Hesitation when accelerating



  • Hello
    new to this forum, wife bought a 1.6 mx3 and i've noticed theres a slight hesitation when accelerating , can anyone help why this is happening .
    cheers



  • Hi, welcome to the forum, are there any modifications on the car? Check the air delivery hose, the one that runs from the airbox to the throttle body, thats a common component to have cracks and air leaks in it.



  • thanks for reply..

    No mods totally standard, cheers i'll check that out.



  • With the engine running you may be able to hear it if you put your ear close, or feel around it and you might feel the air going past your fingers



  • @0400c79777=Jesta:

    Hi, welcome to the forum, are there any modifications on the car? Check the air delivery hose, the one that runs from the airbox to the throttle body, thats a common component to have cracks and air leaks in it.

    Yeah, it sounds exactly like what Jesta has prescribed, more than likely it will be the large rubber air breather pipe, they have a tendency to split. Also mine has an extra little pipe coming from the airbox to somewhere which is a sensor, sometimes these can come off.

    The one arrowed here:



  • That little pipe runs to the EGR valve IIRC



  • @ea92106b7c=Jesta:

    That little pipe runs to the EGR valve IIRC

    Oops Incorrect….



  • glad I used the IIRC disclaimer then, might be beneficial if you had said what it was for…



  • @a333b09465=Jesta:

    glad I used the IIRC disclaimer then, might be beneficial if you had said what it was for…

    Well i would have but im on a phone for tinternet lol so currently unable to access me manuals but am egr is ( exhaust gas recycling ) and is cnnected to your rear mamifold for that… as for the item on question which for technical reason we shall call a thinga me bob lmao i shall give you an update as soon as i can cos i do know from experience its has a great effect on the running when faulty or incorrectly plumbed in ..



  • mine dangling loose as I fitted an induction kit, hasnt given me any problems?



  • @7e62bcb6de=Jesta:

    mine dangling loose as I fitted an induction kit, hasnt given me any problems?

    thats ok jesta but try disconnecting it or changing the popes around and then see how it runs itll be a dog…oh still aint had a chance to look it up lmao wot am i like... that aint a retorical question hahaha



  • @0a9e0979cd=Rainmaker:

    thats ok jesta but try disconnecting it or changing the popes around and then see how it runs itll be a dog…oh still aint had a chance to look it up lmao wot am i like... that aint a retorical question hahaha

    if I start changing popes around people will get upset



  • @b5ff64337d=Jesta:

    mine dangling loose as I fitted an induction kit, hasnt given me any problems?

    It will do.



  • ok then the part in question is a PRC (Pressure Relief Control) it sits between the airbox and fpr ( fuel pressure reg) And links to the ecu with data for intake vac pressure …when fitted incorrectly the ecu wll recoeve incorrect data on pressire inc fpr so a need to connect to the intake even woth an aftermarket induction kit is important..
    like i said previously just try swaping the pipes and ypull see it caises it to run like a dog incorrect fitting or a faulty unit will send for data to the eci effecting ot values.....

    Hope that helps clear that up lol....

    Rainy...



  • PS.. Sorry for the spelling im doing this via a mobile phone lol…



  • Hmmm, how can I connect it upto my induction kit? What if I spliced it into the crankcase breather hose?



  • @9cda6eb085=Jesta:

    Hmmm, how can I connect it upto my induction kit? What if I spliced it into the crankcase breather hose?

    What you would need is a T-pipe on the main breather pipe to attach it to.


Log in to reply
 

Looks like your connection to UK-MX3.COM was lost, please wait while we try to reconnect.