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#303750 Oct 19, 1:53am
Joined: Feb 2004
Posts: 7
New Member
1992 Toyota Celica GT
New Member
1992 Toyota Celica GT
Joined: Feb 2004
Posts: 7
OK so I'm dead broke and my 1991 celica is going crazy on me. It idles at around 1500 rpm when warm AND waits 2-3 seconds after letting go of the throttle to drop the rpms. When the engine is cold if I just tap on the gas pedal, the rpm shoot right up and when the rpm drop the go down to about 800-900 and bounce right back up to idling at 1200-1500.

Makes driving a pain in the ass (it's a manual). Has this happened to anyone or any suggestions on what it could be? I have checked the vacuum lines, cleaned the throttle body, and no error codes appear. It's quite the riddle...

Joined: Nov 2003
Posts: 1,363
Who's yo Daddy?
2000 Toyota Celica GT
Who's yo Daddy?
2000 Toyota Celica GT
Joined: Nov 2003
Posts: 1,363
Im not sure but i hope someone can help ya!

Joined: Jan 2004
Posts: 2,371
SHO - NUFF
2003 Toyota Celica GT
SHO - NUFF
2003 Toyota Celica GT
Joined: Jan 2004
Posts: 2,371
CHANge your timing belt / chain!!!!!! and you may want to look into a new clutch

Joined: Oct 2003
Posts: 3,037
Specialist
2000 Toyota Celica
Specialist
2000 Toyota Celica
Joined: Oct 2003
Posts: 3,037
^^^^^^ wat he said

Joined: Sep 2004
Posts: 245
Member
2001 Toyota Celica GT
Member
2001 Toyota Celica GT
Joined: Sep 2004
Posts: 245
SEAFOAM the biiiotch grin

Joined: Jan 2004
Posts: 744
Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Jan 2004
Posts: 744
Bad throttle position sensor?

Joined: Jun 2004
Posts: 262
GT4
Member
1993 Toyota Celica Alltrac
Member
1993 Toyota Celica Alltrac
Joined: Jun 2004
Posts: 262
Check your ISC (Idle speed control) valve, have you tried to adjust the idle? and BTW, replacing timing belt or clutch will not fix the rough idle.


93 ST185, 91 ST185 (sold), 99 Solara SEV6
Boston

Joined: Feb 2004
Posts: 7
New Member
1992 Toyota Celica GT
New Member
1992 Toyota Celica GT
Joined: Feb 2004
Posts: 7
I dont think it's the throttle position sensor because even when unplugged the rpm's dont drop. My suspicion is that it has something the EGR system. Its definitely not the clutch or timing belt. I've looked everywhere for seafoam but seams impossible to find here in Vancouver, canada. I've got the car behaving much better after cleaning/replacing some hoses. I think a little seafoam would finish the job grin

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Erick
Erick
2001 Toyota Celica GT
Bay Area, CA

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