Question about 1999 Ford Escort

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Car cranks but won't start. Has no spark. It does get fuel in, just changed the ecm, the crankshaft position sensor and the coil pack. Any ideas?

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Could be a crankshaft position sensor fault or even a ignition coil fault. I suggest u check the stored fault codes in the PCM first. If there is no ckp sensor codes in the system and a new coil doesn't fix the problem it's possible the coil has spiked the PCM . If this is the case a new coil and PCM should be installed. The engine rpm and signal from the coil is picked up from the ckp sensor.

Posted on Sep 29, 2010

  • benmuscleand Sep 29, 2010

    if u have had the PCM changed it's possible that the reason why u have fuel and no spark is because the PCM isn't coded to the existing modules. And yes the vehicle will crank had a similar fault on a puma.u need to check if the PCM is blank .u need to plug it in to wds or ids fords diagnostic tool. Check for a rpm signal via datalogger to c if the PCM is seing a ckp signal/ rpm

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If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

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Hi Delberta, The links below are short youtube videos showing how to fix a car that cranks but doesn't start, In the 1st video this guy tests if it's fuel or electrical.......................................................
Fixing Car That Cranks But Doesn Start Up Fixing Car That Cranks But Doesn Start Up
I don't know if you have a cranksharft OR camsharft position sensor so here's both... I hope this helps...CHEERS.........................
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check inside the distributer that the little magnet is still in place on the rotor and that the sensor is outputing pulses as it turns over
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It sounds like this could be a common problem - usually this is caused by the crank sensor going out/bad. The sensor is mounted to the timing cover on the front of the engine.
The crankshaft sensor provides both engine speed and crankshaft position signals to the ECM. The sensor is a variable reluctance device, consisting of a bobbin coil with a magnetic core. The resistance of the coil is approximately 1.35 kilo ohms . The steel teeth on the crankshaft timing ring are used as a rotor. As the rotor teeth pass by the crankshaft sensor, pulses are generated.

The rotor has 60 tooth positions set at intervals with three teeth missing. The gaps identify the TDC position of the 6 cylinders during one complete engine cycle (two crankshaft revolutions). The rotor thus provides both engine speed and crankshaft position information to the ECM. The missing pulses identify crankshaft position. Each tooth pulse after the missing pulse represents of crankshaft rotation. Thus the frequency of the toothed pulses are a measure of engine speed.
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