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Old 10-23-2009, 02:04 PM   #1 (permalink)
Sparky
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Join Date: Oct 2009
Location: Beaverton, OR
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87 MR2 has no spark

Ok, little introduction first. I'm actually from the dark side (old school BMWs, I've got a couple 2002s), and haven't played with an EFI Toyota in close to a decade (had a MkII Supra). I recently had an 87 MR2 fall into my lap. It was intended as a parts car, but the other guy never got around to parting it out, and when I was looking through it the car actually seems pretty solid; shifts smooth, good clutch and brakes, cranks easily, but it has no spark... I would love to get it running instead of parting it; I just don't think I have the heart to part an old MR2.

I've run through the list for the 87 BGB, and I'm a little stumped. I'm seeing 2-3v at the hot side of the coil with the ignition on (shouldn't that be 12v?) and the coil checks out ok. I'm getting a bad resistance read from the sender on the distributor (a steady 225 ohms resistance), so I'm assuming it's a bad sender, but not totally sure. I'm thinking the 2-3v means a bad ground somewhere, but where should I start? Also, the plugs coming for the dizzy are gray, but the connectors for the coil are green; am I checking the right thing? I'm 99% sure the gray leads are the distributor sending plugs. New dizzy time? Is it even the right dizzy, with gray plugs? All the ones I've seen online had green plugs that match the coil side ones.
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