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  1. Timing problem with 2.5 Petrol (ACU)

    Engine & Gearbox
    My 1997 T4 2.5 has a strange problem: I was away for two weeks of summer holidays and when I got back, she wouldn't start. The car was otherwise running fine before it was parked. My ear told me there was a electrical problem, so I replaced the plugs, rotor and distributor cap, as I felt it...
  2. Throttle sensor - intermittent fault - wire wear?

    Electrical
    Hi, Looking at VAG COM I get this fault: I've been through lots of things Cleaned the throttle body Cleaned all earth points in engine bay New distributor cap and arm Swapped the ISV for a secondhand one Replaced relay 167 Replaced the throttle sensor I'm now wondering if it's a worn wire...
  3. 2.4L ACU Turbo project - Help!

    Engine & Gearbox
    Hey team, After stumbling onto the excellent "How to Turbo your T4" thread, I figured this'd be the place to ask. I've got a mate who is throwing a turbo into his T4, but his is petrol, not diesel like the thread. Just curious as to any major differences between the AAB Diesel and the ACU, if...
  4. 2.5L Petrol ACU - Problem with idle and when driving

    Electrical
    Hello again! Caravelle from 1996, 2.5L petrol 81KW. FWD. I've encountered a new problem with my van. When it is idle running it varies quite bad in rpm. First it keeps a steady 1000 rpm and all of a sudden it drops down to around 500rpm. At this point the "idle-valve", in lack of a proper...
  5. T4 Engine change advice needed

    Engine & Gearbox
    I own a 1996 T4 Multivan with a 2.5 81KW Petrol engine (ACU) and automatic transmission. The engine has done over 250k km. Yesteday it started with heavy knocking and the mech says the crankshaft is gone. Since the engine had done a lot of mileage, I am looking at replacing the whole engine...
  6. MOT Emissions Failure

    Engine & Gearbox
    Hi Guys, my 95 Petrol 2.5 ACU, has failed the MOT on emissions. It did the same last year which turned out to be a temp sensor in the non-maf. I haven't started to get it looked at yet, any one got any suggestions? It has had a new Cat 2 years ago, could it be a faulty CAT, is it over fuelling?
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