There’s apparently a couple of potential sources, but the one I have experienced more than once is the flexible circuit board fatigues the solder joints around the inflexible components soldered to it.

Easy fix.

@Spac bang on, reflowed every joint, car runs nice now!

As a side note if you try to drive with no cluster fitted the alternator won't work. Don't ask me how I found out

Driving without the cluster also sets codes for lack of speed signal to the ECU, meaning you get fast idle and backfire on the over-run.

Also on clusters - there are some good notes on exchangability in the 700/900 FAQ.

And the old guys whine how complicated modern cars are.....

There is a significant difference between a modern car and an 80s 740 or 90s 940

    ramrod

    There is a significant difference between a modern car and an 80s 740 or 90s 940

    Pretty sure the 940 is more complicated than the new 2019 fully redesigned bajaj auto rickshaw

    We slapped five new tyres on it, bled the brakes, flushed the coolant, flushed the oil, and flushed the power steering. It's driving nice, has a low idle and keeps throwing a faulty AMM code. I cleaned the AMM but that didn't solve it so I suppose we'll need to swap it out.

    Not pictured: an ant colony we killed. RIP

    Also, I totally forgot about these sweet EQs. The stereo sounds great too - bonus!

    Cleaned out the pcv? and have you done the rear diff and checked the front suspension bushings?

    Haven't done PCV yet or diff oil. I've looked over the front bushings, the sway bar endlinks are pretty toast but everything else is okay-ish

      jamesinc

      Haven't done PCV yet or diff oil. I've looked over the front bushings, the sway bar endlinks are pretty toast but everything else is okay-ish

      Even if they look ok they are most likely rooted

      Replace the bits between the 2 arms with poly and then the others with normal rubber

      @DecimalDuck that is ATF from the power steering rack. I'll have to have a look and see if it's the rack or just a hose. That amount of leaking will stop it passing blue slip though.

      Looks like rack to me, it's leaking from the passenger side dust boot

      Oh yeah, these were the old tyres:

      Seller was like yeah they'll be fine to drive to Eastwood from Dee Why. Hahahahaha

      • Spac replied to this.
        ramrod

        That tyre is only 25% worn

        Haha yes, often you see tyres like that on wheels for sale and they say “good tread” LOL!