Post Stillen Supercharger Issue (Jerky Driving)
 

Post Stillen A2A Supercharger Issue

Hey guys,

So I just wanted to explain an issue that I am having to see if anyone else has experienced this and if so how the bested the issue.

1. A jerking and bucking sensation in all gears when normal driving, light acceleration pedal action.

2. More so when attempting to calmly drive uphill.

3. Car lost all accelerator response and got the P1239 CEL(TPS) twice now.

4. Bouncing idle, anywhere from 18.0-11.0. It will hover in the 14.7 area and these randomly bobble back and forth to lean and rich.

5. Cold starts in the morning are terrible, car will attempt to turn over, sound like a cammed v8 and then die, unless I mash the accelerator that is, it will fire up fine then. (I believe this to be a cold cranking MAP and not related to the above, maybe)

6. When going highway speeds+ I get the same jerky and bucking feeling, and sometimes my car will actually randomly like kick as in picks up a bit of speed.

7. Sometimes when starting from a stop (redlight etc...) it feels as if I have a super delay in power, the car will move but not like it should, and then it will all of a sudden kick up to the right power.

8. Lastly, this may not pertain to the main issue too but when I pull in a parking lot per say, or my drive way in 1st gear and let out of the clutch and gas the car will start to intensely buck back and forth like it can smooth itself out.

I have ordered the newly revised Stillen extension cables in hopes that they fix my issue. Any other advise would be greatly appreciated!!

Thank you :tiphat:

Make sure that you've got the right cables plugged in to the right spots. the cables and connectors are identical for the MAF and the throttle body with the exception that one has 6 wires and the other as 5. I did this when I first started the car up and had the same issue.
Also, rev 1 and 2 of my tunes were pretty jerky, so a revised tune might clear that up.
I've noticed that my car has been a little jerkier lately since that arctic front came through, so maybe that has some play in it

I didn't think cold could affect drive-ability like that, at least once the car is up to operating temps. I will insure the cables are in the correct spots.

You're most likely right. Unfortunately in the current weather conditions (before the snow and ice) my daily drive gets me to normal operating temp just as a reach the final 25 mph leg of my trip :(.

Oh man, so you are cold the whole commute :O
Better wake up earlier to start her up before you leave haha

Did you go from the water cooled system to A2A? If so you MUST retune. Seb is the answer!

Yeah I have been A2A for a few months now, tuned by Jon @Z1. 504whp. He says the tune isn't the issue that it is electrical or mechanical.

Smoetimes I think about taking a highway exit to take the "scenic route" in the mornings haha.:driving:

Anyone else have any advice on this?

Definitely get the new Stillen harness in the car and then relearn the TBs. I recommended wrapping them with foil as well. Seen this many times come through my shop.

I had a loose front timing cover sensor once after goofing around with my 350z. It acted just like this. Check all clips to anything controlling timing. There's two on the face of the motor, right by the sc bracket. One might have gotten slammed when putting the bracket back on. Look at your vvel clips too.

Timing cover sensor as in cam pos sensor?

That's it.

I have that same jerky driving under light load, I either end up gearing down and lugging it a bit or gearing up and running it a bit higher than I would when I'm cruising , I can power through it when it does it, my tuner noticed it in his drive home and tried to adjust, but it still does it. Only after the a2a we had this problem. Are you uprev? I've sense bought a ecutek cable from seb thinking that will be my solution but winter came before I could datalog.


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Yes I am using UpREV, after you go ECUtek let me get some feedback! I have thought hard about it.