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How do I know if it's the ECU? 200 1990

As Art and the others noted, there are several things to check.

I'd start with spark: I pull off the coil wire from the distributor cap end, and tuck it in by the left hood hinge. That way I can see the end as I crank the engine over. Don't set it so it touches metal, but rather try to leave a 1/8 in. gap to the car body. Crank engine, got spark?

If no spark, plan on replacing the crank sensor. It is *possible* that wiggling wires that go behind the head may help it out and at least get you out of the road, if not also to work on Monday morning. Either way, that's a good item to replace soon even if it's not the problem today.

If there is spark, good. You still need to check the timing belt on this car, because the crank-triggered ignition can make spark even with a bad cam belt. Look in the oil cap while someone cranks the engine to see the cam turn.

Next I'd suspect the fuel pump relay. You could jumper from fuse 4 to 6 on the fuseblock to force the fuel pumps to run- if that works, but it doesn't run with that removed, then definitely replace (or resolder) the fuel pump relay. PN is 3523608 if needed. They have date codes on them, replace anyway if it's over about 6 years.

The 561 computer on these cars can be a problem. Again, jumpering the fuses can get you around the likely failure mode of the fuel computer. Look for a "REMAN" 561 or a newer 951 unit to replace yours, or keep as a spare.

Good luck!
--
Rob Bareiss, New London CT ::: Roterande Fläkt Och Drivremmar!






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New How do I know if it's the ECU? [200][1990]
posted by  LordyLordyRed240  on Sat Apr 2 11:47 CST 2005 >


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