7M-GTE Idle probs???

[stalker]

Does anyone know what would cause this problem?

When the engine is idling the revs go up and down...im not touching the accelerator or anything, but the revs will go up to 1500rpm, then drop down to 700rmp, then back up etc...and continues to do that the whole time.
any ideas?

[deaf_rattle]

join up to www.supras.org.nz and sign up to the mailing list

sounds like your idle bypass control valve is faulty.

[stalker]

join up to www.supras.org.nz and sign up to the mailing list

Yea i will...just waiting to get a supra first.
Then i can add my name to the suprafest list too (if theres still room of course)


And thanx for that info...thinkin i go looking for one with a 1JZ me thinks.
(might have found a good one to go look at)

[Jason T]

Does anyone know what would cause this problem?

When the engine is idling the revs go up and down...im not touching the accelerator or anything, but the revs will go up to 1500rpm, then drop down to 700rmp, then back up etc...and continues to do that the whole time.
any ideas?

Vacum leak.
Check all intercooler hoses 1st from turbo or join at throtle body
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=16
You need to keep this site