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Topic: Missing when I accelerate (Read 731 times) |
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ChrisF
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All the Granny's now the best 98 2.3 16v Ultima
  
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Missing when I accelerate
« on: Oct 8th, 2007, 3:40pm » |
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I have a problem, it is an anoying 'missing' when I accelerate I've tried changing the 2 cheaper plug leads but until i know definiatley I'm a bit reluctant to spend £140+ on the other two. It shows itself when I'm accelerating, some times giving a back fire, which makes me feel it is leeds in some way . . . . . . . . anybody help . . . . . . . please
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a900one
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A scorpio is for life not just for christmas
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Re: Missing when I accelerate
« Reply #1 on: Oct 8th, 2007, 3:49pm » |
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What are your plugs like.
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ChrisF
Full Member
All the Granny's now the best 98 2.3 16v Ultima
Posts: 136
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Re: Missing when I accelerate
« Reply #2 on: Oct 8th, 2007, 3:57pm » |
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New ones Platinum changed them first
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Snoopy
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Very old.BAD tempered and missing friends.
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Re: Missing when I accelerate
« Reply #3 on: Oct 8th, 2007, 4:06pm » |
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Hi There a FULL set of silicone leads are available at a lower cost that what you quote try
HERE for leads coils etc
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ChrisF
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All the Granny's now the best 98 2.3 16v Ultima
Posts: 136
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Re: Missing when I accelerate
« Reply #4 on: Oct 8th, 2007, 4:11pm » |
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Thanks Snoopy I want to make certain it is leads first
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: Missing when I accelerate
« Reply #5 on: Oct 8th, 2007, 4:15pm » |
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Sounds like it could be a problem with the coil packs 
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Snoopy
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Re: Missing when I accelerate
« Reply #6 on: Oct 8th, 2007, 4:17pm » |
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You can get those there as well , at what I think is a reasonable price
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ChrisF
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All the Granny's now the best 98 2.3 16v Ultima
Posts: 136
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Re: Missing when I accelerate
« Reply #7 on: Oct 8th, 2007, 4:17pm » |
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You mean the ones in nos 1 and 3
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Snoopy
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Re: Missing when I accelerate
« Reply #8 on: Oct 8th, 2007, 4:26pm » |
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What engine are you refering too?
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ChrisF
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All the Granny's now the best 98 2.3 16v Ultima
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Re: Missing when I accelerate
« Reply #9 on: Oct 8th, 2007, 4:27pm » |
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Oh well I suppose I'd better persuade the misses that we need more than wet string to make the plugs work coil packs it will be
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ChrisF
Full Member
All the Granny's now the best 98 2.3 16v Ultima
Posts: 136
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Re: Missing when I accelerate
« Reply #10 on: Oct 8th, 2007, 4:28pm » |
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2.3 16v
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pete from Hull
Senior Member
Non Scorpio at the moment, but still interested...
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Re: Missing when I accelerate
« Reply #11 on: Oct 8th, 2007, 4:34pm » |
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Wet string works allright on mine,,,, 
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Snoopy
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Re: Missing when I accelerate
« Reply #12 on: Oct 8th, 2007, 4:35pm » |
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ok Sorry I thought you were after 24v try HERe for 16v stuff
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ChrisF
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All the Granny's now the best 98 2.3 16v Ultima
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Re: Missing when I accelerate
« Reply #13 on: Oct 8th, 2007, 4:46pm » |
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Sorry Snoopy it is a 16v 2.3 thanks for the info considering the occaitional backfire (its happened about 3 times in about 500 miles) does your instinct point to the coils or anything else Thanks
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Snoopy
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Re: Missing when I accelerate
« Reply #14 on: Oct 8th, 2007, 6:10pm » |
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Check the wiring to the coil packs, it is prone to damage from heat and old age , but I am sure others with the 2.3 will be along to help more.
Have you read the article HERE
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: Missing when I accelerate
« Reply #15 on: Oct 11th, 2007, 2:39am » |
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Just re-read your original post about the backfire
Is it an engine backfire?....if so, engine backfire is usually associated with an air leak in the inlet manifold, causing the engine to run lean
Have you had the car for long ?....if not, do you know if the inlet manifold has been replaced prior to you buying it ?
The reason I'm asking is because the 2.3 is renowned for having it's inlet manifold replaced, due to it splitting on the thermostat housing, & new gaskets aren't always used 
If you've had the car for a while & it's only just started misfiring, with the occasional engine backfire, then I'd start by checking the coil packs.
There is no real way of testing them without some very expensive gear, but a visual check for cracks on the main body & multiplug connections may be an indication that it's time for a change of coils 
Also check the wiring to the coils for heat damage which causes the wire insulation to go brittle & crumble off, exposing the bare wire
Hope this helps
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ChrisF
Full Member
All the Granny's now the best 98 2.3 16v Ultima
Posts: 136
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Re: Missing when I accelerate
« Reply #16 on: Oct 11th, 2007, 7:46pm » |
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As an update to the problem I decided to take the cover off the plugs and have a look at the coil pack's. I only had time to check one so I checked the no 2, took it out, checked it, found a lot of oil but it looked ok, put it all back and what do you know, it all goes ok, .......... why.......what
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Missing when I accelerate
« Reply #17 on: Oct 12th, 2007, 2:13am » |
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The car probably went into self repair mode, they do that from time to time .....
Seriously though...oil on the plugs or coil would cause a weak spark & cause it to misfire & maybe the odd backfire.
Where did the oil come from though ?.... maybe a leaky rocker cover gasket ?
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