so my car has the aps tt set up and is uprev tuned. I am having an issue but im not sure whats causing it. Lets say at a red light or so or if im just trying to take off with it and stab the pedal , it will have a slight hesitation but if i just gradually get on the gas its fine. Under a load usually around 2-2.5rpms at partial throttle the car will start jerking as if its choking and it sounds like a cho cho train. It will keep blowing off choo choo choo choo untill i either let off or go WOT. WOT the car feels great. But partial it just hesitates and chokes espicially if im going up a hill. At first i thought it could be a bad bov so i replaced the aps bov with a tial and it still continues to do this. Ive tryed searching through various threads of ppl with similar circumstances but noone has ever stated a solution to this. Has anyone experienced this ? if so were u able to fix it and how? I would appreciate all your help! I no my tuner didnt really like the blitz boost controller i have. He didnt seem to really no how to use it . So could it possibly be something to do with that? It was tuned for 7.5 lbs but now that the cold weather is here it will spike up to 12lbs. But its weird it will maintain about 8 lbs until 5k rpms and then it will just shoot up to 12. For some reason once it hit 5krpms it just gets this extra jolt and it feels awsome but im on stock internals so its pretty dangerous. Again this is at WOT of course but if im just fooling around with partial throttle the car feels terrible it just keeps jerking and doesnt feel healthy at all.

 

What’s your fuel system look like?

 

its full aam fuel return system ...aam rails, rc 650 cc injectors, aeromotive 340 fuel pump and fuel pressure regulator

 

Had sort of similar symptoms in a buddies GTM TT. Was a oil fouled MAF.

 

ill have too take a look at it then thanks for the input !

 

I had some very noticeable hesitation and misfiring at 2-2500 rpm, it all went away after I installed CJM’s dampened fuel rails, not sure if it’s the same issue though…

 

if i stay steady on the peddle as its doing it it will continue to do it up the rpm range . its not like it just stops. I litterally have to let off or mash it . Its just driving me nuts. Its probably something so simple an stupid. I daily drive it so 2-2.5k is usually the cruising rpm. i just dont want anything major to fail from driving it like this.

 

continuous misfire will cause **** to fail.

make sure your TB is reset properly. Most likely its the same fuel resonance that some people have after removing all the stock dampers.

 

I asked my tuner for his opinion and he thinks its compressor surge which is what i originally suspected it was. But i dont want to belive it because i would think there would be way more ppl experiencing this with this kit but that isnt the case. I know there was one thread on here regarding surge with this kit that had the same symptons i am experiencing but it turned into a dead end as noone ended up updating what ended up happening for a solution. My tuner told me to try a 6lb spring in the tial bov to alliviate it or to get turbos with anti surge houseing. Im going to try the spring since it seems like the easiest step to take. What do u guys think? Has anyone else had these issues? Ill let you guys no if it works. thank you for all of ur suggestions guys ! Please keep contributing im open to hearing any opinions. Ill take all the help i can get

 

Check out the "lean spot at 2400 rpm" thread. The 2000 rpm hesitation sounds like fuel damping issue.