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Ford Sierra 1.8 CVH (ESC Hybrid) misfire under high load, low revs.
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CarGuru > Ford > Ford Sierra 1.8 CVH (ESC Hybrid) misfire under high load, low revs. 9 April 2005 16:10:33
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Ford Sierra 1.8 CVH (ESC Hybrid) misfire under high load, low revs.

Swinster 8 April 2005 20:38:03
 Hi,

This problem has been bugging me for ages. I have a 1.8 CVH that
exhibits a misfire problem and high load conditions at low revs. (E,g
pulling up a steep hill in second, or even just flooring it in third
with the engine at about 1500 rpm). It's like the advance is way off -
but of course there is no manual adjustment of the advance. Releaseing
the throttle and reapplying sometimes clears the problem and when she
picks up she flys (as best a 1.8 CVH can fly!)

I have bypased the fuel seperator, chnaged the ECS module and crank
sensor (albiet with second hand parts), checked it over on some
crypton tunning kit (which checks out fine), even changed the fuel
pump push rod.

Anyone have any ideas?

The car has inetermitantly died on us a few time in the past as though
all electrics went, only to be able to start some 10 minutes later,
but this hasn't happened for a while - possibly through one on the
changes mentioned above.
Add comment
Carl Bowman 8 April 2005 20:48:53 [ permanent link ]
 "Swinster" <swin@fab-sas.co.uk­> wrote in message
news:56a81752.05040­80838.23ecff75@posti­ng.google.com...> This problem has been bugging me for ages. I have a 1.8 CVH that> exhibits a misfire problem and high load conditions at low revs. (E,g> pulling up a steep hill in second, or even just flooring it in third> with the engine at about 1500 rpm).
Anyone have any ideas?

Could be an earth fault. The symptoms below sound very similar to those I
had on a Cavalier with a corroded engine earth strap, which got gradually
worse before eventually dying (on a cold wet day of course).
The car has inetermitantly died on us a few time in the past as though> all electrics went, only to be able to start some 10 minutes later,> but this hasn't happened for a while - possibly through one on the> changes mentioned above.


Add comment
Pete Smith 8 April 2005 22:54:15 [ permanent link ]
 In article <56a81752.050408083­8.23ecff75@posting.g­oogle.com>, swin@fab-
sas.co.uk says...> Hi,>
This problem has been bugging me for ages. I have a 1.8 CVH that> exhibits a misfire problem and high load conditions at low revs. (E,g> pulling up a steep hill in second, or even just flooring it in third> with the engine at about 1500 rpm). It's like the advance is way off -> but of course there is no manual adjustment of the advance. Releaseing> the throttle and reapplying sometimes clears the problem and when she> picks up she flys (as best a 1.8 CVH can fly!)>
I have bypased the fuel seperator, chnaged the ECS module and crank> sensor (albiet with second hand parts), checked it over on some> crypton tunning kit (which checks out fine), even changed the fuel> pump push rod.>
Anyone have any ideas?

Sounds like the problem 2.0 Mondeos have, which is a misfire (normally at
high revs) under load.

New plugs, leads, and plug gap less than the recommended gap solved it.

HTH

Pete.
Add comment
SteveB 9 April 2005 10:39:37 [ permanent link ]
 "Pete Smith" <pete_news@lethe.or­g.uk> wrote in message
news:MPG.1cc0e3b428­0e5aad9896a0@usenet.­plus.net...> In article <56a81752.050408083­8.23ecff75@posting.g­oogle.com>, swin@fab-> sas.co.uk says...>> Hi,>>
This problem has been bugging me for ages. I have a 1.8 CVH that>> exhibits a misfire problem and high load conditions at low revs. (E,g>> pulling up a steep hill in second, or even just flooring it in third>> with the engine at about 1500 rpm). It's like the advance is way off ->> but of course there is no manual adjustment of the advance. Releaseing>> the throttle and reapplying sometimes clears the problem and when she>> picks up she flys (as best a 1.8 CVH can fly!)>>
I have bypased the fuel seperator, chnaged the ECS module and crank>> sensor (albiet with second hand parts), checked it over on some>> crypton tunning kit (which checks out fine), even changed the fuel>> pump push rod.>>
Anyone have any ideas?>
Sounds like the problem 2.0 Mondeos have, which is a misfire (normally at> high revs) under load.>
New plugs, leads, and plug gap less than the recommended gap solved it.>
Pete.

It's the classic symptoms of a weak spark so I would tend to agree. If not,
then ignition coil.


Add comment
Swinster 9 April 2005 16:10:33 [ permanent link ]
 Well, the consensus for here and other forums was that this is an HT
fault, so even though I thought the HT had been looked at sometime ago
by our garage, I toodled off down this road.

I flipped off the distributor cap and there were some hefty build-ups
on the contacts so I scrapped these off and cleaned them with a bit of
fine sand paper and did the same for the rotor arm. No joy, in fact it
seemed to make things worse!

So I went off an bought a new rotor arm and dizzy cap and installed,
but only after making the basic mistake of pulling all the leads off
and not remembering the firing order or rotor arm rotation (moppet).
After this was looked up a a local garage opposite the motor factor's
we back in business, but still with a misfire.

Therefore, that leaves plugs, leads and coil. I was sure that the
leads were replaced by our garage but even so, I had limited tools
with me to thought that that would be the next move. One set of leads
latter (this time carefully replaced one at a time!) and bingo – no
more misfire.

It just goes to show that servicing does not always pay to be done a
garage! Thanks for every one who suggested HT side of things. At least
it has saved me the cost of an diagnosis at the Ford dealers next
week.

"SteveB" <sbrads@nildramDOTc­oDOTuk> wrote in message news:<paadnfjsKYE-5­crfRVn-oQ@pipex.net>­...> "Pete Smith" <pete_news@lethe.or­g.uk> wrote in message > news:MPG.1cc0e3b428­0e5aad9896a0@usenet.­plus.net...> > In article <56a81752.050408083­8.23ecff75@posting.g­oogle.com>, swin@fab-> > sas.co.uk says...> >> Hi,> >>
This problem has been bugging me for ages. I have a 1.8 CVH that> >> exhibits a misfire problem and high load conditions at low revs. (E,g> >> pulling up a steep hill in second, or even just flooring it in third> >> with the engine at about 1500 rpm). It's like the advance is way off -> >> but of course there is no manual adjustment of the advance. Releaseing> >> the throttle and reapplying sometimes clears the problem and when she> >> picks up she flys (as best a 1.8 CVH can fly!)> >>
I have bypased the fuel seperator, chnaged the ECS module and crank> >> sensor (albiet with second hand parts), checked it over on some> >> crypton tunning kit (which checks out fine), even changed the fuel> >> pump push rod.> >>
Anyone have any ideas?> >
Sounds like the problem 2.0 Mondeos have, which is a misfire (normally at> > high revs) under load.> >
New plugs, leads, and plug gap less than the recommended gap solved it.> >
Pete.>
It's the classic symptoms of a weak spark so I would tend to agree. If not, > then ignition coil.
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CarGuru > Ford > Ford Sierra 1.8 CVH (ESC Hybrid) misfire under high load, low revs. 9 April 2005 16:10:33
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