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        General >> Problems >> Missing @ 2500----3200 rpm
        
(Message started by: peterphaynes on Apr 27^th, 2008, 8:28pm)

Title: Missing @ 2500----3200 rpm
Post by peterphaynes on Apr 27^th, 2008, 8:28pm

Hi all---thanks for accepting me as a member-have owned my 95 Scorpio ultima 16v 1998cc for a few months now--great car---Just developed a problem----when on full throttle--no problem when crusing at 2500--3200rpm in any gear the engine misses like its running out of fuel-when given more throttle problem disapears----would be greatful for any comments on where to start looking/checking etc-----With Thanks--Peter Haynes

Title: Re: Missing @ 2500----3200 rpm
Post by jonnycab on Apr 27^th, 2008, 8:36pm

Sounds like it could be a problem with the coil packs starting to break down under load :)

Title: Re: Missing @ 2500----3200 rpm
Post by ChrisF on Apr 27^th, 2008, 9:08pm

Before you go to the coils, and it could be that, try the MAF its situated right at the front, nice and easy. Try cleaning it, with carb cleaner, squirt the stuff all around the aperture get it really clean paying most attention to the small hole in the centre with two little filaments in, but, only use the spray do NOT USE ANYTHING ELSE, these filaments will be shattered with just a touch of a cleaning rag. You might be suprised at the results. Then again it will probable be the coils. Best of luck.

Title: Re: Missing @ 2500----3200 rpm
Post by ChrisF on Apr 27^th, 2008, 9:23pm

Dont forget to check with a spy glass that the filaments are ok after you've cleaned them. But anyway put it back cleaned and try it.

Title: Re: Missing @ 2500----3200 rpm
Post by TiberiuS on Apr 27^th, 2008, 10:56pm

Hi and welcome to the site :). The problem could be the MAF, worth giving it a claen even so. But far more likely as Jon said about some kind of HT misfire. Could be a failing coil or less likely plugs, be prepared though for the loom to disintegrate when you disturb it, the ignition loom has a nasty habit of doing this where it snakes behind the engine to feed the coils :(

If the loom is going bad, a roll of insulating tape should sort you at least in the short term, just be prepared before you disturb anything.

Regards, Bruce :)

Title: Re: Missing @ 2500----3200 rpm
Post by Octavian_P on Apr 29^th, 2008, 9:26pm

It could also be the EGR. It usually kicks in at about 2200 rpm when steady and makes the engine run horrible. Try disconnecting the top vacuum hose from the egr capsule and put a plug on it (on the hose not on the capsule)

Title: Re: Missing @ 2500----3200 rpm
Post by peterphaynes on Apr 30^th, 2008, 6:08pm

Thanks for the advice i cleaned out the MAF being careful not to damage the small sensors-the problem seems to have completely disapeared----a few of the wires to a couple of the sensors around the engine seem to have been losing their insulation but not to a great amount------and the coils were covered in a quick spray of WD40 ----Thanks to all-
Peter Haynes
96 2.0 Ultima - now running like a dream.
M804 HEW

Title: Re: Missing @ 2500----3200 rpm
Post by ChrisF on May 1^st, 2008, 5:14pm

Good at least we've got success, it often is the MAF, worth trying before you try the expensive options. Well done.