Today I ordered from VW TPS : - Quantum 5w 40 FS Oil & Filter - Oil Dipstick Tube - Fuel Filter - Pollen Filter - Brake Booster Pipe (Vacuum) (Pictured Below) - Interior Alarm Sensor Switch Have also ordered NGK Iridium plugs from Awesome GTI
As for the plugs, I bought [these NGK plugs]
NGK spark plugs are fine.
Been running NGKs in Sportsters forever with no issues. Good plug.
i run BKR7E at stock gap on stage 2 30psi. no problems at all even in 100 degree heat.
I would strongly recommend using NGK PZFR5J-11 spark plugs. These NGK Laser Platinum plugs are the best option for your 2.5l. Not only are they pre-gapped and ready for installation, but they'll perform great and provide dependable service for several years.
I've only ever used NGK plugs in my girlfriends old 2.5 and my current 2.5 (both cars have a total of 150k miles between them) and have never had a problem. They have also never needed to be gapped. Just take em out of the box and install them.
Just thought I'd come back and post what I found to possibly help others. New coil packs solved the issue. All of them were in pretty rough shape when I took them out. Picked up new packs from the stealer for $60 a piece. Also bought the NGK BKR7E's, Gapped to .28 best I could. Fuel economy has returned thankfully, and low end performance is great. The turbo seems to be building boost a little more easier, and it takes less throttle to get the car accelerating. Can floor it from 2500 rpm to the limiter at 6900 without any hesitation, hiccups or blips in power.
Just swapped out some pretty old looking OEM bosch plugs that were gapped at .045 for some reason. Put in PFR6Q at .032\". Didnt notice much of a change.
I changed them over to the NGK bkr7eix #2667 and was wondering if spark plugs would have any effect on boost? It seems like the car isn't boosting as it should, I have a boost gauge and it also seems the PSI is a couple LBs lower than before the spark plug change. I have not experienced any misfires (that I can tell) and no CEL it's just the boost doesn't seem as high.
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