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Joined: Feb 2004
Posts: 7
oexel
New Member
oexel
1992 black Toyota Celica GT
New Member
1992 Toyota Celica GT

Joined: Feb 2004
Posts: 7
BC, Canada
Oct 19, 1:53am - #303750 
Celica gone haywire!

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: 1,367
10celica10
Who's yo Daddy?
10celica10
2000 Silver Toyota Celica GT
Who's yo Daddy?
2000 Toyota Celica GT

Joined: Nov 2003
Posts: 1,367
Tacoma/Seattle, WA
Oct 19, 2:42am - #303751 
Im not sure but i hope someone can help ya!

Joined: Jan 2004
Posts: 2,373
AZZKIKR
SHO - NUFF
AZZKIKR

SHO - NUFF
2003 Toyota Celica GT

Joined: Jan 2004
Posts: 2,373
ATL GA
Oct 19, 6:08am - #303752 
CHANge your timing belt / chain!!!!!! and you may want to look into a new clutch

Joined: Oct 2003
Posts: 3,038
Clos
Specialist
Clos
2000 Spectra Blue Toyota Celica
Specialist
2000 Toyota Celica

Joined: Oct 2003
Posts: 3,038
Alexandria, VA
Oct 19, 6:10am - #303753 
^^^^^^ wat he said

Joined: Sep 2004
Posts: 245
sxyimports125
Member
sxyimports125

Member
2001 Toyota Celica GT

Joined: Sep 2004
Posts: 245
St. Paul, Minnesota
Oct 19, 9:48pm - #303754 
SEAFOAM the biiiotch grin

Joined: Jan 2004
Posts: 744
Blue_Bomber
Senior Member
Blue_Bomber
2000 Spectra Blue Mica Toyota Celica
Senior Member
2000 Toyota Celica

Joined: Jan 2004
Posts: 744
Freehold, NJ
Oct 19, 10:00pm - #303755 
Bad throttle position sensor?

Joined: Jun 2004
Posts: 264
GT4
Member
GT4

Member
1993 Toyota Celica Alltrac

Joined: Jun 2004
Posts: 264
Boston
Oct 19, 10:57pm - #303756 
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.


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93 ST185, 91 ST185 (sold), 99 Solara SEV6
Boston
Joined: Feb 2004
Posts: 7
oexel
New Member
oexel
1992 black Toyota Celica GT
New Member
1992 Toyota Celica GT

Joined: Feb 2004
Posts: 7
BC, Canada
Oct 22, 9:14pm - #303757 
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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2002 Toyota Celica GT
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