To be honest this might be totally unrelated cause mine hesitates only when I accelerate from a stop or when I have my foot off the throttle and back on to accelerate. And only in 1st gear or when I start out in second. At no other time is there hesitation through the rpm range. Less than 1000 rpm I'd say.

 

I think you are on the right track. These cars are not the most responsive to begin with and "secondary air" has been a hunting issue since they came out!

 

the car doesn't like to do anything moving under 1k rpm .. and it does like ipd plenums while being decatted. parts need to be matched, and some match up better than others.

i think your issue is wholly different from the op's. just don't expect much from starting out in 2nd or under 1k rpm... it will never be happy.

 

I have mafless, straight pipe and Evoms cone filter. But the issue was there before any mods.

 

Good idea, I'll try the stock tune.
Running Stock plenum. What's the TB reset got to do with this issue since the hesitation goes away momentarily after, but comes back almost instantly?

 

I will try to log it and send it to you.

 

I noticed the hesitation occurs always on the same throttle application. With slow steady pedal application, throttle angle jumps rapidly from ca.5% to over 8% and the stumbling occurs. Like the throttle plate was sticky? I'm still suspecting faulty TPS without triggering codes. I sent Sam some loggings, hopefully he finds something.

 

Thanks man. Let me know what transpires. My hesitation is liveable but it's just different than stock and maybe the nature of the car with such high flowing outlet. Maybe I just need new turbos and intercoolers now so the front side matches the back

 

Log ign angle and see if it is stable when hesitation occurs.

 

She's a slight bit lean at that tip in point where you're feeling it. Going to make an adjustment but check with my team to see if we can see something causing it. With the throttle being stuck I would almost expect to see the opposite. It could just simply be the set up so I'll send you something to try today mate! How does she feel otherwise? Is the last adjustment we made running good?

 

I get a weird hesitation to. At idle about 800-900 rpm it sometime has a hick up idle drop a bit and it picks back up immediately. You still could see the needle struggling to stay up to normal idle. Eventually it became normal. What could cause this?

 

So so so many things. These cars are getting older. I have had 3 myself and living with them showed me more than working on them. It's a long intake tract pre and post turbo. Lots of lines, hoses, valves and solenoids to check. Then the dirty throttle bodies, gaskets and more let alone different hardware. Even totally stock after a while they can smoke on start up, hick up here and there and they don't love load at low rpm. That said they are amazing cars and should for the most part run pretty well with a good set up so there is lots to check and make the car better.

 

of corse it is not possible to repair the car remote.... have you ever try do run the car without maf ? idle problems and hick up often are maf problems (or vac leaks at the long intake) if your car runs at idle good without maf, it could be a problem at this points ...this test is not expensive and quick done

 

Had this exact issue for years on my tuned x50. Fixed all the boost leaks, and still, no dice. I finally bit the bullet and got the Cobb Accessport, had it tuned - problem went away. Granted its only been 3 days, but thats 3 days with ZERO hesitation / surging. I cannot reproduce that behavior...so far I'm a happy camper!

HTH,

Deepak

 

The ignition angle sways up/down when the hesitation occurs.