Im still building my GTIR- Still waiting for welding. Cars been on the drive for 18 months. obvisouly cant get this car to the gargage to put it on a dyno to check as it needs welding before being moved and also brakes need bleeding.
Ive fitted a second hand engine. about a year ago. I start it up every few weeks.
Ever since ive fitted it i have always had an issue with cold start.
Mods to engine
- CATBack Exhaust
- walbro pump
- 1 bar loop
- bleed valve
- charcoal canister delete
- dump valve will be deleted soon
- new water pump
- new water temp sensor
- new oil temp sensor
- new fuel filter, spark plugs, oil, alloy radiator
- HKS inlet filter
- wide band o2
Current Known annonance issue havent sorted out
- 2 pin water temps sensor not connected (fan switch?) Connector broke and cannot replace it due to location, so fans are always on
- Oil temp gauge not working - dont know why, new sensor fitted. most likely the gauge is broken but will investigate further.
- currently dont have rocker breather connected to inlet air pipe. inlet air pipe is sealed and rocker breather has a filter on it.
- ignition timing needs checking, dizzy was fitted back in similiar place to old engine but not exact
Issues with start up when cold.
1st attempt - cranks and tries to start but doesnt
2nd attempt - cranks and starts but immediately cuts out
3rd attempt - cranks, starts but cuts out after 2 seconds
4th attempt - cranks, starts but runs very lumpy and cuts out after 4 seconds
5th attempt - cranks, starts but runs very lumpy, cuts out if accelerator pedal pressed at all
6th attempt - cranks, starts but runs very lumpy, revs drop when accelerator pedal is pressed but recovers
7th attempt - cranks, starts and runs good
Once its started and runs ok you can turn it off and it will start fine every time after that.
I am really scratching my head, if any one can help please shout. I really need someone who understands what the ECU does on start up, what sensors it checks etc and what happens if a reading is incorrect. I have the ABS light on but not the engine light.