Brilliant video. Thank you. My old Volvo's K-Jet is getting less mysterious the more I watch videos like this one.

Great video, am just fiddling with my Porsche 928 K-jet, some pointers here will come in very handy

Another cracking video mate! 1 injector here in the U.S. for a 4000 cs Quattro is $67! I bought the car for $750- pays to do lots of homework before spending a dime on parts. Knowledge and the right tools first.

Thanks for posting this video! Gives me a good idea of how to diagnose my Audi 5-cylinder.

Great stuff had the same problem with my 2.3E 1990 coupe couldn't get it to start, eventually took it to an auto electrician the car spent six weeks in the shop they checked every electrical and part and some mechanics, but could could not help..took it to a local mechanic friend of my father he tried everything then gave up for awhile he stored it in his garage for years.. 3 years to be exact.. one night I'm eating my dinner and hear a knock at the door to my surprise it was him..he walked three miles from his garage to deliver the news that he finally got it to run...we rushed up the next day to witness this.. it was running but quite rough the idle wasn't perfect but was running then shut of after three minutes .. it took him another six months to perfect it through his contacts finally on the 23 Dec 2014 I got my car back idle is perfect if you need to have a chat with him..holla and I'll arrange it good luck.

Very very useful video!!! I have a car here with the same problem.

Like your videos a lot. I would say it sounds like a vacuum leak. I had the very same issue when I was doing a brake job on my Coupe 2.3 NG and realised the vacuum hose to the brake servo was disconnected 😂

Great stuff

Where is the Cold Start Valve located ug… 17:58 …answered!! but if you have a bad CSV and or a thermal time switch will that stop the the fuel pump from turning on?

check for vacuum leaks, make sure fresh oring is placed between the metering unit and the airbox.

Wow, K-Jet injectors cost me £112 30 years ago lol. I found Redex is very good for cleaning injectors as you can't sonically clean them (so I was told). BTW in summer you can easily start the car without the cold start injector even connected. One part that can cause issues is the auxiliary air valve behind the intake, it adds more air when the engine is cold, they can pack up so the car won't idle when cold

Great video :)

Fantastic progress. Now that you know the fuel pressures are all good, you must be very close to having a properly running car. Assuming the timing is correct and you've got no vacuum leaks, I think you may just need to set the mixture screw. It sounds like it's just running too lean. If you run the fuel pump, and then turn the mixture screw clockwise (richer) until you hear the injectors start spraying, then just back it off a tiny bit, hopefully the car will start and run easier. If you can only turn the screw as much as you turned it in the video, something's wrong in there, perhaps dirt or threaded screw - it should be able turn more than that. You can then fine tune the mixture screw by ear for a nice smooth idle, or with a CO analyser attached.

Good job. Iv got same problem. Goodlack.

Ke fuchs on youtube explains problems with microsvitch under the throttle body.

£15 for new old stock injectors "bargain " Should've brought a spare at that price, Just really impressed with the lengths you've gone to to get the car running cant wait until the next video to hear it running as at should. The fuel looked a little "brown'y coloured" when spraying through the injectors is the fuel old or just a the way it looked on video? how longs it been in the tank?

Really like the depth you go to with the pressure testing. However, the fuel spraying out of the injectors into the plastic bottle looks filthy, or is it just the fuel spray back-washing the injector bodies?

Excellent Video! What are you referencing for these tests? Bentley or Haynes?

Hi!! I have a question. When you test the acumulator of fuel and you test the pressure. What place you put the manometer to test it? Thank you :)

Brilliant video. Mine cold start injector doesn't get "+". Where to look? Fuses are O.K. Ground is OK. Resistentance 4om between pins. Is this correct? It works when I put 12V on pins.

So an air primer?