1994 Ford Probe Won't Start - Engine

Question: 1994 ford probe se 5speed, engine turning but will not start, did timing, change plugwires, plugs cap, rotor brush getting good spark, checked fuel pump good, can the computer go bad, if so can the same from a automatic work.

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Technican: You need to either get a noid light and hook it to an injector connector to see if the injectors are receiving voltage OR get a can of throttle body cleaner and spray it into the throttle body (follow safety precautions)then attempt to start engine. If engine starts briefly and stalls or attempts to start the injectors are not delivering fuel. If the engine still does nothing it's time for a compression test.

Owner: 94 ford probe wont start did timing, plugwires, dist. cap, rotor brush, check fuel pump, tried starting with throttle body cleaner, quick start.car was driving parked it then just didnt start after that.

Technican: You said the fuel pump tested good. Make sure it is operates for a couple seconds when key is first turned on and when engine is cranking. And that fuel pressure is within specifications. If you have fuel pressure and the injectors are not being pulsed check for 12V positive to the injectors (one end of voltmeter or test light to known good engine ground and other to injector connector). If 12 volts positive is missing inspect wires and fuses. The injector ground is pulsed on and off by the computer (PCM). If this is missing while cranking there is a good chance the computer is bad. You must match the part numbers when replacing the computer. Don't overlook fuses and grounds. autozone.com has vehicle repair guides that may be helpful if you don't have a repair manual. Another option is a subscription to alldata.com, it is an information system used by independent shops. Alldata offers a DIY version that covers one car. It cost about $25 for a one year subscription.

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