Wont Start....HELP PLEASE!

[analogue_rogue]

It cant be the maf sensor. It cant be the fuel pump rrlay. Its spark related. The crank sensor could cause it or you could have popped the hall sensor again. 

Fault diagnosis is a logical process not just a case of throwing a random load of cheap parts at te car umtil you hope its fixed. Start with what you do and dont know mate.


Ill give you my number via pm and i can help over te hone if you like?

[analogue_rogue]

Its easier than trying to type on my phone here hahha :-)

[dixie180]

And as "ALL Mk3 Golf Gti owners" will know,Relays and Sensors are a common fault issue.

[analogue_rogue]

I dont doubt that, but i have been a mechanic a long time and owning and repairing are worlds apart.

Te problem is a signal issue it is not fuel or air related. So there is no point touching any fueling relays or intake sensors. Thats like changing airbags to fix dents!!!

The crank sensor is a viable suspect. Well worth checking for a pulse put of it when cranking. If you dont have an oscilloscope (which im sure you dont lol) solder an led onto teo bits of wire, earth the negative side of led and place positive leg into output pin of sensor (it will need to be connected to the loom) and check to see if you are getting a pulse from it....

If you have an oscilloscope probe the same pin for a square wave form.

[xionsolaris]

This cant be a relay issue as he is getting fuel into a cup or a ecu fuse which would result in no spark no fuel nothing i belive in anoluge rouge in terms with the crank sensor ive had a few cam sensors in my time not related to this car which have cut the engine out when it begins to warm up and will keep the engine from starting up as a signal can be lost or be misleading to the ecu as these mk3 golfs arent so futaristic we would be looking at ecu picking up a crank signal coil charges and then dishcgares when the dizzy contact breaker point is met the ecu can advance and retard the ignition timing if there is no pulse from the crank the coil cant be told when to charge eg the no spark scenerio you have tested that the coil can hold  and discharge the spark but its worth testing cranksensor then the  then checking the dizzy timing after that theres not much more to check after that in the ignition.department as it is not that highly controlled like modern cars it runs fine when cold so dizzy timing wouldnt be a prob as misfiring would be a result or it would never start .

[dixie180]

Analogue,i don't doubt that you have been a mechanic for a long time,but being a mechanic and being and VW specialised mechanic are two different things.You did ask Dave earlier what he meant by "ECU relay" and anyone who has worked on or owned a Mk3 Golf knows what that relay is and what it does.I am trying to help that guy from spending money on things he doesnt need ie DISTRIBUTOR,which he has already been advised on here to buy.Relays are cheap fixes and more often than not are the root cause of numerous problems.Next is Sensors,again which are the root cause of numerous problems.After that is the time to look at more expensive fixes.
Xionsolaris,you say it can't be a relay problem but on my Mk3 Golf 8v Gti my relay started packing in when it got warm and the contacts inside the relay start to seperate.Mine started ok and i had spark and fuel flowing but after the car had warmed up and the relays start to warm aswell then the problem started.I also had the Crank Sensor changed as the car would cut out randomly and would not re-start for a while.
I would not advise someone to change expensive parts on their car before trying the above Relays and Sensors as they are 9 times out of 10 the problem.There are VERY COMMON problems with the Mk3 Golf and cutting out/non starting and not many are to do with the DISTRIBUTOR they are to do with RELAYS and SENSORS.

[xionsolaris]

Analogue,i don't doubt that you have been a mechanic for a long time,but being a mechanic and being and VW specialised mechanic are two different things.You did ask Dave earlier what he meant by "ECU relay" and anyone who has worked on or owned a Mk3 Golf knows what that relay is and what it does.I am trying to help that guy from spending money on things he doesnt need ie DISTRIBUTOR,which he has already been advised on here to buy.Relays are cheap fixes and more often than not are the root cause of numerous problems.Next is Sensors,again which are the root cause of numerous problems.After that is the time to look at more expensive fixes.
Xionsolaris,you say it can't be a relay problem but on my Mk3 Golf 8v Gti my relay started packing in when it got warm and the contacts inside the relay start to seperate.Mine started ok and i had spark and fuel flowing but after the car had warmed up and the relays start to warm aswell then the problem started.I also had the Crank Sensor changed as the car would cut out randomly and would not re-start for a while.
I would not advise someone to change expensive parts on their car before trying the above Relays and Sensors as they are 9 times out of 10 the problem.There are VERY COMMON problems with the Mk3 Golf and cutting out/non starting and not many are to do with the DISTRIBUTOR they are to do with RELAYS and SENSORS.

Why hasn't he got a relay yet there like £3-5 or something like that I stopped reading this thread for a while but near the start he was talking about getting a relay if you haven't bought a relay simple thing to do to test if its the relay look into your owners manual and fine fuses and relay find another relay that's not important but the same and swap it with the fuel pump relay and test if it works then purchase a relay (just look at the relay part number and match it with the fuel pump relay) You usually start with basics fuses and relays I thought we was past that now 

[dixie180]

Exactly xionsolaris,WHY he didn't buy the relays and try them is beyond me too.Instead he bought a new DISTRIBUTOR which has made NO difference whatsoever.

[analogue_rogue]

Analogue,i don't doubt that you have been a mechanic for a long time,but being a mechanic and being and VW specialised mechanic are two different things.You did ask Dave earlier what he meant by "ECU relay" and anyone who has worked on or owned a Mk3 Golf knows what that relay is and what it does.I am trying to help that guy from spending money on things he doesnt need ie DISTRIBUTOR,which he has already been advised on here to buy.Relays are cheap fixes and more often than not are the root cause of numerous problems.Next is Sensors,again which are the root cause of numerous problems.After that is the time to look at more expensive fixes.
Xionsolaris,you say it can't be a relay problem but on my Mk3 Golf 8v Gti my relay started packing in when it got warm and the contacts inside the relay start to seperate.Mine started ok and i had spark and fuel flowing but after the car had warmed up and the relays start to warm aswell then the problem started.I also had the Crank Sensor changed as the car would cut out randomly and would not re-start for a while.
I would not advise someone to change expensive parts on their car before trying the above Relays and Sensors as they are 9 times out of 10 the problem.There are VERY COMMON problems with the Mk3 Golf and cutting out/non starting and not many are to do with the DISTRIBUTOR they are to do with RELAYS and SENSORS.

You a vw sepcialist?  Didnt think so.


Please explain how the fuel relay stops a
Spark.   



Please explain how the ignition system derives its spark from the maf sensor?


Dont start quoting remedies you have been told and offering crap advice.

I never told him to buy a distributor i said suspect it. I offered a free one to test theory.  You just told him to go and buy parts that were never going to fix it so whilst i dont doubt you have owned a vw or two. You still remain an owner not mechanic or a specialist.

Either get a wiring diagram and look at it logically or shut up.
And stop offering red herrings. Like fuel pump relays and other unrelated items.

[analogue_rogue]

fuel pump relay 167 seems to be clicking fine etc, But im getting fuel to come out on turnover so its not that, its definately electrical.

Ive been reading thousands of forums and the usual suspects that are turning up as far as im aware are:

Lets start with the ignition circuit again shall we?