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1993 Ford Probe Question: continued from prev problem = thanks to pushrod , i checked all fuel injectors

 

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paige88, South San Francisco, CA, December 22, 2013, 17:42
 Rookie

with a noid light check. cyls 1,2,3 all flash with eng cranking = normal oper. at cyl 4 the problem cly , the noid lights stays on
and does not flash . checked the connector and wires to fuel
injector at cyl 4 = ok . it it ther pcm that is the cause for the incorrect injector pulse at cyl 4?

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  • Answer #1

    G. T. Service Center (3079 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG December 22, 2013, 17:53
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     Master

    IT IS STAYING GROUNDED. CHECK INJECTOR WIRING BACK TO COMPUTER FOR SHORT, BAD WIRE, PINCHED, ETC, BEFORE CONDEMING ECM. Just to add incase, the ECM/PCM supplies the ground signal to activate the injector, if the noid light is always on then the wire has a ground.

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  • Answer #2

    Greg's Orange Auto (12192 Answers) , Orange, CA - (714) 361-9386
    globalhelper December 23, 2013, 05:51
     Master

    could be driver in ecm is bad

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  • Answer #3

    pushrod December 23, 2013, 07:26
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    Let me know what you find out!

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    paige88, January 13, 2014, 20:26
     Rookie

    Hello There,
    finially fixed my car. Problem was in the eng wiring harness. found a spot in the harness that rubbed through
    on a bracket. the wire to the inj at cyl 4 was grounding there and the inj stayed open spraying fuel constantly into cyl 4 . I repaired the harness and the car ran fine till it got really warm . then the same issue . I think the wiring got damaged internally due to overheating. I replaced the whole harness . car is running perfect now. Just wanted to say thanks especially to pushrod for sending me down the right track . You guys are awsome !!!!!

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    ProfessorG, January 13, 2014, 20:31
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    Way to go Pushrod

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    paige88, January 14, 2014, 20:31
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    Professor G ,
    You did well as well .
    You were right with the damaged wiring harness .
    Thank-you to all of you

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