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Joined: Jun 2004
Posts: 4
New Member
1986 Toyota Celica
New Member
1986 Toyota Celica
Joined: Jun 2004
Posts: 4

First time posting!
Thanks to all who can offer a suggestion.

My friend recently got a used 2000 GTS (60k miles) from a toyota dealer. Intermittently, when the throttle pedal is pressed, there is no response from the engine at all - just sits at idle. After a few seconds and a few presses of the pedal (which feel normal) the engine will begin to respond normally. It does not seem to matter whether the engine is warmed-up or not.

The dealer replaced the mass air flow sensor, under the "toyota certified" guarantee. The problem persists and now the service dept says they will not perform any further service.

any suggestions?

Thanks
John

Joined: May 2002
Posts: 3,286
ECelica Staff
2001 Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS
Joined: May 2002
Posts: 3,286
Mine use to do the same thing and this is what I did to stop that delayed throttle response:

1) Lucas Fuel Injector cleaner
2) (4) New Denso Iridrium Spark Plugs from www.sparkplugs.com [sparkplugs.com] and anti-seize lubricant for the plug threads
3) Tighten throttle cable
4) Clean the air canal of the mass air flow sensor.
5) Reset ECU.

Last edited by Steven; Jun 3, 2004 2:26pm.

Joined: Apr 2004
Posts: 338
Member
2000 Toyota Celica
Member
2000 Toyota Celica
Joined: Apr 2004
Posts: 338
Mine did that before I bought it and the dealer replaced the sensor and now its fine. I would go back to the dealership and bitch smack someone

Joined: May 2002
Posts: 3,286
ECelica Staff
2001 Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS
Joined: May 2002
Posts: 3,286
The spark plug part # for the Denso Iridriums is SK20R11 on www.sparkplugs.com [sparkplugs.com]

Joined: Jun 2004
Posts: 4
New Member
1986 Toyota Celica
New Member
1986 Toyota Celica
Joined: Jun 2004
Posts: 4
Steven,

is the "canal" part of the sensor, or is that just the top of the air cleaner housing? was there obvious deposits/built-up that could have effected the sensor?

Joined: May 2002
Posts: 3,286
ECelica Staff
2001 Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS
Joined: May 2002
Posts: 3,286
Here are some instructions on how to clean your mass air flow sensor: https://celicahobby.com/ubbthreads/thread.f_1862388016_0_collapsed_2__1.html

Joined: Jun 2004
Posts: 4
New Member
1986 Toyota Celica
New Member
1986 Toyota Celica
Joined: Jun 2004
Posts: 4

I'm sure this sensor will be worth taking a look at, but the dealer has already replaced it ... so unless there's a short in the plug/wire, it's probably something else. This thing doesn't just hesitate, it doesn't budge off idle when this occurs.

Is this correct? - If the engine's ecu does not get a signal indicating additional airflow (due to opening of throttle plate), then additional fuel will not be delivered ... right? hmmm, maybe that plug is worth checking.

thank you
john

Joined: Apr 2003
Posts: 2,442
Wheezy Joe
2002 Kawasaki Ninja 250
Wheezy Joe
2002 Kawasaki Ninja 250
Joined: Apr 2003
Posts: 2,442
it's the MAF sensor.

It's probably dirty, clean it and change the plugs, viola.

Happened to me, I did guides for both spineyes


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and sung with exultation
To know even one life has breathed easier
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Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Sep 2003
Posts: 705
Originally Posted by DiabloGTS
it's the MAF sensor.

It's probably dirty, clean it and change the plugs, viola.

Happened to me, I did guides for both spineyes

I second that ! thumbsup


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Mom, I Lost you on April 7th 2004, but I will remember you for ever... I'm missing you

Joined: Jun 2004
Posts: 4
New Member
1986 Toyota Celica
New Member
1986 Toyota Celica
Joined: Jun 2004
Posts: 4

I'm encouraging my friend to clean it herself, rather than putting up with crap from the dealer. I'll post the results when known.

Thanks to all.

Joined: Sep 2003
Posts: 3,070
Specialist
2000 Toyota Celica
Specialist
2000 Toyota Celica
Joined: Sep 2003
Posts: 3,070
Also, it could be a stick throttle plate, or the throttle body could be obstructed. Spray a little carb cleaner in there, and get in there as far as you can with a rag and wipe it clean.

Also, make sure that all hoses that go to the air box are secured, and make sure that there are no cracks or leaks in them. Your focus should be around the throttle body itself, and the air box. If the MAF sensor was replaced, then perhaps that's not the problem, unless your dealer didn't really replace it.


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Joined: May 2004
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New Member
2000 Toyota Celica
New Member
2000 Toyota Celica
Joined: May 2004
Posts: 3
what kind of cleaner would be good to clean you MAF?

Joined: May 2002
Posts: 3,286
ECelica Staff
2001 Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS
Joined: May 2002
Posts: 3,286
electronics cleaner or non-cholorinated (sp?) brake cleaner spray

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