Hi guys,
I have a 1991 Polo G40 (saloon shell with G40 engine conversion).
A few years back I started having major running issues; car would run for 5 miles then cut out, wouldn't start for 10-30 minutes, then would run for 10 miles and cut out again. this would continue until i finished the 50 mile journey home, the car hasn't started since.
I have tested for spark, good spark. I have checked if the fuel rail is receiving fuel, yes fuel rail receiving fuel. Pulled injector and fuel rail assembly from inlet manifold, cranked engine, and no spray at all, injectors bone dry.
Its had numerous different second hand distributors and even a brand new G40 specific distributor, still nothing (Injectors on G40 are controlled by the hall sensor correct?).
After testing for all other faults i could think of (earths, earth crimp inside wiring loom, ect.) I decided to buy a Kdata ECU for the G40 form their website, hoping the fault was with my ECU or could be diagnosed using MegaSquirt, but after installing and testing i am having the same problem and am unable to see any problems in MS (says the reading for injector pulse width is around 6ms).
The Kdata supposedly came with a G40 specific base map, however, I'm not yet sure how to tell if that is the case as most of the engine constants where incorrect when i first connected MS to the ECU.
Also with the Kdata ECU I'm yet to get a spark no matter what i do with the ignition settings.
So i have;
.Good Spark (with standard ECU, but no spark with Kdata MS)
.Good compression
.Fuel rail receiving fuel
.Injectors not firing / not receiving any voltage
so i obviously have an electrical problem somewhere.
Please could anyone suggest any possible causes for the injectors not to be firing or suggest anywhere i could find more info?
Hoping to get this problem sorted soon so i can start to tune using MS
.
Any help, advice or assistance would be immensely appreciated.