1jzgte idle and clutch issue

[Goodbarsix]

Yo,
I own a 1987 Supra with a 1jzgte and a r154 5 speed. All the basic bolt-ons: intake, y-pipe, exhaust, stage 2 clutch, FMIC, SAFC, etc...

Here are the symptoms:
-On cold start, the engine idles around 500rpm without ever going through a high-idle warm-up.
-Once warm, the car idles around 500-600rpm.
-The car feels like it is slower than usual.
-When the clutch is depressed, the idle drops 100rpm's.
-The clutch system will not bleed correctly. I have to pump the clutch to get any pressure after bleeding multiple times. (side note, what car do I get a slave cylinder from for the r-154?)

I just replaced the alternator with a 1993 sc300 unit, and the battery is a brand new optima redtop. I cleaned the idle control deal at the back of the intake manifold as well. I cannot find any vacuum leaks, but I am not ruling that out.

Any ideas are much appreciated!
Thanks
Tyler

 

[SupraStardom]

Pretty sure any 86-92 supra turbo slave cylinder should work. It sounds like a slave cylinder or a master cylinder problem.

 

[joey_daze]

Pretty sure any 86-92 supra turbo slave cylinder should work. It sounds like a slave cylinder or a master cylinder problem.

And you are correct sir

 

[Goodbarsix]

I have a replacement master and slave cylinder purchased, but only the master looks like it will work. The slave cylinder looks totally different.
Any pictures?

 

[OneJArpus]

Master Cyl
www.driftmotion.com
Price $55.00
Description: Clutch master cylinder for MK3 Supra (Only fits 1986.5 to 1990 Supra). Aisin (Japanese) brand, exactly the same as from the Toyota dealer but a lot less money! We recommend changing the master and slave cylinder at the same time
Direct Link: http://store.driftmotion.com/productdetails.php?sid=145f76e602dc6d&product_id_int=365

Slave Cyl:
www.driftmotion.com
Price $45.00
Description:Clutch slave cylinder for R154 Supra transmission. Aisin (Japanese) brand, exactly like from the Toyota dealer but for a lot less money! We recommend changing the master and slave cylinder at the same time.
Direct Link:http://store.driftmotion.com/productdetails.php?sid=145f76e602dc6d&product_id_int=366

 

[jza71]

Your idle issue maybe that you have a warp clutch pressure plate or it is the end of your crank(crank walk).

 

[OneJoeZee]

Your idle issue maybe that you have a warp clutch pressure plate or it is the end of your crank(crank walk).

Was just about to mention that and link to the big thread on SF in the MKIV forum about it... but SF is down so I can't.

 

[annoyingrob]

your ISCV could be stuck closed too. Mine had the same symptoms when that happened.

 

[Goodbarsix]

Master Cyl
www.driftmotion.com
Price $55.00
Description: Clutch master cylinder for MK3 Supra (Only fits 1986.5 to 1990 Supra). Aisin (Japanese) brand, exactly the same as from the Toyota dealer but a lot less money! We recommend changing the master and slave cylinder at the same time
Direct Link: http://store.driftmotion.com/productdetails.php?sid=145f76e602dc6d&product_id_int=365

Slave Cyl:
www.driftmotion.com
Price $45.00
Description:Clutch slave cylinder for R154 Supra transmission. Aisin (Japanese) brand, exactly like from the Toyota dealer but for a lot less money! We recommend changing the master and slave cylinder at the same time.
Direct Link:http://store.driftmotion.com/productdetails.php?sid=145f76e602dc6d&product_id_int=366

Very cool, thanks for the link!

I will get that new slave put on, and go from there. I cleaned out the idle control valve already so I am not leaning towards that. The crank walk thing has me nervous...looking forward to finding that thread once SF is back up and running.

Thanks guys!

 

[Goodbarsix]

Ow yea, that crank went for a walk.

Pressing the clutch in drops the idle and moves the crank pulley forward and back. SUPER!

 

[OneJoeZee]

Knew it... sucks man. You might want to try a twin plate clutch next time.

Did you have the clutch switch bypassed?

 

[steven89]

Knew it... sucks man. You might want to try a twin plate clutch next time.

Did you have the clutch switch bypassed?

**OFFTOPIC** hahah hilarious pic.. did ya get it offa DSM site?

 

[OneJoeZee]

Don't remember. I've had it on in my pic folder probably at least 4 years or so. but yeah, it is a DSM crank

 

[Goodbarsix]

Ill be making a clutch switch bypass this go-around .

Ill probably just end up going 1.5jz. I just need to source a good 2j block.

 

[annoyingrob]

I have the original pic that crank is from, shows it walking away from the DSM

 

[OneJoeZee]

I have the original pic that crank is from, shows it walking away from the DSM

http://i7.tinypic.com/2d1wzuf.jpg

 

[annoyingrob]

http://i7.tinypic.com/2d1wzuf.jpg

Yeah, that's it. haha.

Se crank. See crank walk. Walk crank, walk.

 

[foreverpsycotic]

goodbar, do your wallet a favor and get a 2jz-ge instead of a 2jzgte, a thicker HG will solve the compression ratio problem.

 

[hottscennessey]

^PSH, everyone knows the GE is inferior!











Why? IDK.. just because.

 

[annoyingrob]

the only differences between the GE and GTE blocks are the lack of oil squirters on the GE block, different pistons creating a higher comp ratio (but a 2JZ-GTE HG will bring this down to almost the right comp ratio), and the oil feeds for the turbos are not tapped.

And NA-T guys run without oil squirters and make 600+hp no problem. Most aftermarket pistons don't even have cutouts for the squirters anyways, so if you go aftermarket, you would need to remove them anyways.

Block crank and rods have been proven to be the same.