I took my battery out on Sunday so I could install my boost gauge and ever since I put it all back together I've had some serious issues.
Symptoms are thus:
Car is not boosting much at all (I'm on stock map right now for safety, but it wasn't much better with my normal remap on) - gauge is indicating 0.3bar peak (which is a whopping 4.35 PSI only )
When under power, it "jumps" a bit from the 2500RPM-4000RPM range by 100-200RPM - as an example, if I'm on the motorway in 6th at 80mph, revs are at around 3000RPM... and then it'll jump to 3100RPM, car will shudder, and then it'll be back down to 3000RPM - originally I thought turbo boost pressure was dropping when this occurred but it doesn't, boost drops very slightly and then back to 0.3bar (4.35 PSI)
Doesn't occur when I'm accelerating hard (which isn't very hard now thanks to the terrible boost I'm getting)
Happens in all gears, every now and then, between 2500RPM and 4000RPM... beyond 4000RPM doesn't occur, under 2500RPM doesn't occur, and it occurs only intermittently...
Scariest part: Before I took my remap off, I was on the motorway at 80 noticing that this was happening. I put the cruise control on to make sure it wasn't driver-induced for whatever reason. It happens a couple of times and then suddenly engine loses all power, I get no acceleration or anything, my EPC light comes on and my ESP turns itself off. I'm able to coast to the shoulder and try putting on some power - nothing. I put the car in P, turn engine off, and restart. EPC light comes on, and car behaves as normal (albeit with this weird shuddering/jumping/noboost thing going on). I turned around and went home and put my OEM map back on. EPC light is off now, but problem still occurs. It's been doing this for four days now. It was absolutely fine before I disconnected the battery and connected the gauge's vacuum pipe to the Forge vacuum tap (I have the forge DV).
I checked under the cover for any torn or disconnected hoses in case it was just a boost leak... nothing. Everything tied down securely. So I'm kind of stumped, I'm not sure what to do now... VW had a look at it briefly yesterday and diagnosed an "electrical fault" but were unable to rectify and unable to install a new OEM map on the car... it's going back in on Thursday so they can try again.
Anyone got any ideas? Anyone encountered something similar on battery removal? :iono: help!
Symptoms are thus:
Car is not boosting much at all (I'm on stock map right now for safety, but it wasn't much better with my normal remap on) - gauge is indicating 0.3bar peak (which is a whopping 4.35 PSI only )
When under power, it "jumps" a bit from the 2500RPM-4000RPM range by 100-200RPM - as an example, if I'm on the motorway in 6th at 80mph, revs are at around 3000RPM... and then it'll jump to 3100RPM, car will shudder, and then it'll be back down to 3000RPM - originally I thought turbo boost pressure was dropping when this occurred but it doesn't, boost drops very slightly and then back to 0.3bar (4.35 PSI)
Doesn't occur when I'm accelerating hard (which isn't very hard now thanks to the terrible boost I'm getting)
Happens in all gears, every now and then, between 2500RPM and 4000RPM... beyond 4000RPM doesn't occur, under 2500RPM doesn't occur, and it occurs only intermittently...
Scariest part: Before I took my remap off, I was on the motorway at 80 noticing that this was happening. I put the cruise control on to make sure it wasn't driver-induced for whatever reason. It happens a couple of times and then suddenly engine loses all power, I get no acceleration or anything, my EPC light comes on and my ESP turns itself off. I'm able to coast to the shoulder and try putting on some power - nothing. I put the car in P, turn engine off, and restart. EPC light comes on, and car behaves as normal (albeit with this weird shuddering/jumping/noboost thing going on). I turned around and went home and put my OEM map back on. EPC light is off now, but problem still occurs. It's been doing this for four days now. It was absolutely fine before I disconnected the battery and connected the gauge's vacuum pipe to the Forge vacuum tap (I have the forge DV).
I checked under the cover for any torn or disconnected hoses in case it was just a boost leak... nothing. Everything tied down securely. So I'm kind of stumped, I'm not sure what to do now... VW had a look at it briefly yesterday and diagnosed an "electrical fault" but were unable to rectify and unable to install a new OEM map on the car... it's going back in on Thursday so they can try again.
Anyone got any ideas? Anyone encountered something similar on battery removal? :iono: help!