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Hi all.
Had a rough start on Friday, check engine light came on along with ECS light. Had a bunch of codes throwing. It was all of sudden too. Any ideas, I've heard fuel filter, fuel pump, fuel pump relay (not sure where this is located) or other fuses since there are no bunch of electrical problems. Thanks is advance.
Had the same issue, changed the fuel pressure sensor and the same issues you described continued. I then replaced both my hpfp that sit on top of the engine (high pressure fuel pumps) and problem fixed. My car is a 2007 with the fsi engine, the pumps cost about $500 new and pretty straight forward installation took about 1 hour max. Hope that helps!
You should make sure you don't have vacuum leaks, check all of the hoses you can. Half of those codes I had thrown when I accidentally knocked loose the big intake pipe behind the motor. SAI issues are a bear to track down, I hope there isn't actually an SAI issue.
Seems that I'll need cam follower too. At least most of the sites I've looked at for the hpfp reccomend replacing as well. Can you think of anything else I need before I start this hopefully easy project.
By the way, wanted to change my fuel filter too. How the heck do get the under body off where the filter is. A couple of the fasteners look like bolts but the others I haven't seen.
Again, thank for your help.
Well, AUDI recommends replacing the cam follower, and I did, not sure how necessary that was. As far as anything else, the new HPFP does not come with the little plug, you're supposed to swap them across. One of mine was frozen, so I had to order the plug. You might consider doing that.
Replaced hpfp on left side since it was leaking. Also new cam follower and fuel sensor. Still getting 13 codes. Checked out relay for pump, seemed fine with volt meter. I did notice something odd, the fuel pump fuse (20amp) in slot 31 wasn't there. Looked to see if someone bridged it, nothing. Car runs for about 30 seconds ECS and ESP lights both come on. Will replace right side hpfp soon (have a bunch of other bills too). Next up, will replace fuel filter in the rear and check main fuel pump too. Anything you might think is going on? Thx again.
Replaced hpfp on left side since it was leaking. Also new cam follower and fuel sensor. Still getting 13 codes. Checked out relay for pump, seemed fine with volt meter. I did notice something odd, the fuel pump fuse (20amp) in slot 31 wasn't there. Looked to see if someone bridged it, nothing. Car runs for about 30 seconds ECS and ESP lights both come on. Will replace right side hpfp soon (have a bunch of other bills too). Next up, will replace fuel filter in the rear and check main fuel pump too. Anything you might think is going on? Thx again.
anything is bad on the low pressure side if you are not getting low pressure side codes, the G410 (itself notorious for failing) monitors and will through a code and MIL.
Also, Fuse 31 in the right fuse panel is for MPI engines only - I don't have one either.
Last edited by ScottCNelson; 06-06-2019 at 07:55 AM.
05-26-2019, 09:49 PM
Fuel rail/system pressure too low
