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EF occasional missfire 

 

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 Post subject: EF occasional missfire
Posted: Tue Sep 11, 2012 9:39 am 
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Age: 60

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Joined: 16th Oct 2011

Ride: EF Gli wagon

Location: blue mountains
NSW, Australia

Drove to Cooma on Saturday (from blue mountains).
Filled up on the Northern Road at the start of the Hume Hwy.
Engine missed a beat a couple of times during the drive, but 45km out of Cooma, really started to play up - was not sure if I was going to make it.
Anyway, filled up again at Cooma (fuel consumption higher than I expected - usually get 8-8.5lt/100km, but was 9.7lt/100km).
Drove it around a little the next day (Sunday) and it was fine, on Monday took it to a mechanic and he could find nothing wrong, even after a couple of drives.
Yesterday, missfired again going up a hill, so taking it in today to dump the fuel and put in a new fuel filter.
May be dirty fuel? I have no idea, but it's a start; do not want to drive back with it miss-firing as it was coming into Cooma.
Anyone else had this problem?

 

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 Post subject: Re: EF occasional missfire
Posted: Wed Sep 12, 2012 9:50 am 
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Ride: EF Gli wagon

Location: blue mountains
NSW, Australia

So....still playing up. I drives well, then splutter, splutter, splutter....then continues off as if nothing has happened.
Got the mechanic to dump all the fuel yesterday and install a new fuel filter...drove off to Lake eucumbene to (finally) do some fishing and after fifteen minutes of smooth driving....splutter, splutter, splutter....arghhhhhhh!.....turned around and drove back to my mate's place without a hiccup.
Taking it to the ford place now....the guy there said there is another filter near the tank.

 

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EF GLi Wagon. Burgundy. Gas shocks. Rear sway bar. Nice stereo & speakers. Factory bull bar. Driving lights. Roof racks. Great car. 2nd owner. 147,000km.

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 Post subject: Re: EF occasional missfire
Posted: Wed Sep 12, 2012 11:28 am 
Getting Side Ways
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Ride: AU Fairmont Ghia

Location: Elizibif Norf (Local Spelling!!)
SA, Australia

Is it only doing it within a certain rev range while under load? (eg going uphill, moderate acceleration etc)
The reason I ask is when the ignition leads stuffed up on my EF she presented very similar symptoms to yours, but only under load at about 2 - 2,500rpm. Felt almost like the trans was slipping as well as the engine spluttering and shuddering
I replaced the fuel filter, still did it.
Plugs, still did it.
Leads.... we have a winner!!
This was about a year ago and I haven't had the same problem since. I have also replaced the coil pack for added insurance, but that's in a prick of a spot!

 

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Au Fairmont Ghia
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 Post subject: Re: EF occasional missfire
Posted: Wed Sep 12, 2012 11:33 am 
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Ride: BA XT, NCII V8

Location: Adelaide
SA, Australia

my Ef fairmont did the same. had around 250ks on it. changed lots of things still had no luck, then one day i was putting on a Polished intake plenum that was all clean inside and it never missifred again.

The old one was full of oil, not sure if it was just luck or the chamber being full of oil and sometimes letting some into the cylinders was causing a issue.
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 Post subject: Re: EF occasional missfire
Posted: Wed Sep 12, 2012 11:44 am 
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Joined: 16th Oct 2011

Ride: EF Gli wagon

Location: blue mountains
NSW, Australia

Esteven8 wrote:
Is it only doing it within a certain rev range while under load? (eg going uphill, moderate acceleration etc)
The reason I ask is when the ignition leads stuffed up on my EF she presented very similar symptoms to yours, but only under load at about 2 - 2,500rpm. Felt almost like the trans was slipping as well as the engine spluttering and shuddering
I replaced the fuel filter, still did it.
Plugs, still did it.
Leads.... we have a winner!!
This was about a year ago and I haven't had the same problem since. I have also replaced the coil pack for added insurance, but that's in a prick of a spot!




No, it happens whenever it feels like it. One time starting a steep uphill at 60kph, a few times on the flat at 100kph, another time after turning a corner and accelerating (smoothly) away at 30kph.
The mechanics will look at it about noon - I will take both your comments.

 

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 Post subject: Re: EF occasional missfire
Posted: Thu Sep 13, 2012 7:26 am 
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QLD, Australia

Bugger of a problem - even dodgy injector/s might cause that sort of thing...

