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        General >> Problems >> Pfft sound when revving.
        
(Message started by: Chaoslord on Jun 7^th, 2006, 6:41pm)

Title: Pfft sound when revving.
Post by Chaoslord on Jun 7^th, 2006, 6:41pm

I've been experiencing some lack of power on my 2.3 16v when i depress the throttle too fast, and when i tried to investigate this, I noticed that when i rev the engine quickly, there is a pfft sound coming from the back left of the engine (when standing in front of the engine ;) ), and then it revs. If i pull the throttle wire slowly, there is no such sound, and the engine revs normally.
There is perhaps a 1 sec delay from when i pull the wire, until the engine revs.

Can anyone shed some light on this?

Andy

Title: Re: Pfft sound when revving.
Post by Matt on Jun 7^th, 2006, 7:40pm

you may have a split pipe or one thats dropped off the vacuume chambers at the back of the inlet manifold

Title: Re: Pfft sound when revving.
Post by Octavian_P on Jun 7^th, 2006, 8:19pm

Maybe this could help

http://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl?board=Problems;action=display;num=1148719528

PS: mine does the same sound and the same "hiccup" when accelerating too fast. Haven't figure out what could be wrong. :-/

Title: Re: Pfft sound when revving.
Post by philgood on Jun 7^th, 2006, 8:22pm

I had a similar problem with my wife’s Escort. Lack of power and strange noise from engine compartment. Originally I thought it was the catalytic converter blocked but eventually traced it to the back box had failed and blocked up. Simply had it diagnosed then replaced at the local exhaust centre. Hope this helps?

Title: Re: Pfft sound when revving.
Post by scorpio_man on Jun 7^th, 2006, 10:04pm

hi there

give the sparkplugs the once over. they can work lose on the 16valver. also check the gap as it doesn't like it too big! ;)

hth

Title: Re: Pfft sound when revving.
Post by Octavian_P on Jun 8^th, 2006, 9:25am

A firend of mine had the same problem on a mondeo, when the accelerator was suddenly pushed the engine was starting to stall. The problem was the spark plugs, one of them was letting a spark to jump from under it right to the engine block. Then engine was a 2.0 litre one and has long spark plugs just as the 2.3 has.

Title: Re: Pfft sound when revving.
Post by Chaoslord on Jun 8^th, 2006, 11:27am

Thx alot guys.
I'll change the plugs, and go over the hoses and such.

Andy

Title: Re: Pfft sound when revving.
Post by bootiful-scorpios on Jun 8^th, 2006, 12:29pm

do your pfft sound similar to a exhaust blow ?