88 supra still with problems 7MGE - Page 2

Sonyps307 · 02-19-2011, 11:46 PM

U said ur heat is cold. Does ur cruise control Work. If ur cruise control does not work and it did before then u have the vacuum lines crossed on the back of the intake pipe close to the fire wall. That vacuum controls the cruise control and the door that opens to feeds the heater core. that's what happen to me when I rebuild my motor

cre · 02-20-2011, 04:39 AM

Code 41 is a break/short in the THA signal line or a problem with the ECU. Code 51 is the TPS IDL switch (completely different wires), the A/C, or a fault in the ECU. Test the wiring, test the IDL switch for continuity when closed... if possible try another TPS.

The TPS is used to not only trim fueling but also to tell the ECU when the engine is at idle so it can properly modulate the ISCV.

spunkenhimer · 02-23-2011, 11:18 PM

ok i got some youtube.com links for ya

http://www.youtube.com/watch?v=bKE20D4W_zM

http://www.youtube.com/watch?v=ZS0ZiZhUsIg

http://www.youtube.com/watch?v=mIoWKVT8oh8

any help would be appreciated.

cre · 02-24-2011, 01:44 AM

What's the swishing noise? Timing belt not on?

Your TPS is unlikely to be the problem... the short causing the TPS related code 41 may have a lot to do with the problem though if it's in the harness and affecting the voltage at Vc... but you'll get that from your TPS just not being connected.

I would test the AFM thoroughly and verify that both mechanical and ignition timing are dead on. 10?BTDC for the ignition timing and don't forget it must be in diagnostic mode.

spunkenhimer · 02-24-2011, 05:41 AM

so i should put my timing light on the number 6 spark plug distributer cord and see if it hits on 10 not 0.

cre · 02-24-2011, 06:11 AM

It need to be on the #1 plug wire; The GE is not like the GTE where 1 and 6 fire at the same time and either may be used. Yes, it needs to be at 10? not 0?.

Have you verified the mechanical timing is zeroed out?

spunkenhimer · 02-24-2011, 07:44 AM

you mean the timing belt and the crank shaft sprockets?

btwilson86 · 02-24-2011, 08:41 AM

Yes, the harmonic balancer should read 0? and the marks on the cam gears should align with the marks on the rear timing cover (straight up and down). Keep in mind that every other rotation, they will not line up.

Also, this would be a good time to verify the timing belt is properly tensioned; that sound in your video that Cre referred to sounds horrible, and it does seem like it's at the front of the engine.

02-19-2011, 11:46 PM	#11
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	U said ur heat is cold. Does ur cruise control Work. If ur cruise control does not work and it did before then u have the vacuum lines crossed on the back of the intake pipe close to the fire wall. That vacuum controls the cruise control and the door that opens to feeds the heater core. that's what happen to me when I rebuild my motor Last edited by Sonyps307; 02-19-2011 at 11:49 PM.

02-20-2011, 04:39 AM	#12
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Code 41 is a break/short in the THA signal line or a problem with the ECU. Code 51 is the TPS IDL switch (completely different wires), the A/C, or a fault in the ECU. Test the wiring, test the IDL switch for continuity when closed... if possible try another TPS. The TPS is used to not only trim fueling but also to tell the ECU when the engine is at idle so it can properly modulate the ISCV. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-24-2011, 01:44 AM	#14
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	What's the swishing noise? Timing belt not on? Your TPS is unlikely to be the problem... the short causing the TPS related code 41 may have a lot to do with the problem though if it's in the harness and affecting the voltage at Vc... but you'll get that from your TPS just not being connected. I would test the AFM thoroughly and verify that both mechanical and ignition timing are dead on. 10?BTDC for the ignition timing and don't forget it must be in diagnostic mode. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-24-2011, 06:11 AM	#16
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	It need to be on the #1 plug wire; The GE is not like the GTE where 1 and 6 fire at the same time and either may be used. Yes, it needs to be at 10? not 0?. Have you verified the mechanical timing is zeroed out? __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-24-2011, 08:41 AM	#18
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Yes, the harmonic balancer should read 0? and the marks on the cam gears should align with the marks on the rear timing cover (straight up and down). Keep in mind that every other rotation, they will not line up. Also, this would be a good time to verify the timing belt is properly tensioned; that sound in your video that Cre referred to sounds horrible, and it does seem like it's at the front of the engine. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

02-23-2011, 11:18 PM	#13
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	ok i got some youtube.com links for ya http://www.youtube.com/watch?v=bKE20D4W_zM http://www.youtube.com/watch?v=ZS0ZiZhUsIg http://www.youtube.com/watch?v=mIoWKVT8oh8 any help would be appreciated.

02-24-2011, 05:41 AM	#15
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	so i should put my timing light on the number 6 spark plug distributer cord and see if it hits on 10 not 0.

02-24-2011, 07:44 AM	#17
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	you mean the timing belt and the crank shaft sprockets?

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