Help! Post-rebuild engine problems!

Tony · 10-23-2009, 09:24 AM

Hey everyone,

I bought my 88 Supra Turbo with a BHG a while back, and have since done the following to it:

New HG and upper gasket set
ARP Bolts (70ft/lb)
Different turbo head purchased (old was warped .020")
Head machined flat, checked, and valves reseated
Set of completely refurbished fuel injectors (ultrasonically cleaned and flow tested)
Vacuum systed completely gone through and everything is properly connected.
Also tested every coil pack for spark (looked for spark in a removed plug attached to each coil pack)

Feels like a cylinder or two isn't firing.
Here's a video (don't mind the squeak, alternator belt is not tensioned all the way)

http://www.youtube.com/watch?v=1BudtjtPh70

The car starts but runs terribly, once the RPMs go past 2500, all power is lost until it drops below that.
If you keep the accelerator floored, it will go up past 2500 RPMS, then fall back to it over and over.

Can someone help me?
I want to get this thing on the road!

cre · 10-24-2009, 12:09 AM

Double check the mechanical timing (crank, cams and CPS), if that's all square, check the ignition timing.

Any error codes?

CanadianBak'inSupra · 10-24-2009, 01:46 AM

i agree chek the error codes...
simple and a start...

86.5supra · 10-24-2009, 03:05 PM

your getting a fuel cut out my 7mgte did it after we had it rebuilt. after they tore the motor back apart we found out that it was a O2 sensor that was fucking up the computer.

CanadianBak'inSupra · 10-24-2009, 03:53 PM

Quote:

Originally Posted by 86.5supra

your getting a fuel cut out my 7mgte did it after we had it rebuilt. after they tore the motor back apart we found out that it was a O2 sensor that was fucking up the computer.

not tryin to topic steal, but how many sensors does the engine have (for a non turbo)
i wouldnt mind getting all mine checked

ricerbaby · 10-24-2009, 06:24 PM

having the same problem at the moment.. my 88 is doing the same thing. it sounds just like a computer problem, i had a broken coolant hose and it threw coolant and water all over the engine and it got in my cpu which made my car do the same thing. a new cpu unit is pretty expensive... but you can look for one on ebay too...

10-23-2009, 09:24 AM	#1
Tony Stock Join Date: Aug 2009 Location: Indiana Posts: 15	Help! Post-rebuild engine problems! Hey everyone, I bought my 88 Supra Turbo with a BHG a while back, and have since done the following to it: New HG and upper gasket set ARP Bolts (70ft/lb) Different turbo head purchased (old was warped .020") Head machined flat, checked, and valves reseated Set of completely refurbished fuel injectors (ultrasonically cleaned and flow tested) Vacuum systed completely gone through and everything is properly connected. Also tested every coil pack for spark (looked for spark in a removed plug attached to each coil pack) Feels like a cylinder or two isn't firing. Here's a video (don't mind the squeak, alternator belt is not tensioned all the way) http://www.youtube.com/watch?v=1BudtjtPh70 The car starts but runs terribly, once the RPMs go past 2500, all power is lost until it drops below that. If you keep the accelerator floored, it will go up past 2500 RPMS, then fall back to it over and over. Can someone help me? I want to get this thing on the road!

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10-24-2009, 12:09 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Double check the mechanical timing (crank, cams and CPS), if that's all square, check the ignition timing. Any error codes?

10-24-2009, 01:46 AM	#3
CanadianBak'inSupra Official hall monitor / search nazi - NO SOUP FOR YOU! Join Date: Oct 2009 Location: Canada, BC Posts: 837	i agree chek the error codes... simple and a start...

10-24-2009, 03:05 PM	#4
86.5supra 3" Exhaust Join Date: Jun 2009 Location: ny Posts: 83	your getting a fuel cut out my 7mgte did it after we had it rebuilt. after they tore the motor back apart we found out that it was a O2 sensor that was fucking up the computer.

10-24-2009, 06:24 PM	#6
ricerbaby Stock Join Date: Oct 2009 Location: flower mound texas Posts: 7	having the same problem at the moment.. my 88 is doing the same thing. it sounds just like a computer problem, i had a broken coolant hose and it threw coolant and water all over the engine and it got in my cpu which made my car do the same thing. a new cpu unit is pretty expensive... but you can look for one on ebay too...