 

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 Post subject: Re: EF occasional missfire
Posted: Thu Sep 13, 2012 9:29 am 
Parts Gopher
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Joined: 10th Jul 2012

Ride: Falcon Xh

Location: Newcastle
NSW, Australia

I would be looking at electricity. Not fuel. Plug leads first. EF Coil on plug ??????? Cant remember. That second. if dizzy rotor and cap. Etc Etc Etc. Regards Daz
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 Post subject: Re: EF occasional missfire
Posted: Fri Sep 14, 2012 10:01 am 
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Joined: 16th Oct 2011

Ride: EF Gli wagon

Location: blue mountains
NSW, Australia

The ford mechanic in Cooma checked coils, leads, etc., and found nothing, so I thought bugger it, I've missed enough fishing days, so drove out to Lake Eucumbene from Cooma, 64km. If the thing broke down, it broke down.
Never missed a beat. Not only that, I also caught three trout (and lost a big 'un).
Never missed a beat driving back to Cooma the next day, either, and as it was raining and blowing a gale on my last day left to fish, I called it a day and drove back to the blueys.
It never missed a beat until about 40km from Canberra, when it started to play up again, but after about 15 mins of this it smoothed out and ran like a clock to Goulburn.
As it seemed to be playing up on the uphills, when I got to Goulburn I took the road to the blueys via Oberon, as it's quite hilly in places and figured that I might find if it's uphill sections, or a particular throttle opening, where the problem is, but nothing. Ran like a clock.
That was good (except it means that I could've gone fishing for those five days!) and now I'm home, will start cleaning the electrical stuff in the throttle, etc., using the contact cleaner found in computer shops.
The intake plenum....will look at that after all the easier stuff is done.
Cheers for your suggestions.

 

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EF GLi Wagon. Burgundy. Gas shocks. Rear sway bar. Nice stereo & speakers. Factory bull bar. Driving lights. Roof racks. Great car. 2nd owner. 147,000km.

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 Post subject: Re: EF occasional missfire
Posted: Fri Sep 14, 2012 12:20 pm 
Getting Side Ways
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Ride: AU Fairmont Ghia

Location: Elizibif Norf (Local Spelling!!)
SA, Australia

That's good news!
It may have even been a dodgy batch of fuel, or a loose connection somewhere.
What's the idle like? Is there a slight miss there? This tech doc explains how to clean the Idle Speed Controller (about 2/3 of the way down the page). This can get full of gunk and not close properly, however problems with this are usually only present at idle. But it may be a contributing factor.

 

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dc_todd wrote:
Cheap pads squeal like cheap hookers, and you can take that to the bank.


Au Fairmont Ghia
My (Old) 95 EF Wagon

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 Post subject: Re: EF occasional missfire
Posted: Fri Sep 14, 2012 1:19 pm 
Stock as a Rock
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Age: 60

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Ride: EF Gli wagon

Location: blue mountains
NSW, Australia

Yeah, I wasn't looking forward to the drive back, but it just cruised.
As for the idle, it's always been a bit lumpy....many thanks for the tech doc.
Looks like a simple job, so I'll clean the idle speed controller next week.

 

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EF GLi Wagon. Burgundy. Gas shocks. Rear sway bar. Nice stereo & speakers. Factory bull bar. Driving lights. Roof racks. Great car. 2nd owner. 147,000km.

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 Post subject: Re: EF occasional missfire
Posted: Fri Sep 14, 2012 1:41 pm 
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Ride: 2004 Ba Xr6

Location: Melbourne
VIC, Australia

paul w wrote:
Yeah, I wasn't looking forward to the drive back, but it just cruised.
As for the idle, it's always been a bit lumpy....many thanks for the tech doc.
Looks like a simple job, so I'll clean the idle speed controller next week.


My el had the same simular issue, had no power whatsoever but i replaced a few things. First my Leads Sparks plugs & injectors but it still had the issue of lagging when putting my foot down. Spent 10$ on a map sensor and it fixed the car .. The car purrs now and boogies like the day i bought it.. I suggest u change ur map sensor it only costs 10$ and map sensors help fix lack of power & stalling issues and other little things..Costs 10$ go ask a wreckers & they will get you one. It screws into the firewall where the vacuum line runs into & There should be one bulky plug underneth it, the map sensor also has numbers written on it..Top right area of the firewall. Goodluck
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 Post subject: Re: EF occasional missfire
Posted: Fri Oct 05, 2012 5:02 pm 
Stock as a Rock
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Age: 60

Posts: 148

Joined: 16th Oct 2011

Ride: EF Gli wagon

Location: blue mountains
NSW, Australia

Changed plugs and leads.
Still missing. Again, just on the odd occasion.
Will now try some of the suggestions made here.

 

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EF GLi Wagon. Burgundy. Gas shocks. Rear sway bar. Nice stereo & speakers. Factory bull bar. Driving lights. Roof racks. Great car. 2nd owner. 147,000km.

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 Post subject: Re: EF occasional missfire
Posted: Fri Oct 05, 2012 5:28 pm 
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Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
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coil pack on its way out?
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 Post subject: Re: EF occasional missfire
Posted: Fri Oct 05, 2012 7:13 pm 
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Ride: EF Fairmont

Location: Campbelltown
NSW, Australia

TROYMAN wrote:
coil pack on its way out?

+ 1 on the coil pack
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 Post subject: Re: EF occasional missfire
Posted: Fri Oct 05, 2012 7:32 pm 
Getting Side Ways
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Ride: S1 eb 5speed

Location: Coffs Harbour
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Sounds like coil or tps playing up
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