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Fiesta-Si.com :: View topic - reving problem

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reving problem https://www.fiesta-si.com/forums/viewtopic.php?f=4&t=14872	Page 1 of 1

Author:	sjarvis100 [ Sun Mar 29, 2009 10:54 pm ]
Post subject:	reving problem
Hey im new here, just wandering if anyone can help, I have a mk4 fiesta, 1.25 zetec s and its gota slight problem,... When i am accelerating to change gear when i get to about 3500 revs it dies, doesnt accelerate anymore, but if i keep my foot down eventually it picks up, it takes a while though, theres definatly something wrong, i thought it could have been the fuel filter, but iv changed that, and no improvement, i have also changed the plugs and air filter. If anyone could halp it would be muchly appreciated! Thanks Stephen

Author:	8r14ns3w311 [ Mon Mar 30, 2009 12:17 am ]
Post subject:	Re: reving problem
has it got a coil pack clean the MAF does it idle fine with not a SINGLE imperfection out the exhaust like a little break in the exhaust tone

Author:	sjarvis100 [ Mon Mar 30, 2009 12:20 am ]
Post subject:	Re: reving problem
Im not sure ill have to check, yep it idels fine, ill check tomorrow for nay imperfection too. Cheers what could ut indicate icf there were?

Author:	8r14ns3w311 [ Thu Apr 02, 2009 12:20 am ]
Post subject:	Re: reving problem
if it goes 'tut tut tut tut' out the exhaust then one or more of the 8 exhaust valves are either sitting bad or worn.... if it goes 'tut tut tut tut' out the air box in the engine bay then one or more of the 8 inlet valves are sitting bad or worn..... go to a garage and get a compression check on each cylinder....one of them will be low on compression which tells you the valve is not sitting good or it has worn down and has a hole in it.... hope it helps you out as my car has the EXACT same problem and mine is getting fixed on sunday ....£160 parts £200 labourer cam belt every single gasket head bolts oil antifreeze new valves(probley have to get collets n coller as well for the correct valve fiiting)

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