AdsoYo

I've been chasing what I thought was cam surge for a long time now. After doing 24x and tuning this thing with every combination of variables possible over the last 3 months it's still not as smooth as I would like. Basically it's jerky when I cruise slower than 50mph and below 2000rpm. Someone said it could be a mechanical misfire. I had never heard of that so I searched it and it sounds like they are valve train or fuel injector related. Anyone have any experience with this?

I want to pull my injectors and have them tested. I suspect an injector because there isn't a set consistent pattern to the jerkiness and the exhaust makes faint popping noises when it happens. I've only found 2 local web sites that say they test injectors and they're both diesel shops. What should I look for or ask about when trying to find a place to test them? Is there a name for the service or a special piece of equipment or anything? Thanks.

97WS6SCharged

Fuel Injector Connection can test them as well as rejet and match them. Is DFCO kicking in? If you're below 2000 rpm then it may be kicking on and off to conserve fuel which would cause the jerking & exhaust pops. It would be very noticeable on deceleration.

AdsoYo

There's a lot of views on this thread so I figure I'll update. There was no mechanical misfire. I swapped to a smaller cam with no overlap and used hptuners to run the car rich under light load conditions. Cleared up 90% of what I was experiencing.