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OP: Check out my post reply here

Hi OP How many KM? My VYII S v6 (at 415,000km) is doing exactly the same thing as yours. It is really noticeable, as I have a free-flowing exhaust on it. I should make a video. Car has been fastidiously cared for all of its life. I have done all I can do to it for both spark and fuel, and...

My 3rd Delphi DFI in 2 years **** itself today. Had been driving the car around a lot for the previous few hours and was waiting outside the shops with the aircon running, and felt a drop in revs, felt like it was going to stall but didn't. From there the idle went to ****, very lumpy and...

OOOOOOOOOOOOOOOKkkkkkkkkkkkkkkkkkk.... Last night swapped out brand new NGK BPR6-EFS15 plugs (same as what was in there, only brand-new...) and also brand-new original GMH metal heat shielded leads (had the MAX300 set in there, which were new last service, less than 6 months) and it seems to...

At idle mine has a miss, I rev it a bit and it will hesitate and stutter, aircon on and it has very low power and the hesitation/stutter is more prevalent. Plant the foot hard and it will backfire.

Auto

Ok, so as my fuel pressure was reading a little low at ~35psi (not the new fuel sender units fault, as we blocked the return line with a clamp and the pressure shot up to 100psi), so i just picked up and installed a Genuine BOSCH 3.5bar (50Psi) fuel pressure regulator. Unfortunately, this has...

Fuel sender unit is brand new, filter (Ryco) new also. New fuel regulator. Mech clamped off the fuel return line to pressureise system, went up to 100psi just fine, so nothing wrong with the pump. It idles much better with more than 50psi of fuel pressure... How can pump voltage be checked?

Yep, I think so... I'm looking at a tuned ECU from Ebay, and will be picking up a coolant sensor this afternoon and changing it over Easter as it is due for an oil change now anyway. Have read that could be a cause of issues; I think **** it, I have done just about everything else! $20- from...

I have a 2003 VY which is doing something very similar... lack of power and when I put the foot down a bit more than usual (not even 50%) it will start to break down, like the timing is being retarded... myself and several mechs cant figure it out. Have done everything we can think of so far...

Hi mate, how'd you go with the valley gaskets, can you recommend a decent mechanic in Perth I can take my 03 VYII to? Dont think the current mechanic has a clue. Cheers.