rpm don't go past 3500-4000 range

Kou Vang · 09-11-2006, 05:36 AM

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?

jfunez · 09-12-2006, 03:56 AM

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

Kou Vang · 09-12-2006, 05:52 AM

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?

mrnickleye · 09-12-2006, 06:15 AM

Check the timing belt alignment. Even one tooth off can cost you power and revs.

Kou Vang · 09-13-2006, 03:25 AM

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.

mrnickleye · 09-13-2006, 05:47 AM

A plugged exhaust will create too much back pressure and wont let you rev up.

theWeezL · 09-13-2006, 08:22 AM

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.

Isphius · 09-13-2006, 03:39 PM

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.

Kou Vang · 09-14-2006, 06:37 AM

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?

mrnickleye · 09-14-2006, 06:50 AM

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.

09-11-2006, 05:36 AM	#1
Kou Vang Stock Join Date: Dec 2005 Posts: 5	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?

09-12-2006, 06:15 AM	#4
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Check the timing belt alignment. Even one tooth off can cost you power and revs. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

09-13-2006, 05:47 AM	#6
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	A plugged exhaust will create too much back pressure and wont let you rev up. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

09-13-2006, 03:39 PM	#8
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	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. __________________ Yay the supra assistant is gone!!! WEEE!!

09-14-2006, 06:50 AM	#10
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	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. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

09-12-2006, 03:56 AM	#2
jfunez 12psi boost Join Date: Oct 2005 Location: georgia,usa Posts: 338	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

09-12-2006, 05:52 AM	#3
Kou Vang Stock Join Date: Dec 2005 Posts: 5	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?

09-13-2006, 03:25 AM	#5
Kou Vang Stock Join Date: Dec 2005 Posts: 5	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.

09-14-2006, 06:37 AM	#9
Kou Vang Stock Join Date: Dec 2005 Posts: 5	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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