The fuel injection system on my missus's 1989 Passat is still playing up.
Starting from cold the revs are all over the place, up and down, the car cuts out 3 or 4 times in the first 10 minutes or so. Settles down when warmed up but hardly smooth.
It is the RP 1781cc engine with a single point Bosch FI unit. My local garage man tells me that this is one of the first EFI units fitted and they cannot attach their diagnostic equipment to this one. Anyways.. attempting a cheap fix they have swapped the FI unit for a 2nd hand part and replaced the 3 sensors (with 3d party units) - to no avail.
They say they are at a loss at what to do next other than for me to try a local EFI specialist or (God help us) a VW dealer !
On another group Martin suggested that 99% of EFI problems are sensor related and 50% of those are due to dodgy cables.
Is it worth swapping the 3 cables or is it more likely the problem lies elsewhere e.g. - ECU ??
Additional info - the crankcase breather pipe is shot and i'll replace that tomorrow but I doubt if it will improve anything and I have not done owt to the engine recently that could have caused this (e.g. stem clean).
The car is not worth a great deal and so I dont think it is worth investing big £ to fix it - better off using that dosh to put towards getting a new motor.
Any ideas gratefully received.
-- JohnB