just the back up light switch. I lower the transmission and plug it bak on todays butta the car still runs the same. Still getting that speed cut at 3500-4000 help any1?
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Old 09-12-2006, 07:15 AM   #4
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Check the timing belt alignment. Even one tooth off can cost you power and revs.
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Old 09-13-2006, 04:25 AM   #5
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alrights i'll check on it agains, butta im sure i did it right last tim tho, ofcourse tdc and then just line up the cam gears.
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Old 09-13-2006, 06:47 AM   #6
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A plugged exhaust will create too much back pressure and wont let you rev up.
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Old 09-13-2006, 09:22 AM   #7
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Quote:
Originally Posted by mrnickleye
A plugged exhaust will create too much back pressure and wont let you rev up.
that was what was wrong with my 89. No power, idled smooth but couldnt get the engine to rev over 3000. It would overheat real fast too. If your car over heats at the same time, I recommend checking the exhaust for pluggage.
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Old 09-13-2006, 04:39 PM   #8
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That is what happens to cats when they start to clog up too. Chop it off and replace it with a pipe and see if that helps.
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Old 09-14-2006, 07:37 AM   #9
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alrights when i check the cat are u supose to see right through from 1 end out the other wat i mean is lik u can see the clear light from the other side when looking through it from 1 end? Cause i look in my and it looks like its clooged i can bearly see a little dim light through the other side. does this mean its clooged big time?
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Old 09-14-2006, 07:50 AM   #10
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Yes, on a good cat (in your hands), you should be able to hold it up and look outside the garage (daytime) and see light thru it.
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