r68tomlin

I have not. I'm going to look into a part number for that relay today. Hoping it won't break the bank like my two HPFPs!

r68tomlin

Promet - in searching - I don't see how this relay could help. Here's what ECS Tuning website says about this relay and the issues it cause if it is bad:

Fan Relay "219"

A failed 219 relay can leave your fan running and cause a dead battery
5.0 star rating1 ReviewMfg Part #443951253AA 443 951 253 AAECS Part #ES#360041Brand


I have no issues with the fan running, my engine simply runs very rough and sputters. Am I looking up the wrong part number by chance?

promet

That is true, but this relay is also instrumental in voltage to the charger coils ( also failing wiring in the coilpack harness is implicated ). Have a look at this thread for a better idea of why i suggest this:

https://www.audizine.com/forum/showt...CM-power-relay

SMac770

The J271 ECM power relay and the J757 engine component power relay, both in the ECM box, could develop an issue and require replacement. Originally "643" relays, now "645" relays (p/n 4H0951253A), is a simple part: https://www.europaparts.com/relay-4h0951253a.html

r68's problem description is engine poor, replace HPFP, engine good again, engine poor again, replace HPFP, engine good again, engine poor again. But was there ever any fuel pressure DTCs? The HPFP is a simple device, two wires to the ECM for triggering the timing solenoid, and the mechanical pumping by the exhaust cam. So what could be burning the pump out? Could the problem instead be the fuel pressure sensor? Could it be the injectors? Could it be the in-tank pump? What's going on with the pump duty cycle in the measuring values? Or the long term idle and mix fuel trims? Is the sputter on cold start, warm start, only after some time that its warmed up and been running? It's like P0299. What triggers it? 6 seconds of more than 2 psi difference between boost actual and boost specified. What causes that? "something between the front bumper and the rear bumper is not working well", is all the direction the P code alone gives you directly.

r68tomlin

Update: My guess is that the HPFP was never out. Because the two new ones I purchased worked fine, if even for just a few weeks, but the engine sputter came back each time with both pumps. I am working through everyone's suggestions and today, 10/5/23, purchased the coil packs and spark plugs, installed them a bit ago, and the sputtering and idle problem is STILL there! Promet has suggested purchasing/replacing the 219 fan relay. So I will try that next I guess. *** this car!!

If my Audi was an actual person I would train in MMA for 6 months, and then go and beat the hell out of it!

Airbag

buy vcds and see what car is telling you , you could have bought it with the money you have spent on parts that didnt fix it by now.

SMac770

"the 219 fan relay", no such thing in a B8. He was referring to a B6, with an EA113 5v MPI 1.8T engine. There's nothing to relate blindly between it and the B8 platform and EA888 FSI 2.0T engine. If you think it's a relay, it'll be one of the two 643/645 relays in the ECM box I already discussed in response to that conversation.

r68tomlin

Thank you Mac770 - I will check those out and look for your previous response in the other convo.

r68tomlin

My actions to date to solve this issue:

purchased and installed 2 High Pressure Fuel Pumps within 2 months of each other. They both worked if even for just a bit so it’s not the HPFP

purchased plugs and coil packs and installed. Issue remains

Replaced the Relay mentioned above, the 645 relay and the issue remains.

Next I will try and locate if there is a vacuum leak.

then possibly the fuel injectors.

while looking for vacuum leak I see this hose or line with some type of filter on the end and one end is connected the the end with the filter is just sitting on the engine. #06H133583B. Could this be the issue? Would anyone have any insight? Thanks

SMac770

That's just a vent line for the electrical solenoid that controls passing vacuum to the intake manifold flaps actuator. If you don't have codes for the intake manifold flaps, that system would seem to be operating fine. That vacuum is generated by the vacuum pump, same vacuum used by the brake booster and the EVAP leak detect pump. It's not related to the intake manifold vacuum, which is used only to pull charcoal vapors when the N80 purge valve is opened/activated, and to pull crankcase vapors through the oil separators.