I Have a toyota 7 series that will not stay running. as soon as you release the key it dies.... if you hold the key in and unplug the starter coil, the truck will appear to idle just fine. I Have checked the "usual" distributor connector has 12 volts to it. the single wire oil switch (by the fuse box) has 12v to ground. I swapped as many relays, between this truck and another just like it.
Oh Yeah, This truck died right after a " tune up" plugs/wire/cap/rotor etc.... HELP!!!
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Thank you all for your answers, but alas... The customer shipped it off to another division... (it ain't there problem, no more). I appreciate the quick response as usual guys!
Run 12 v to coil.Start truck if it runs Check wire to coil.Some have 2.1 hot in start 2 hot at run.Check all connections between switch and coil for bad current flow
does it have an external resistor on the coil?
is this a truck built since 2004 (CARB?)
have you checked to make sure there is a good ground to the ignition sensor pickup in the distrib?
It does sound that way, I agree. However I did take a known good one and try it... no change. The relays energize and the dash lights up in the run position.
Sounds like a bad key switch to me and probably has nothing to do with your recent tune up.
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