Ok guys I got a issue. At lower throttle positions like 15-20 percent range I've got a odd jerking problem.

It kinda feels like a huge gust of wind hitting the car sorta. The rpm's and speed stay the same tho. It also does this reguardless of what speed or gear I'm in. Now just costing in neutral it DOES NOT do it at all. It seems like it matters what throttle position I'm in.

So I datalogged with hptuners all the way to work and the throttle position sensor worked fine nice and smooth changes. Now my map readings went from 20 kPa all the way to 70 kPa while crusing on the interstate. It hit 20 due to letting off the throttle tho I know that. But crusing at 70 it went from around 65 kpa to a hair over 70 kpa. And when it switched it did it very slowly but it changed when the cruise control had to adjust. The throttle position stayed at 15 percent most of the trip and varied little due to cruise control being used.

Now when I got to work and checked my cel I had P0105 Map sensor circuit insufficent activity and its not the first time I had it. The last time I cleard it. I also have the catalist effency below threshold but I do have a high flow cat so I don't know if that has anything to do with the jerking. Now my question is would that map cel cause my slight jerking when driving? Thanks in advance guys sorry its a long post

Well went to advance today and picked up a new map sensor and it seems good so far. No more jerking. Thanks anyway guys.

Well my problem came back. I have cleaned the connectors with electrical contact cleaner and it still happens. Any ideas guys?

well here we go again.. lol.. well yesterday was my oil change day and tire rotation day so i did all of that and in the process i have wanted to put my stock throttle body back on the car to get some of my low end tq back that i lost untill i do my turbo setup.. so i swapped to a stock throttle body and started the car and drove around for a while without any check engine light or jerking..

so after that the family and i went to walmart in richmond thats 20 miles away.. so we drove all the way down and back again without any jerk or cel.. odd i know.. so today i went to mom and dads which is 30-35 miles or so and again no jerk no cel..

so i talked to randall from jbok yesturday and the only conclusion we can come up with is that the throttle position sensor had a slight bad spot on it.. the reason we came up with solution is since the cel just said "map sensor circuit insufficient activity" to us it makes sense that since the j body uses both the map and tps to adjust the spark advance. what was happening is that if the tps had a bad spot then it would cause the throttle position to jump around on the computer and since the map was steady because of the throttle plate the information didnt match up in the map vs tps under the spark advance in hpt and caused it to say the map wasnt working like it should to match the throttle position when it jumped..

well lets just hope our solution was correct but so far after almost 70 miles it hasnt came back on yet....