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cruiser driving rough on petrol 4.5l
Posted: Wed Jul 08, 2009 3:26 pm
by MAD80
i have a 93 mod 80series with 4.5l pet, its had gas fitted for about ten years now and drives fine on gas, when on petrol it runs rough, stalls, blows smoke and wont rev, unless it is flawed. i think it may have blocked injectors, could it be anything else causing these probs, iv tried running injector cleaner without any real success, my next step would be to take the injectors out and get them cleaned.
Posted: Wed Jul 08, 2009 7:00 pm
by v8zuki
do injectors first as well as the idle air speed motor
its on the throttle body they gum up over time on pet/gas combos
if it doesnt fix it check/change the airflow meter
just went through this with my little brothers 80 4.5 pet/gas npw running
sweet
Posted: Thu Jul 09, 2009 8:31 am
by tas80
Same thing with my 80, Last owner always ran it on gas, removed the injectors, 4 flow tested okay after ultrasonic clean and 2 needed replacing, pretty common on dual fuel trucks
Posted: Thu Jul 09, 2009 4:01 pm
by kranky al
have you checked your fuel filter? mine started doing the same - 1 new fuel filter later it was fine
Posted: Mon Jul 13, 2009 6:33 pm
by IN24BZ
airflow meter?
Posted: Tue Jul 14, 2009 5:56 pm
by xx.45_UTE.XX
x2?