Ford Scorpio Forum - Print Page


    
      
        Ford Scorpio Forum
        (https://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl)
      

        General >> Problems >> misfire on 2.0 16v
        
(Message started by: sprog on Oct 31^st, 2004, 8:57pm)

Title: misfire on 2.0 16v
Post by sprog on Oct 31^st, 2004, 8:57pm

i have an annoying misfire on my 96 2.0 16v ultima estate.the tickover is erratic,particularly when cold,and it coughs and splutters below about 3000 rpm.

if i put my foot down at low rpm it will accelerate very slowly until the 3000 mark,then take off like the proverbial scalded cat !

iv'e cleaned out the m.a.f. thingy with injector cleaner,but to no avail..............any thoughts,

cheers,john.

Title: Re: misfire on 2.0 16v
Post by scorpio_man on Oct 31^st, 2004, 9:22pm

hi there

sounds like it could be an air leak at the egr or a blocked cat. have the 2 rubber pipes came off the egr pipework. they're sticking out of the exhaust heatshield?

hth

Title: Re: misfire on 2.0 16v
Post by sprog on Oct 31^st, 2004, 11:00pm

thanks,scoprpio_man.this egr pipe work,can i see it from inside the engine bay or do i need to look underneath the car ??

Title: Re: misfire on 2.0 16v
Post by Eddie on Nov 1^st, 2004, 5:31am

They poke out the front of the exhaust heat shield. Two stainless steel pipes with rubber pipes going to a unit on the inner wing. All visible from under the hood (bonnet?). Check them for holes or splits.
Also part of the EGR system is a mushroom shaped device at the rear/right of the engine,there should be a rubber pipe coming from this,check it hasnt been pulled off.

I would seriously consider very careful examination of ALL the wiring associated with the ignition system.Check it for missing and flaking primary insulation. Especially under the top cover,where the coils/spark plugs live.

eddie

Title: Re: misfire on 2.0 16v
Post by Eric_R on Nov 1^st, 2004, 7:29pm

Sprog,
The DOHC engines are prone to a misfire caused by the insulation breaking down on the Ignition circuit. This is called the Fuel Cut-off Loom, and is dealt with on http://www.fordscorpio.co.uk/dohcloom.htm
Try that first.