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View Full Version : 07 A4 2.0 fuel rail/system pressure too low. Baffeled



Tenedorr
06-24-2014, 07:04 PM
So after checking the cam and cam follower we replaced both of the relay/regulator things on the fuel lines in the engine compartment (don't remember what they were called) then we replaced the fuel filter and checked the gas coming out of it. It was pretty murky looking but no water in it. Took it for a ride and it was still doing the same thing but not as much. It was also on 1/4 tank. I filled it up and the check engine light was on but not the EPC and it seemed to be running fine. Then I shut it off to pick up stuff at the store, went back out and started it up and the EPC came on and it was running like shit again. Took it to work, EPC and shitty running. Left work, check engine, no EPC and running fine. It seems to be something thats working then not working at random. So with only CEL runs fine, with EPC runs crappy. Whichever one I get seems pretty random. Any ideas.....????

Tenedorr
06-25-2014, 07:19 PM
So all day today on three different start/drives it's just been the CEL and the cars gone fine. I'm betting the filter on the pump on the tank is filthy and unable to provide enough gas to the hpfp under load causing the car to go into limp mode. I find out tomorrow at the dealership. Fingers crossed they will just pull it and clean it and thats the only problem.