Recent content by Whitey_83

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    4.3 MPI Possible ECM issues

    Thankyou Chris. All sorted now thankfully!
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    4.3 MPI Possible ECM issues

    Hi Guys, just wanted to close out this thread. I had my ECM repaired which bought it back to life. The ECM had a fried clock chip as first thought. Thanks for your assistance anyway. Cheers Chris
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    4.3 MPI Possible ECM issues

    I have check both circuits before (both OK) but will check again. Thanks
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    4.3 MPI Possible ECM issues

    No I haven't replaced the Distributor Cap. But unsure if this is contributing as it revs up past 1200 with fuel or starter down the throttle body
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    4.3 MPI Possible ECM issues

    Sorry mate, FP still momentarily stops as does the engine for the 0.5 sec but is able to run on again....just. I just timed it and it is a consistent 20 second cycle. 20 seconds from turning on key to MPR energised, them everything blips/resets momentarily every 20 seconds after that. This...
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    4.3 MPI Possible ECM issues

    Have good power at P18 with key on. P22 doesn't ground the relay until the magic 20 seconds pass, them bam the ECM comes to life and ground's the MPR.
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    4.3 MPI Possible ECM issues

    Hi alldodge, Since cleaning the injectors the fuel pressure holds nicely. After the 20 secs the fuel pump stays on continuously with good pressure. Swapped relays and convinced both are serviceable. I have been front to back through manual 32 and 36 thoroughly.
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    4.3 MPI Possible ECM issues

    Thanks for the feedback guys. I have the Service manual 36 for the ECM and engine and have checked as much as I can without a scan tool. Not confident that a scan will pick up any codes due to the on/off state of the ECM. Have myself convinced it's the ECM after reading this...
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    4.3 MPI Possible ECM issues

    Hi Guys. I'm writing because I'm at an absolute loss with the electrical gremlin in my 2001 4.3 MPI with Alpha 1 running the 555 ECM. I purchased this boat knowing it had an issue but being pretty handy I thought it would be an easy fix. I wasn't very MCM savvy at the time.... I don't have the...
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