Technical Jerking motion when accelerating GP - help!

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Technical Jerking motion when accelerating GP - help!

SCL

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Feb 24, 2015
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Hi all, my 2008 1.4 8v GP has a jerking motion when accelerating (no issues when gently accelerating)and seems almost hesitant at times when you put your foot down....no issues with breather pipes which I know can be at fault...any ideas what this could be????
 
Spark plugs checked during service in January....they look as good as new!
 
Have you plugged a reader in? If so any error codes?

Hi guys, sorry been super busy...

Ok so, reader plugged in....no error codes...spark plugs, no issues

As well as the hesitation when accelerating (it doesn't happen every time you accelerate), there is a little 'hiccup' when on idle...

Any ideas?
 
Are the plugs the correct original FIAT part? Any other recent service? Belts etc?
You can start by cleaning MAP sensor/ intake

(breather hose problem applies only to 1.4 16v engine with the pcv)
 
No major jobs done recently...gonna check out the MAP sensor tomorrow - let you know!
 
With no codes logged, the ecu believes that everything is OK.
So unless you're prepared to start throwing bits at it willy nilly, then you might just have to wait it out.

You may have an occasional misfire, but from experience a single hiccup was enough to illuminate the eml.
 
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