Bought this 03 DSG about 2 months ago, car drove great with the exception of a slight stumble sometimes when at part throttle and I would see the boost gauge move from about 0 to 8 or so. Then it got worse.
It has now grown into a full problem. Under full boost (about 20lbs) I would see my fuel pressure spike up to 100 and cause everything to go crazy.
First I thought it was the FRPS because that was a code it was kicking out. After replacing one then having it happen again and realizing that the FRPS was definitely NOT blown, I started looking at other things. That’s when I replaced the FPDM with a junkyard replacement and all seemed fine. So I ordered Derek's modified FPDM and it still seemed fine. Then last night, the stumble happened again, then went away. This morning: Car didn’t want to start. Actually showed zero fuel pressure. Primed it a couple of times, then fuel pressure came up and car started.
Could it be a pump (or two) going (or gone) bad? Possibly they were getting weak and the stronger/better FPDM set up has finally caused them to crack? (updated the FPDM wiring with Derek's (Black308) harness).
I would try to get some datalogging in but now I’m afraid to move it if it decides to die on me. (Of course, full tank of gas right now, so dropping the tank won’t be much fun).
Just to let everyone know, the car supposedly has GT pumps in it (from back in 2010). We’re talking a KB 2.2 with 20lbs of boost, 60lbs injectors, BA3000 Mass Air, Bassani full exhaust, Killer Chiller, BAP.
Changing fuel filter tomo, hoping that’s it, prob should have changed it when i bought the car. If not, dropping the tank....
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It has now grown into a full problem. Under full boost (about 20lbs) I would see my fuel pressure spike up to 100 and cause everything to go crazy.
First I thought it was the FRPS because that was a code it was kicking out. After replacing one then having it happen again and realizing that the FRPS was definitely NOT blown, I started looking at other things. That’s when I replaced the FPDM with a junkyard replacement and all seemed fine. So I ordered Derek's modified FPDM and it still seemed fine. Then last night, the stumble happened again, then went away. This morning: Car didn’t want to start. Actually showed zero fuel pressure. Primed it a couple of times, then fuel pressure came up and car started.
Could it be a pump (or two) going (or gone) bad? Possibly they were getting weak and the stronger/better FPDM set up has finally caused them to crack? (updated the FPDM wiring with Derek's (Black308) harness).
I would try to get some datalogging in but now I’m afraid to move it if it decides to die on me. (Of course, full tank of gas right now, so dropping the tank won’t be much fun).
Just to let everyone know, the car supposedly has GT pumps in it (from back in 2010). We’re talking a KB 2.2 with 20lbs of boost, 60lbs injectors, BA3000 Mass Air, Bassani full exhaust, Killer Chiller, BAP.
Changing fuel filter tomo, hoping that’s it, prob should have changed it when i bought the car. If not, dropping the tank....
Sent from my iPad using Tapatalk