Stan's Epic Golf Build: 1.6se becomes 1.8T

**Jmac** · 02-10-2011, 10:44 PM

Replied with some info on the Mk4 section mate

**GOLFBALLS** · 03-10-2011, 01:13 AM

You sure its not something simple like a faulty crank angle sensor or something? If thats dodgy the engine will crank over but not fire iirc...

**Stan** · 03-10-2011, 05:27 PM

crank angle sensor is fine, vagcom shows 200+ rpm on cranking - so the sensor is working. good idea though

**GOLFBALLS** · 04-10-2011, 01:53 AM

Did you find out if the plugs are sparking?
Does the 1.8t you're using have the seperately amplified coilpacks, or the individually amped ones?
And i know i'm scraping at the barrel here but did you fit a new fuel pressure regulator. They are prone to fail...

Just making sure you havent forgotten the simple stuff as these faults often are

**Stan** · 04-10-2011, 03:09 PM

spark at plugs
separate amp for coil packs
original fuel pressure regulator
with fuel pump relay hotwired there is fuel at the plugs

Battery to relay circuit checks out as does the pump to relay circuit - that leaves ecu to relay, a dud earth or something.
All fuses ok
ecu/engine was from a pranged car, but the airbags didnt go off, so there goes my theory that the ecu was holding back the injectors and fuel pump relay.... or maybe it is, nothing to suggest this on vagcom though

on cranking only 5 volts at fuel pump and 5 volts across the injectors

Golfballs i think you are absolutely right - it's a simple thing, it just comes to tracking it down

**Stan** · 06-10-2011, 11:41 PM

Jmac has pointed out that the wiring is different on the fuel pump relay between the two ecu/cars, i think were are onto something now

**Stan** · 09-10-2011, 07:42 AM

SUCCESS !!! Got the car to run after changing a wire in the plenum chamber from the brown plug to the orange one, which involves the fuel pump relay!

Thanks guys, especially Gav who spent a lot of time on the phone with me and Jmac who discovered the actual wire (after a fair bit of time checking out circuit diagrams - he is the wiring guru, will have to get this guy to chip it later).

Also to Steve who offered me the chance to try his computer and check out his cars if need be.

What a great forum

stand by for more pics and updates...