six3mike

iTrader: (19)

I installed my Motordyne 5/16 spacer and changed my spark plugs a couple of weeks ago. When I turned it on you could feel the engine kind of wobbling. Only way I can think of describing it. I only feel it while in nuetral. It idles fine but while I'm holding the clutch in or in nuetral I can feel it and hear it. I was hoping that when I got it tuned afterwards it would take it away but it didnt. He told me I had some knock at my top end he took it out. Anyone have any idea whats up with my junk.

hwcustoms

iTrader: (40)

Possibly an air leak on the spacer or vacuum hose. Sure all the hoses are hooked back up?

Did you gap the plugs?

six3mike

iTrader: (19)

I read somewhere not to gap them. That they were good to go from the box. I'm going to go back and check all of the hoses.

hwcustoms

iTrader: (40)

I would say if it is wobling and running rough you have a vacuum hose that did not get connected or is pinched. MAF sensor hooked back up correctly?

six3mike

iTrader: (19)

It runs fine. I only feel it when I'm not giving it gas.

JCstart

iTrader: (6)

I have the same exact problem... since I get out my car this spring... maybe the gas stabilisator ? very weird ?

but everything is find when you hit the gaz and the car pull strong at WOT...

but at idle... another story...

rcdash

iTrader: (18)

that's when it's at vacuum - check for leaks around the entire perimeter - make sure the oil inlet rubber surround is not caught in between etc.

Wired 24/7

iTrader: (2)

I would just raise your idle, problem solved.

failsafe306

iTrader: (38)

^^bandaid

Really sounds to me like you left off a vac hose somewhere. Check the one that connects to the underside of the air intake tube, the one that goes from the airbox into the throttle body, and report back

Wired 24/7

iTrader: (2)

All VQ35DE's seem to have a pretty rough idle, increasing the idle really helps.

Of course the OP should check for possible installation problems, but I doubt that's the problem IMHO.

six3mike

iTrader: (19)

My idle is fine. It doesnt fluxuate or anything. I'm going to check my vaccum hoses. Thanks.

JCstart

iTrader: (6)

I don't know for you, but mine do this when hot only...

I did not found any vaccum leak...

gothchick

iTrader: (12)

To the OP: It you're currious about a plenum leak, take it to a shop that has a smoke machine. They'll hook it up to the plenum vacuum line, and fill it with compressed uv reactive smoke. If you have a leak, you'll be able to see it... Peace of mind = priceless.

JCstart

iTrader: (6)

I do not have any plenum spacer...

six3mike

iTrader: (19)

Thanks. I'll look into that. I drove it today and tried to get a better feel for what it is actually doing. It's kind of like a vibration that I feel at idle or when I let off the gas. I just feel it thruthe floor board. Kind of weird.