1995 Toyota Pickup Tacoma continues to try to start after k

LOSTWRENCH

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1995 TOYOTA PICKUP
4 CYL
4WD
MANUAL
45,000 MILES

95 Tacoma with 2.7 liter 4 cyl

When started my Tacoma up made a thrashing sound so I turned key off and pulled it out. The thrashing sound went away but it continued to turn the engine over (i.E, trying to start). Had to disconnect the battery to get the starting motor to stop.

I pulled the starter start relay (near the battery) and bench checked it with a power supply and an ohmmeter. Seemed to close the contacts OK at only about 7 volts supply, and re-opened the contacts when supply removed.

Any ideas on what to do next? Thanks

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Either its idling too high with high combustion temperature causing it to run-on/diesel or the ignition switch

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Sunday, February 14th, 2010 AT 1:12 PM

LOSTWRENCH

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Doubt if it coulld be dieseling because it was a cold startup when it happened. But maybe it could be the keyswitch, will check voltage at starter relay when key is off. Thanks

PS> It may have burned up the starter motor also, as it took me a long time to find a wrench to loosen the battery cable, and the battery was brand new -- so the starter motor turned the engine over for quite a while (that is, with the key removed).

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Monday, February 15th, 2010 AT 9:24 AM

LOSTWRENCH

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The keyswitch seemed OK, as activating and deactivation it switched the start relay coil voltage on and off. (Near the battery). (Tested with relay removed from socket).

Decided that the solenoid in the starter motor housing had to be hanging up and making the circuit directly to the battery, so replaced the starter motor/solenoid unit and it worked fine after that.

If you ever have to remove the start relay(near the battery) as I did, pay attention to the little tab that locks it in place. I didn't and pulled too hard and damaged the exterior of the relay housing, but was able to repair it with epoxy and it still works OK.

Anyway, problem solved. Thanks for your input.

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Sunday, May 30th, 2010 AT 10:57 AM