With "NO" MIL on, 22 year old Bosch OEM fuel regulator installed, there was poor performance under load and upon hard acceleration. LTFT under hard acceleration went to ~13%. But, LTFT under light soft acceleration went to 4%. After replacing fuel regulator under hard acceleration LTFT 8%.
So I bought an injector machine. Flow tested the injectors found out my 440's were really 380's. Swapped out 3bar for a 4bar fpr. Runs a bit better.
The fuel(diaphragm) pressure regulator failed and caused a fuel leak into the air box. The car had a hard warm start issue which led me to inspect the regulator. After not being able to start the engine while warm, I pulled the vacuum line from the regulator to discover fuel dripping out of the rear. After installation of the new regulator and air filter I checked for leaks and drove home. Once I arrived home I popped the hood and checked for leaks and any smell of fuel. All is well!
The g60 oem fpr part # is 535 635 735 5. The same part without the VW part # made by Bosch is 0 280 160 235.
Replaced the leaky fuel pressure regulator with a new original Bosch FPR and the car runs fine again. Solved two issues, one is the rough idle and stalling.
I put in the Bosch 0280160235 and it worked fine or at least I haven't noticed any issues. Fit was perfect. The new FPR solved the idle and stalling problem
I installed new BOSCH FPR yesterday and it did not change a thing) Plus I don't have any lean or rich codes and the car misfires even at lambda 1(14.7 AFR)...
I'm a bit disappointed with China and Taiwan parts too I ordered a fuel pressure regulator from GAP said OEM Bosch which would lead me to think ..... ok German goodness:thumbdown: nope, says made in China right on the top hat of the regulator
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The brand is registered in Germany.
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