ok then, ecu is getting a rev counter signal, and the isv should buzz. next step, check for fuel and spark!
Check for spark at the plug first. Before you unplug the feul lines. Then check at the injector pipe for fuel. Or crank it and whip a plug out to see if its wet.
no need to take lines off, just take out a plug and see if its wet, it should be by now since you've been cranking it over for ages. dont want to check for spark at a plug if the bores are wet with fuel, dangerous. start by popping off the king lead and rest it close to the engine block somewhere, then crank it. should see it sparking to the block (obviously leave plugs in) if thats ok, take out the plugs to see if the tips are fowled up, and check plugs/bores for fuel. Could just be plugs need a clean, did a hg on a polo and it wouldnt start, just needed to clean the plugs
Thanks for the info above ^^^ I went to my lock up after work today. I didn't get a chance to check for a spark but i did take one of the spark plugs out, and the bores looked dry, and also the plugs look quite black... ( 8 months old from my old engine ). I did notice this though - A loose wire which connects to the ignition amplifier. Its a red & white wire but i cant trace it to anywhere. Could it be for the fan over run maybe? .
its for the lamda probe, which you dont have. vw left it in there just in case it had a retrofit lambda package installed. p.s. that plug should be clipped into the bracket with the square slot
Thanks for pointing that out Jonny... Glad the wire is not needed. I bought a set of new plugs for it today, so will try them on the weekend. Not sure if it will make a difference, but worth a try... So what would you recommend i look at when im working on it on the weekend? i'll check for a spark, and also check all the wiring to the dizzy and coil. Anything else worth checking. Cheers for the help so far R.J. Much appreciated!!!
I think you should go back to basics here: 1. Have you got a spark at the plugs 2. Have you got fuel at the injectors (the quick way to tell is that the plugs should be wet after a while of cranking) If you've got a good spark and a decent spray, just about all that's left is compression and timing. If you're missing one or the other, then you can fault find that system till it's resolved, and try again.
Sure you've not fried the ECU with a dodgy earth somewhere? Although the bores would be full to the brim with fuel. Hmm. Would explain the slow cranking speed.
At the last report the fuel pump was still priming and stopping, so that rules out the fried ECU for now.
No worries. Incidentally, I've just skimmed through the thread again, and I can't see any point where you've tested that the lift pump is running, and you said in another post that the plugs were coming out dry. Worth a look?
Thats a good point. I just assumed as the fuel guage was working ok, the lift pump would be ok to. But thinking about it, the pump is seperate. Should of thought of that really. Will definately check it though... On sat im going to start from the lift pump and work my down the car, testing everything... Should i take the lift pump right out, or could i get someone to turn the ignition on and listen/feel it working? Really determined to get this fault found and out the way... I know its going to be something small to Will update on the weekend. Cheers
disconnect the plug from the main pump, then turn the key 1 click, you'll hear the in-tank pump prime
Will do Jonny, cheers I decided to take the day off work today, so will see if i can sort this out once and for all... Will go through everything thats been menthioned in this thread, and fingers crossed, will hopefully get it going I'll update later on and let you know how i get on. Cheers!!
Right then... Been over the lock up all afternoon checking everything. There is definately a spark coming from the king lead, so thats all ok. I decided to replace the plugs with Bosch Supers, as the NGKS had seen better days, and were coated black!! I then went on to try the pumps. Disconnected the under car pump, turned the ignition on and the intank one was definately priming... I re-connected the under pump, turned the ignition and it nothing... When i checked before, i must of been hearing the intank one thinking it was the main pump... So it looks like the main pump is completely dead. Glad ive found the fault, but ive heard these pumps are expensive!!!
I should of done that. Will try tomorrow... The loom was in great condition, so hopefully not a wiring fault. But it was completely dead, no sound coming from it at all. Is this what happens when one fails, or should it atleast make some sort of whine?
