Hi everyone....I have a puzzling problem and my mechanic recommends I speak with you

[Bigcol]

Hi,

I own a 2004 gu diesel patrol. I have a problem that no one can definitively give me guidance on. Firstly, there are 420k on the clock.....the clutch was redone at 300k. A month ago I was driving to Noosa from Brisbane. My main tank drained by the time I got to Mooloolaba and I flicked to reserve. When I got to Noosa's main drag whilst in second I lost compression and the car died but didn't stall, I couldn't get the revs above 1500 for a minute and then it came good! I had to pick up my kids at double island point.... So I persevered untroubled until I had to get off the beach. When I engaged low gear I had a repeat of the prob and had no revs to get me off the beach. I got towed off. I found that I could drive my car in 3rd 4th and 5th at 50ks or so so I nursed it home to Brisbane. I refuelled at Cooroy....I thought maybe a dirty fuel line? Whilst on the highway I found that my car went from 50 and bumbling along to intermittent spurts to100 with no prob whatsoever!! First impressions were the air sensor...replaced that$750 and it drove perfectly for a week. Then, the problem returned.....low compression/revs and intermittent spurts of normality. Computers are saying no problems detected. Diesel specialist is thinking it has something to do with the crank(and in all honesty I didn't quite understand) but isn't certain, but he did say I'm up for big money (5-10k)more than likely and to flick the car. Finally, whilst trying to get my car home it drove perfectly then started the compression problem only to have it completely stop with all the warning lights around the corner from the mechanics. Mechanic reckons that now at least maybe the computer can pick up a fault!! Anyone out there with similar experience??

Regards Anthony

Which engine are you sporting bloke??
And any mods to the engine?

I'm guessing its a 3L
I didnt think the 2004 4.2L had an Air Sensor......... but I may be wrong

the bit that puzzles me is this bit.........

My main tank drained by the time I got to Mooloolaba and I flicked to reserve.

probably dragged up a lot of crap out of the Main Tank............ and also out of the reserve tank

also, Anthony
best to pop over to the Introductions page, and introduce yourself
might get a few more thoughtful people come and answer then