My MSP is driving me crazy

[Wheredjaredgo]

Ok I bought her like 6 months ago and she's had a few issues and I've slowly been fixing things here and there as my budget allows... I would really like to fix this current bothersome issue... What happens is when I let the throttle go, even if I let off the gas very slowly the car jerks forward three times... Doesn't matter what gear I'm in but it's much less noticeable in 5th gear than any other. When I let the throttle go Rpms are staying the same it's just the car shaking... It's the most annoying thing in the world I drive the car 2 1/2 hours a day so I'm in it all the time.
Ive already replaced all the motor mounts two of which I upgraded to solid mounts and I've also installed a torque damper to the passenger side motor mount.... Now if anything the replacement of these mounts and installation of this torque damper has made this throttle release even more jerky... I shoul just put the old broken mounts back in because they did a better job of hiding the problem... Three of the mounts were completely broke before but the car ran smoother back then... I currently have a CEL for my VTCS short or something but I don't think that would cause my issue.. Car runs perfectly when I have my foot on the gas in any degree like just barely pressed or full throttle... The car has had the problem since I bought it and three months later the CEL came on that's also why I wouldn't think that the VtcS problem has anything to do with this throttle issue. Any ideas you guys have are welcome. Also I must mention when I crank her up first thing in the morning and the Rpms are at 2 1/2 Rpms for a min or two the throttle has zero issues no letback when I let the throttle go, but then when she warms up she has the issue all day long. I've got new plugs new air filter new coils new wires new mounts and torque damper. Help Me

 

[Preferio]

I didn't read any of that, just the title...

Being driven crazy by your MSP when you own one is completely normal.

Even more so when you are mentioned locally to new MSP owners and you get text/calls/facebook messages asking for help and you end up chasing problems on other peoples cars, though most of them I've experienced so it's not too exhaustive.

 

[destineal]

I would fix the VTCS issue 1st then see if the problem still exists. I also would not go back to the broken mounts, but the solid mounts are doing less of a job of masking the prob.

 

[Wheredjaredgo]

Does anyone know what those two vacuum switch solenoids on top of the intake manifold are responsible for? What is their purpose... I just found a broken plastic nipple on the left one. I don't think that is my throttle issue but I've already bought a replacement on eBay and when it arrives I'll switch it out.

 

[destineal]

Those are the solenoids for the VTCS and VICS

 

[Wheredjaredgo]

I've replaced the vtcs solenoid and there's no change... same problem... Any one have any ideas? I'm kinda giving up here. I'm gonna set this car on fire next weekend

 

[Alejo_NIN]

florida? what part? sflamazdacrew.com
if down south miami/ft lauderdale i can help

 

[Brains]

trans issue maybe? Who knows... i don't, but please don't set you car on fire. That would be sad :'( Sticky throttle body maybe... or a vacuum leak?

 

[Wheredjaredgo]

Northwest Fl destin... My boost gauge is reading -20 pretty study... I was thinking tranny maybe too but my tranny seems really solid and has never made any noise or slipped or anything and the car Doesnt have the issue for the first two minutes after cold start up. I'll check the throttle body plate tomm.. I don't wanna set it on fire but I may have to part it out and sell the shell to the junk yard.

 

[destineal]

Is everything stock? No fmic?

 

[Wheredjaredgo]

It has a fmic and hard pipes with atmospheric Bov with cold air intake...boost is suppose to be stock but it's study at 8 lbs or so... I think the motor is forged too but I haven't pulled my oil pan to check yet.. I'm gonna do that next oil change but as far as EMS or Ssafc or tune I ain't got one.. I'm on stock ECU non reflashed. I suppose I'm gonna check my throttle body along with the Tps, Iacv this weekend.

 

[Alejo_NIN]

please post pics of your engine bay
i'm suspescting a venting bov wihtout recirculation and no relocated MAF

 

[Wheredjaredgo]

Nah don't think so... If I drive like a grandpa and never go into boost at all it still does the jerk.. The blow off valve and Maf aren't the issue here. Somethin else

 

[Spiced MSP]

yeah I doubt it, I have driven without a relocated maf and 100% vented before with no issue like this

 

[Alejo_NIN]

nope, you will still stall if no rec and no relocated maf...

but oh well...

 

[Spiced MSP]

yeah, the stalling issue will still be there but it wouldn't cause the jerking

 

[Wheredjaredgo]

There is zero stall issues with this car... The Rpms don't change at all when the car jerks... I could rev to 8000 Rpms really quickly let go push the clutch in and the car would go to idle 750 Rpms without dropping any lower than that.. It has nearly zero idle issues ever. Trust me this isn't a maf issue

 

[CHIQLES]

butterfly sticking issue.

 

[Wheredjaredgo]

ok.....im an idiot....but ive never had a Race car before..... i spent the last few days dissasembling most of my car checking vacuum, cleaning throttle body, checking sensors like VTCS, IACV, TPS , vac solenoid replacement and even dropping my oil pan and much more... Im excited to inform you guys i Found out im completely Forged wiseco pistons, K1 rods, Lightweight flywheel and super heavy 6 puck clutch....Thats what my problem is Lightweight flywheel and 6 puck combo...ive never driven anything other than a Stock clutch before and my Msp clutch is rediculously strong and my new motor mounts and torque damper only make the clutch more sturdy.. so as i think im helping by replacing motor mounts im only making my race clutch more noticable. So i at the end of the day ... i guess i just need to get used to this clutch because it seems perfect for a quick 0-60. thanks guys