Hi all,
deveopled a problem ironically 1 week before the cars M.o.t....
basically when i floor it, or even give it a reasonable amount of gas it starts spluttering, very heavily/violently misfiring (in terms of power), and judders to buggery, making me look like a learner bunny-hopping . the revs splutter at 3200rpm and drop to 2700rpm, if i keep it flat it will eventually get past 3200rpm but will struggle and splutter...
if i go half throttle up the rev range it's mostly fine, no problems....
it also starts sputtering and struggling at 5000rpm upwards...
smells abit but think it's the excess fuel after every exhaust pop....
unplugged lamba sensor....stayed the same
unplugged maf... stayed the same
one of my wires to the distributor is abit chewed up and does need sorting, but doubt this would be the cause of it?
any ideas?
andy

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L333SYA - Ford Cougar 2.5 V6
RR - TBC

Id put my money on it being your lambda.

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Some people are like slinkies. Not really good for anything, but bring a smile to your face when pushed down the stairs!

From the moment I picked up your book until I laid it down, I was convulsed with laughter. Some day I intend reading it.

but would the lamba 'all of a sudden' go?
idling has been up/down for a while mind, may be linked...
cheers
andy

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L333SYA - Ford Cougar 2.5 V6
RR - TBC

I discovered some simlar symtoms when i forgot to plug in the air flow meter/MAF sensor.....but tht wasn't a fiesta

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i'd check that wiring out for a start

then try any bits out you can by swapping them over

make sure all your wires and plugs are plugged in correctly

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Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

Clean your MAF

How bad is this chewed wiring on your distributor?

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Quote Clarkson, Top Gear, 17th July: "I'm not having a stroke... just driving a Nissan!"
Quote Ry, Mallory Park, 3rd Dec: "Ahhhh crap... Just a bit too over eager really!"
"I used to be an adventurer like you, but then I took an arrow in the knee"

quite. i'll get a pic up and show you, it is really rather random though
i've got a spare MAF so willl swap it over...
cheers all
andy

_________________
L333SYA - Ford Cougar 2.5 V6
RR - TBC

spare maf might not do the trick, clean it

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

Here are the wires going to the plug that powers the Dizzy, think its obvious which one im on about




Swapped Maf to no avail.... both Mafs have been recently cleaned anyway so had a feeling it might not be the maf... the juddering seems far to violent to be the maf from my own experience...
andy

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L333SYA - Ford Cougar 2.5 V6
RR - TBC

Fix that wiring up for starters before it gets really bad. Doesn't look tooooo bacd, but obviously being exposed isn't doing it any favours.

Also, have a feel under that coil pack of yours and there's a little L shaped piece of rubber, these are prone to disintergrating and causing a hole in the vacuum. Might not solve your problem as it would cause slightly different symptons, but do it anyway as it might...

Not got a leaking injector or anything have you? Have you had a good look at everything in the engine bay before you buy any parts?

_________________


Quote Clarkson, Top Gear, 17th July: "I'm not having a stroke... just driving a Nissan!"
Quote Ry, Mallory Park, 3rd Dec: "Ahhhh crap... Just a bit too over eager really!"
"I used to be an adventurer like you, but then I took an arrow in the knee"

how would i fix that wire up out of interest because i was thinking of getting it done today but am abit of a newb with wires...
will have a poke around under the coilpack...
do you think its most likely a sensor or mechanical causing this?
cheers
andy

_________________
L333SYA - Ford Cougar 2.5 V6
RR - TBC

i'd put my money on this being an electrical/sensor issue. I see this all the time on the 306 forum and it's usually the lambda, ICV, or coilpack.

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Rest in peace Ben "Jam" Elvin. Gone but never forgotten.

_________________

Some people are like slinkies. Not really good for anything, but bring a smile to your face when pushed down the stairs!

From the moment I picked up your book until I laid it down, I was convulsed with laughter. Some day I intend reading it.

but i thought by unplugging the lambda sensor the ecu you use preset settings based on the MAFs reading, therefore it should run normal with the lambda unplugged or no? just wondered

_________________
L333SYA - Ford Cougar 2.5 V6
RR - TBC

_________________

Some people are like slinkies. Not really good for anything, but bring a smile to your face when pushed down the stairs!

From the moment I picked up your book until I laid it down, I was convulsed with laughter. Some day I intend reading it.

60k genuine miles. ford service history when i bought it....
seems like when these fiesta's hit 50/60k everything falls to pieces...
i could list my problems since turning 50k but i'd be here all day

_________________
L333SYA - Ford Cougar 2.5 V6
RR - TBC

with regards to that plug, go to the scrappers and get another plug from a zetec engine'd car, fiesta escort mondeo. and cut off a few inch of wiring with it, then replace the plug completely and solder the wires together than wrap it up in tape. thats what we had to do for my iscv wiring

_________________
Daily isn't so Special. And it makes me sad.
Need space and time and I'll crack on with Jams si!

Catch me on Facebook as I'm rarely on here.

_________________

Some people are like slinkies. Not really good for anything, but bring a smile to your face when pushed down the stairs!

From the moment I picked up your book until I laid it down, I was convulsed with laughter. Some day I intend reading it.

i had a similar problem, turns out i had a hole in a vacume pipe.

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Untouchable

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Quote Clarkson, Top Gear, 17th July: "I'm not having a stroke... just driving a Nissan!"
Quote Ry, Mallory Park, 3rd Dec: "Ahhhh crap... Just a bit too over eager really!"
"I used to be an adventurer like you, but then I took an arrow in the knee"