I haven't posted here for some time, sadly life has got in the way of pulsars for me to the point where I'm going to sell one of mine so it is no longer sitting outside rotting away, I now have 4 cars and that's excessive, and a baby on the way so my spare time/money isn't going to increase any time soon! , for 3 years this poor car has sat only being started occasionally and driven about a bit just to keep things moving, it was parked up partly because of this problem and I because I suspect a gearbox bearing is starting to go.
The car is almost ready to go but I just have one niggling intermittent problem that I can't solve.
Sometimes the car will start and behave absolutely fine, turn the key, fuel pump primes, fires up and is happy as ever, 55 on the ECU check.
More often than not however when I put the ignition on the radiator fans come on full whack and the fuel pump does not prime the rail, it will start up but it will be very unhappy, lumpy, struggling to idle and misfiring when revved, Check engine light will be on. When the fans are on I cannot access the ECU fault code check. the light wont even go out when the pins are bridged.
I initially thought it was an ignition problem, have replaced the plugs, leads, dizzy cap and rotor arm, the coil is good. I thought perhaps there was a fuel supply, fuel pump or relay issue with it not priming, bridging the relay contacts so the pump runs all the time changes nothing.
As I understand things the fans will run all the time if the ECU has no or a bad signal from its coolant sensor so that certainly seems to be part of the issue, but will it really make it run so badly?
I'm going to see if I can find my consult cables to check the coolant sensor but does anyone know if it might be something else? it seems very strange.
Thanks much for any thoughts