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Old 06-08-2011, 02:10 AM
fee fee is offline
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wb 97 Festiva cranks but wont fire

Hi guys its Fee here in Australia. I have a 97 WB Festiva 1.5, 5 speed manual. Was running ok and stopped on a cold night. I have replaced fuel pump, air flow meter, plugs and leads rotor button, distributor cap, crank angle sensor, and the ecm tested and ok. All the earths have been cleaned. Ignition switch cleaned and ok. Timing ok. Fuel pressure within spec, fuel pressure reg replaced was faulty. cca test on battery ok. All back probing tests on both crank all within spec. Traced problem down to no spark in crank mode. The moment key is released to run mode engine will fire, but will not run. Also had the distributor rebuilt march 08.
Finally got car running but only intermittently and not on cold mornings. If there are any further suggestions please let me know!

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Old 06-10-2011, 08:58 AM
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Does this auto have a cam or crank sensor? Symptoms are identical to one of these failing. If so you could sometimes pull them clean of excess grease and such re install them with results sometimes.
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Old 06-10-2011, 07:17 PM
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Quote:
Originally Posted by fee
Hi guys its Fee here in Australia. I have a 97 WB Festiva 1.5, 5 speed manual. Was running ok and stopped on a cold night. I have replaced fuel pump, air flow meter, plugs and leads rotor button, distributor cap, crank angle sensor, and the ecm tested and ok. All the earths have been cleaned. Ignition switch cleaned and ok. Timing ok. Fuel pressure within spec, fuel pressure reg replaced was faulty. cca test on battery ok. All back probing tests on both crank all within spec. Traced problem down to no spark in crank mode. The moment key is released to run mode engine will fire, but will not run. Also had the distributor rebuilt march 08.
Finally got car running but only intermittently and not on cold mornings. If there are any further suggestions please let me know!
It can only be one of 4 things, a faulty ignition switch, a faulty ignition module , a faulty PCM or a wiring problem.
I would get a wiring diagram and see how the ignition is setup (configured) to get its voltage while cranking. Obviously the ignition module has a bypass circuit to start the engine on a fixed timing value, the voltage signal has to come from somewhere to signal the module. I havent even seen a fiesta in quite a while, I do remember they seem to have lots of ignition module problems.I would start there and see if it is getting power to the proper pins while cranking. Be sure of what you are probing with the DVOM as you can hurt some sensitive electronics if you arent careful.Not sure if the ignition bypass is from the ignition switch, or if it is a PCM function.
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