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        General >> Problems >> Re: misfire 2.3 dohc (98) saloon manual
        
(Message started by: bigmaltwo on Aug 18^th, 2005, 11:41pm)

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by bigmaltwo on Aug 18^th, 2005, 11:41pm

i had exactly the same symptoms on my 2.3 ultima. was down to the usual dodgy wiring to the coils packs (fuel cut off loom). please double check the feed wires to the coils packs to ensure that there are no signs of damage to the insulation, or to the wiring itself. good luck.

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by scorpio_man on Aug 19^th, 2005, 8:03am

hi there

also check the pipework to the EGR valve. try running the car with the small vac pipe dis-connected and blocked. see if that helps any.

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by scorpio_man on Aug 19^th, 2005, 12:54pm

hi there

it's number 7 in this diagram.
http://www.fordscorpio.co.uk/images/egr24v.gif

2nd picture down shows you on top of valve.
http://www.fordscorpio.co.uk/egrrepair.htm

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by scorpio_man on Aug 19^th, 2005, 3:53pm

hi joe

all the egr valves are the same, only the pipework/position is different.

have you had a obd-2 scan done? maybe the lambda sensor has failed. a scan would reveal all.

hth

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by joe_murphy on Aug 19^th, 2005, 7:51pm

scorpio man wife informed me "she forgot to say" that the ac isn t working sure enough i checked it and the light doesnt allum and its not cold or kicking in as it did before funny how it stopped when she went to her mums for the weekend same time as it started misfiring when she gave me it back after her trip you thinkk this is anything to do with my overall problems of misfireing under load fuses 8 33 34 17 16 all fine connections look ok button doesnt derpress in on daSH TO OPERATE AC BUT CANT REMEMBER IF IT DID DEPRESS
kind regards
joe

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by scorpio_man on Aug 19^th, 2005, 8:52pm

hi there

i wonder if what you think is a mis-fire is the a/c compressor kicking in and is seizing a bit? :-/ put a post in the obd section and see if there is someone local to you.

something seems to have happened, though. overheated? a scan would definately help.

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by bertie on Aug 19^th, 2005, 9:06pm

have you checked the coil packs to the spark plug? look at spark plug for tracking marks.......thin black lines. Coil packs are prone to cracking thus causing mis fires.

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by bigmaltwo on Aug 21^st, 2005, 3:02am

had mine checked at work using the snap on mk 2 gizmo. not a flaming thing showing! only spotted damaged wiring when changing plugs in an attempt to cure it! lambda sensor is needed! exhaust gas readings will be well out of spec if not!! normal mot testing equipment will do.

Title: Re: misfire 2.3 dohc (98) saloon manual
Post by ChrisB on Aug 22^nd, 2005, 7:42pm

on 08/19/05 at 16:42:39, joe_murphy wrote:

can the lambda sensor be short cut to see if it works theres no obd around here ford say two weeks to book in im in bordon hampshire anyone local with an obd bive got a long trip to take bank holiday weekend hoping to get it sorted by then
kind regards joe

Joe have replied to your ODB request thread , drop us a PM or reply here.

ChrisB