Hi, help needed guys i still cant get this car running!! its a mk3 golf 1.4 1997 AEX It starts for around 10-15 seconds at very low idle (250rpm) if you try and rev it, it just cuts out! Ive changed the following things without joy!! Brand new fuel pump Changed all four injectors Brand new throttle body and had it set up to the ecu via vag-com Changed fuel pressure regulator Changed spark plugs Changed coil Checked the spark Checked pressure on the fuel pump by taking off injector fuel pipe and cranking over Im pretty sure its a fuel starvation problem as you cant rev the engine at all without it cutting out straight away. Vag-com shows no faults either! Its been two weeks now and i just cant get this car running! Could someone please help? Cheers
fuel filter been changed? also have you checked the vac lines, I'm guessing it has a fuel pressure regulator, if so they usually have a vac line hooked up somewhere.
It broke down a month ago(run out of fuel) and we then changed the fuel filter, it ran fine for two weeks and then broke down again and now i cant get it started. Could the fuel filter have blocked up within two weeks? Yes they do have fuel pressure regulators which i have already changed and the vac hose is fine. Cheers
runnin tank on empty could have left you with lots of crud in the fuel lines perhaps, but i dont think it would have clogged it twice...
Well seen as ive placed pretty much everything else i can think of i might as well replace the filter aswel its only 5. Could it be an ecu problem?
The rev counter works but then again it does sometimes sit at 0rpm whilst the car is still running at very very low ilde
Yes the hall sender seems fine to me, the only reason i think it is a fuel problem is due to the car not reving at all and everytime i press the accelerator it cuts out, so the engine seems like its getting enough air but not fuel. Is there anything else i could check?
it does sound like a fuel problem yep, but since you say you replaced it... hang on where did you get the fuel pump? Since yours is an MPI are you sure its an MPI pump and not SPI?
Have you checked for fuel leaks? Only ask because mine wouldn't rev and i found the fuel pipe that connects to the fuel rail was perished and also the jubilee clip had worked itself loose causing fuel to p**s down the back of the block.
The fuel pump was bought brand new from euro car parts, it is the right one as i double checked even against the old one. Yes checked for fuel leaks and there are none, i can see the pipe whilst cranking it over and there is not leaks etc Cheers guys
So am i mate, ive spent two weeks on this car and still no joy!!!! Anyone else? I just know its going to be some thing really simple!!!!
May sound silly but have you got the HT leads on in the right order its just you mentioned changing the spark plugs? Also has the dizzy been moved? Did you get any crud coming out the fuel line when you checked the pressure?
No it dont sound silly mate i have checked they are the right way, i also checked the cam timing, no i have not taken the dizzy off tho, but the spark is good when i tested it. No there was no crud/muc coming out when i tested the pressure. Does the fuel filter work with any sort of back pressure to it? as in im thinking it could be blocked but the only reason it is flowing good when i took the pipe of is because it has no back pressure on it to clog up the output. Hope that makes sense?
good point about the leads, worth rememberin on the engines with the dizzy on the end of the head the rotor arm rotates anti-clockwise, it caught me out when i did the cap on my gf's polo!
Yeah i know mate that was one of the things i thought it could be so checked the lead order against the cam timing and rotor arm direction and all was fine!
Have you checked all the vacuum lines are in good condition and are all connected? Any chance of there being an air lock in the fuel rail?
I have checked all vac lines and they all are connected up correctly i assume as i have not removed them and if i have they have gone straight back on, ive checked the leaks and there are none. Im not sure about the air lock tho, put i have had the injector rail off the car, how could i check this? surley this air lock would have cleared after the amount of attempts to start the car?
