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Solved ✔ Mercedes Viano W639 crank no start
01-02-2024, 07:00 AM,
(This post was last modified: 04-02-2024, 11:42 AM by Clusters.)
Post: #1
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Mercedes Viano W639 crank no start
Hello mates! The van above drivi g me crazy. I tried almost everything and it still not start. The problem is that not fuel pressure in the rail. High pressure pump not making pressure.In tank low pressure pump is working well. I change two high pressure pumps, Y94 valve(quantity control valve), pressure sensor, Y74 valve. All 4 injectors tested on the bench and they are fine. Also virgin ECU and adapt with Star. Still no pressure to rail. There is pressure to HPP, but when cranking fuel pressure that outcome from HPP is too small. Fuel filter is bypassed for test. Any suggestions please!
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Mercedes Viano W639 crank no start - by passador83 - 01-02-2024, 07:00 AM
RE: Mercedes Viano W639 crank no start - by josef1708 - 01-02-2024, 07:35 AM
RE: Mercedes Viano W639 crank no start - by passador83 - 01-02-2024, 08:42 AM
RE: Mercedes Viano W639 crank no start - by passador83 - 04-02-2024, 04:56 AM
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