X-Type ( X400 ) 2001 - 2009
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hesitation when accelerating - RESOLVED

 
  #21  
Old 11-27-2014, 07:52 AM
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Meouch, you only need the one filter. As for the secondary filter, my car does not have that second filter. if you can, take a picture of what you are talking about. All you should have in your intake is the air filter, then a MAF sensor, then the throttlebody. Sure you are going to have a few lines coming off the side to provide the low vacuum lines for various pieces, but that is trival in the big scheme of things.
 
  #22  
Old 12-01-2014, 03:22 PM
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maybe there's no filter in there - but isn't there a box attached to the oe filter box? and it's attached to the oe intake hose after the maf sensor?
 
  #23  
Old 12-01-2014, 07:20 PM
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ok - there are two holes in the corrugated tube going to the throttle body - small one for vacuum and a bigger one - what's the bigger one for?
 
  #24  
Old 09-24-2018, 03:29 PM
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This problem seems to be contagious. My 2001 XK8 has exactly the same problem as aCapiz and was just noticed while touring in the mountains of Vermont. At first I thought it was just a rumble due to road conditions while accelerating up the mountains but it seems to have gotten worse. Interested in seeing if anyone finds the problem. In the meantime I will give it a dose of injector cleaner.
 
  #25  
Old 09-24-2018, 05:04 PM
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as i stated back in 2011.....new spark plugs and upper intake gaskets cured it for me.
but i have an x type and this is an x type forum
 
  #26  
Old 09-25-2018, 11:02 AM
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Originally Posted by Meouch View Post
maybe there's no filter in there - but isn't there a box attached to the oe filter box? and it's attached to the oe intake hose after the maf sensor?

That's a resonance box, it only has a connection the the air intake.
 
  #27  
Old 09-25-2018, 01:43 PM
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Originally Posted by x_type_lpg View Post
That's a resonance box, it only has a connection the the air intake.
where were u 4 yrs ago when he asked that?
 
  #28  
Old 09-26-2018, 03:33 AM
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Originally Posted by iownme View Post

where were u 4 yrs ago when he asked that?

Deep Thought
 
  #29  
Old 07-05-2019, 12:19 PM
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Originally Posted by iownme View Post
hi all, still totally in love with the jag and having a small problem.
Often, especially when cold...when accelerating on an on-ramp from 30-50mph, the engine starts hesitating.
It clears up if i give it more gas or if i let off the gas a little.

It feels vacuum leak related possibly. Any idea what might be causing it?
Greetings, iownme,
Thanks for your informative posts, which for the most part are well beyond the pale of my understanding and mechanical capacity. I have this terrible stuttering issue between 1000-2000 RPM, and often down-shift to get RPM's up and stop the stuttering/hesitation. This post is titled "hesitation when accelerating - RESOLVED," yet I could not find a clear resolution. My mechanic said it was a 'fuel issue'; old Jags not designed for new fuels with ethanol, etc. Basically, he brushed me off. His answer VERY unsatisfactory. As a frequent contributor to this forum, can you kindly shed some DEFINITIVE light on this issue? I want to give the car to my son, but can't while it runs like this. Finally, I only just joined this Forum and have NO idea of rules and regs, but can I Venmo you $25 for your insight, please? Thanks, Miguel
 
  #30  
Old 07-05-2019, 01:14 PM
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Iownme left this forum after years of helpful contributions because of a mod. The best advice I can give you is use the SEARCH function and read, read, read and then read some more. NEARLY everything that has happened to an X Type has been discussed more than once here. The years of posts are a great source for research.
 
 
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