1992 Toyota Celica Alternator problem?

POZOBYT

MEMBER
1992 TOYOTA CELICA

1992 Toyota Celica

Okay, After driving my car for a about an hour or so, when I go to stop at a red light or something, the rpms drop really low, and then the car dies. And the battery will be dead. It only does this when the car warms up. I started it and disconnected the battery, to see if it was the alternator, and the car still ran.

If I put the car in neutral and rev the engine up while I'm stopped at a red light, I can keep it from dying.

Is this an alternator problem or something else?

3 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

Thank you for the donation,

Firstly NEVER disconnect the battery with the engine running as when you re connect you can create a voltage spike that can easily damage the ECU, ii would have the alternator charge rate checked, do a scan to check for any unresolved fault codes, check the induction system for any vacuum leaks, check the air flow meter is not sticky, check that the induction hose from the air box to the throttle body is not cracked or split and its tight.

Mark (mhpautos)

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Sunday, December 27th, 2009 AT 11:50 PM

POZOBYT

MEMBER
37 POSTS

Oh alright, That's just what someone told me to do to check the alternator, I didn't know it would create a voltage spike.

Wheres the air flow meter?

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Sunday, December 27th, 2009 AT 11:59 PM

RASMATAZ

MECHANIC
75,992 POSTS

Check the battery voltage before you start the car record it now start it up and record the running voltage-If the alternator is putting the correct output you should be getting a reading between 13.5 to 15.5 volts with the headlight/heater On. If not get it checked out-

Or you can insert a screwdriver thru the hole in the back of the alty and if the voltages increase the regulator is defective. This is what you called full fielding

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Sunday, December 27th, 2009 AT 11:59 PM