Thought I'd throw up a post following a eurika moment today, and maybe this will help someone else....
My 3B S2 had developed an annoying running issue in the last month or so that was progressively worsening, a missfire at high boost initially (juddering at 1.2 bar and not boosting any further), then making its way down to anything above 0.5 bar. To make matters worse it did not happen on my standard mapped ECU, but did on my remapped one, and neither ECU showed any fault codes.
I was convinced it was boost related, but no leaks. I then started fearing that my piston rings were shot as it started blowing some oil out of the oil cap..... but a compression test with all cylinders at 10.5 to 11.5 bar alleviated that concern, and a new oil cap sorted the oil leak.
Whilst compression testing I thought my spark plug gaps looked wide, so I revisited them today with feeler gauges in hand and found they all had gaps above 0.7mm, one having a gap larger than 0.85! I reset all the gaps to 0.55mm and hey presto she's running better than ever!
Lessen learnt..... never overlook the supposedly simpler stuff! Unbelievable difference that it's made, both to the performance and my mood!
My 3B S2 had developed an annoying running issue in the last month or so that was progressively worsening, a missfire at high boost initially (juddering at 1.2 bar and not boosting any further), then making its way down to anything above 0.5 bar. To make matters worse it did not happen on my standard mapped ECU, but did on my remapped one, and neither ECU showed any fault codes.
I was convinced it was boost related, but no leaks. I then started fearing that my piston rings were shot as it started blowing some oil out of the oil cap..... but a compression test with all cylinders at 10.5 to 11.5 bar alleviated that concern, and a new oil cap sorted the oil leak.
Whilst compression testing I thought my spark plug gaps looked wide, so I revisited them today with feeler gauges in hand and found they all had gaps above 0.7mm, one having a gap larger than 0.85! I reset all the gaps to 0.55mm and hey presto she's running better than ever!
Lessen learnt..... never overlook the supposedly simpler stuff! Unbelievable difference that it's made, both to the performance and my mood!
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