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Sorry replying to my own damn post, my head is mush, Its taken me till almost 2am in the morning to complete it.

Your on the money. My mate suggested the exact same thing tonight. So I got stuck into it, dropped the tank. Poured all the fuel out, it was filthy. Acid washed it. Rinsed it out over and over and over. Filled back up with fuel. Took for test drive... PROBLEM SOLVED. If I had a fuel pressure...

left field idea from a mate. What if there is crud inside the full tank, namely rust. Over the 10 mins, it is clogging the outside of the pump filter sock, to the point its getting starved of fuel. When you turn it off and restart it, the crud falls away, and the process starts again?

So checked vacuum today, it was good. Tank breather line to charcoal canister felt a bit blocked, blew it out. Also changed charcoal cannister for good measure. Downstream sensor was reading 1.0V and not moving. Replaced with a spare NTK sensor, and got it reading. NO change. Checked all wiring...

So went for a drive just now, and while watching data, both sensors are losing power under medium throttle, while still in closed loop. They will be reading fine, updating readings within correct parameters, a bit more throttle, and they both drop to 0 Voltage, while still in closed loop. Back...

Thanks for the reply. Have already checked distributor shaft play, as I seen it in a thread during research. Shaft has no play. Have roughly checked over the wires, but I intend on going over them a lot more closely, including the grounds. From what I have read, a malfunctioning, non working or...

Hi there all.. Coming to you from Australia, I need help with my jeep, and the search has gone international. Have owned 3 xjs over 10 years. Theres alot of jeep hate in Australia, but I love the things. My current issue has me completely stumped, and unless your a complete jeep enthusiast...