Okey, so long story short.
Car: Audi 100 5E, Engine: WE 2.2 K-jet (Swedish model 1982)
Bought the car, hard to start, idles bad and runs bad.
Had it to a technician he said the wur was bad, replaced this and adjusted the timing, now the car runs good when engine is normal temprature, no issues.
Ok, but same problem with cold engine start, takes forever to fire, and idles badly, if i give it some pedal it dies instantly, asoon the engine gets a little warmer it runs fine.
So this is what i know:
Previous owner has deleted the EGR valve.
Fuel pump is changed to a none OEM, but should be better performing
All new fuel filters.
So i went ahead and checked the cold start valve.. dead.
So i checked the voltage from the starter and temp switch, all good.
Checked the fuel line in, fuel flowing here, all good.
Checked the valve on the bench using an adapter, air tube with some cleaner fluid in it and 12v, perfect umbrella spray pattern.
So i know the cold start valve is working and opening perfectly, i know it got 12v (For the time i am using direct battery current to test)
I know the lines is delivering fuel. So why aint it spraying it out?
Seems that i dont get any pressure in the feed line, i get fuel alright when i test it by it self, but when i have it connected to the cold start valve there is no pressure what so ever, i just get drops of fuel, as i was just holdning it up side down while its open.. but a pressure test on the cold start valve itself takes next to no pressure to make it spray, so there must be absolutly no pressure what so ever being build in the fuel line.
Where can this pressure go?
There is no leaks on the fuel head, filter or tubes, no wet spots etc.
New copper rings.
I was thinking that mby the egr delete has something to do with it, but i have no idea, also the not OEM fuel pump..
But then again if the pump was bad why is the car running perfectly when warm, also it should deliver better then the oem one, and a workshop has said the pump pressure is ok.
Any idea on my little mystery?