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You guys got me wrong. What I was trying to say is after you first install and prime the fuel system the cp3 pump need a longer crank before build pressure and start the engine ... Great info! I looked over some video on how people modify their cp3 pumps and they are doing that by mounting...

Yes I did see that post. Also I took 4 metering valves apart and from what i can see there is no difference between them. Do these have different resistance in them?

Solved that problem. Cp3s needs longer craking before starting. Now I’m trying to figure it out how to manage the high fuel pressure cp3 is making.

I bought like 4 of them from a scrapyard with different serial numbers and fittings … and made by myself the plate and so on. Also I did remove the connection on the metering valve and acts the same builds too much fuel pressure.

I did remove the intermediate fuel pump … I’m thinking that the metering valve it’s not working as it should or it’s inappropriate.

I did prime again the system very well and let it crank for like 30 and it started but guess what now i get a faulty code - pressure too high. The engine starts now imediatly but the fuel pressure spikes to 1200 bars and the engine shuts down.

Hello! I need some help with my cp3 conversion... So, yesterday I finished my cp3 conversion to a vw passat 2.0, i primed the fuel system and the car started right away, built the needed pressure but after 20 seconds of running stalled and i cant figure out what just happened. I removed the fca...