Gu patrol petrol 4500
Submitted: Thursday, Mar 07, 2019 at 17:42
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Member - Philip L4
Would putting new factor fuel pump and o2 sensor help improve fuel economy We are planning a trip to
Cape York about 10,000 klm next year would keep old one for spares any ideas would be appreciated
Reply By: RMD - Thursday, Mar 07, 2019 at 20:53
Thursday, Mar 07, 2019 at 20:53
I agree with nickb, only if faulty or o2 is out of spec. You would need a tech device to read it’s small voltage output to the ecu to
check. I remember you had trouble and suggested a valve clearance
check because that makes the intake and exhaust gasses in synch with each other and will have a beneficial effect if all correct. Ensuring the ignition timing is set to the fuel to be used is also good. A new fuel pump is a sound thing to carry as a spare but if the original is working properly then it has not bearing on consumption.
The fuel injectors may be spraying squirts moreso than a fine spray. Possibly a dose of injector cleaner may assist in restoring their performance.
I replaced the head on one a year ago, but can’t remember what the front pulley is like. If the front pulley on this can move it’s outer rim and timing has been done to that instead of the actual piston position, then it may be running retarded although a normal timing
check says it is correct. You need an informed mechanic to make sure all is
well there.
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