Following in line with this thread, how would you know that your injectors needed a service? I've got 415k on the clock.. (it smokes a little, but that is more likely to do with my fuel tweeking....)

I was thinking of getting them done 'for good measure'...

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Hercules: 1986 110 Isuzu 3.9
Brutus: 1969 109 ExMil 2a FFT (loved and lost)

At the very least you will need the injector opening pressures reset after that many km.

any ideas on general ballpark cost of injector service..

If you remove and refit yourself, it should cost <$100. New (genuine isuzu/kiki/bosch) injector nozzles (if needed) were ~$50 each when I got mine done.

I had my injectors done (on both vehicles) by diesel australia at slacks ck.

I am pretty sure my last ones were $280. And that was with me removing and refitting. Wasn't a very professional job either as they left STILSON marks on the injector bodies. Wasn't very happy I can tell you

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Cheers......Brian
1986 110 4BD1 Turbo Isuzu County Dualcab
1985 110 V8 County (soon to be Isuzued)
Ex RAAF No.5 trailer ARN 232-501
Haulmark 1 ton trailer

Was that up min NQ?
Maybe you should send them down to Brisbane next time?

Something I overlooked for many services was the fuel sedimenter (mounted on the chassis in front of the rear drivers side wheel). Mine was full to the top with gunk - must have caught the dreaded "fuel bug". You need to take the bowl off completely, not just let it run out through the small drain plug. Some gunk was also found in that small mesh strainer below the lift pump that JDNSW commented about.
Cleaning these out got rid of a mild flat spot it used to have at high revs.

+1. You get a dodgy batch of fuel and it can fill up real fast.

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Hercules: 1986 110 Isuzu 3.9
Brutus: 1969 109 ExMil 2a FFT (loved and lost)