525 efi issue
08-26-2018 | 03:19 PM
#11
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Joined: Jul 2011
Posts: 9,594
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From: Ft. Worth TX
Even thou I am getting into ECM / PCM repair more and more by the day - never ever take a KNOWN good computer and put it on a bad engine - always take the bad running engine computer and put it a known good running engine. WHy would one do this ---- because you are not putting the known GOOD ECM at risk. Hate to see owners cause their own headaches. The tip for the day and possible saving boat owners ECMs / PCM s.
08-26-2018 | 04:05 PM
#12
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Joined: Jul 2011
Posts: 9,594
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From: Ft. Worth TX
try unpluging the water pressure sensor - did your problem go away ? IF not plug that back in and see if that help but before check out the connection / connector real well. If problem still exists -- NEXT unplug your fuel pressure sensor - did problem go away ? Check connections and connector - plug back in - does problem still exists ?
08-27-2018 | 07:00 AM
#13
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Joined: Feb 2007
Posts: 86
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From: Chicago, Il
try unpluging the water pressure sensor - did your problem go away ? IF not plug that back in and see if that help but before check out the connection / connector real well. If problem still exists -- NEXT unplug your fuel pressure sensor - did problem go away ? Check connections and connector - plug back in - does problem still exists ?
09-02-2018 | 08:32 AM
#14
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From: Chicago, Il
Yes, that's my next step. After replacing batteries, the motor fired right up. It ran until about 140 degrees, shut off and never started again. I put fuel pressure gauge back on and had 40-45 psi. I think it must be a sensor that is heating up and then it shuts the motor off. It must not cool off for a long time.
09-10-2018 | 01:56 PM
#17
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Joined: Nov 2009
Posts: 4,198
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From: KY
I have heard that those sensors are on a 5 volt reference loop. A friend of mine, with an 8.1 suburban, had a similar problem that was throwing a crank sensor warning, but it turned out to be another sensor on that same 5 volt loop.
HELP!!!! Thanks
HELP!!!! Thanks
Check any one of them (water pressure or other) to see if you have a full 5V
