1994 Toyota Camry no spark
NO spark or injector pulse. Battery voltage to coil and igniter. Have continuity from coil/dist and igniter and ecm. All grounds check OK. Do not seem to have pulse on negative side of coil when cranking. Replaced Dist, igniter and ecm with known good units. Still no spark or injector pulse. Are there any of the engine sensors, either shorted or bad that would cause this? Car is 4 cyl
If you have no "pulses" on the neg side of the coil......my guess is either a bad pickup coil or bad condenser or...bad igniter inside the Dist. I cannot think of any sensors ...other than the pickup Coil...which would prevent spark. What'd you think?
Took car to friends shop with better equipment. Have pulse from igniter to ecm but no return pulse from ecm to igniter. Tried 2 known good ecms. same results. I know knock sensor retards spark in certain cases. Don't know of any other sensor that wound interfere with spark, but must be either a bad wire or sensor causing the problem.
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