Hi,

 

I have another problem :( (other is heater problem - see other thread), I am having a dead spot in acceleration on my JAP NA, from about 1500 - 2500.

 

Mainly happens after breaking/slowing right down (say whilst turning at a junction - which is a pain/dangerous) - put foot on accelerator and the car feels like it drops in power & then picks up fine after about 2500rpm all the way to the redline.

 

Its hard to describe, stick your foot on accelerator & for about 1-2secs hardly no acceleration (watching rpm's, very slowly raises, then after 2500rpm very fast acceleration to redline as normal.

 

I have had a custom stainless steel exahust system (decatted) fitted recently but I think I had the problem to a certain degree before it was fitted.. The battery was disconnected duing the installation/service/mot so the ecu must have been reset at some point (as clock had reset).

 

So whats it likely to be/any ideas on how to fix it...??

 

Cheers

 

Barry

I've been having the same problem recently, but on my TT. I presume there's a similar problem-solving route- if you do searches along the lines of hesitation and rough running then you'll get a few pointers, but it could pretty much be anything! :(

 

First off do ECU diagnostic and O2 sensor check to make sure nothing obvious has failed.

 

If that's clear then the fun starts...

 

I first thought it was vacuum hoses, so I replaced the ones that were loose- no change.

 

Then I did the diagnostic and noticed an O2 sensor appeared lazy; however it's not easy to say whether it was the cause of the symptom! :confused:

 

After that, it was recommended I upgrade to a Series 2 PTU. That hasn't solved it either, but I consider it preventative maintenance :D

 

Doing the PTU swap I noticed that the driver's side throttle pipe was split at the throttle end, so I'm just waiting for the new one of those to arrive to see if that cures it.

 

Other recommendations are check air filter, AFM, throttle bodies and check all electrical connectors in general.

 

Make a list, and cross things off as you get through them (it'll be a long list, but don't lose heart- you'll cure it in the end!)

 

Mark