Truck will crank and run for a few minutes,then it'll blow the ecmb fuse and cut-off.It is a 4.3l engine.
The fuel pump circuit was a common cause for this . Any place between the pump and fuse can have a bare spot in the insulation intermittently bumping into metal . I believe the injectors may run on the same circuit so check their wiring also .
SOURCE: blows fuses
Generally speaking, a fuse 'blows' because too much current is drawn through that circuit. In this case I suspect a 'short-to-ground' or a bad voltage regulator (inside the alternator in a GMC). First, I would check the alternator's output voltage. Easiest just to look at your guage. Up to 14 1/2 volts is normal on a GM (with truck running), if it's higher - you need a new alternator. If it's under 14 1/2 volts, you
MUST find the short. Unless you have the specialized tools, (short-circuit finder, voltmeter, wiring
diagrams, etc.) this should be left to a competent automotive electrical shop. It could be as simple as a wire's insulation worn off or a short 'inside' the ECM (you truck's engine control computer). No matter what, one trip to a competent mechanic will probably be cheaper than continually replacing the computer and/or towing bills. Good luck!
SOURCE: idles to fast
When I crank my truck it runs wide open for a minute of so and then it starts to idle down. What causes this? It is a 1992 Chevy S10 v6 pickup. How can I fix this problem? I have no manuel on this vehicle for a diagram of the engine at all.
Thank you. Dave
SOURCE: 94 chevy s10 blowing fuse
Chances are, you have a short somewhere in the wiring that is causing too much amperage to pass through the fuse causing it to blow. Use a decent voltmeter that will show opens and shorts to test continuity with the wires that run to the ignition.
SOURCE: 93 s-10 blazer keeps blowing ECMB fuse which also
The ECM tells the fuel pump to come on. You can get a circuit breaker from most parts stores, and many stores you can get a repair manual for $20 that will have a schematic in it.
SOURCE: air conditioner problem with 2005 chevy 1500 silverado
I have the same problem exactly, if i turn off the ignition and then turn it back on it begins blowing cold air again. I would like to know what the problen is as it sounds like it is not unique to just my vehicle.
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The oil pressure switch has wiring that can get against the exhaust and short out . The switch helps if the fuel pump relay goes bad in that it allows power to the pump . Check that wiring too and any harness near the exhaust manifolds .
I was thinking the oil pressure switch could be going bad.I'm going to check the wiring for bare spots like you told me to.The oil pressure gauge works on the dash,but sometimes it'll read a little low until the engine warms up.It is ok after that.
The fuel pumps have caused this to happen also but always eliminate the easier things to access . Scoping the fuel pump and fuel pressure and volume tests eliminate the pump .
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