Developed a miss fire

[Richie350]

every time i put my foot down its like a cylinder has just been turned off, have cleaned out fuel tank, fuel filter, what next? crush it!!!!

[mgbond]

Richie350 said:

every time i put my foot down its like a cylinder has just been turned off, have cleaned out fuel tank, fuel filter, what next? crush it!!!!

Plug maybe?

[andygtt]

another vote for plugs... wrong type, gap etc

[snuffy]

Has it been out in a lot of rain ? I know I always ask that, but mine's had a misfire a time or two and it's always followed either being left out in a lot of rain or if I've washed it with a powerful hose and water has gotten in the engine bay.

[Richie350]

it has been out in the rain, but it seems dry in engine bay???

[GC1]

snuffys right.....got mine wet at weekend,turnd out to be fuel cap leaking in water,,,,now sorted...

[snuffy]

I found mine looked dry but then after driving for a few miles it would start to mis-fire, almost as if water was finding it's way somewhere where it shouldn't.

The two places I'd look are:

a) In the plug wells; I've been told that water can get in but can't get out so easily.

b) The lamda sensor plugs. These can get wet inside. I found loads of water in mine. They looked okay, but when I gave them a tap on my hand there was a lot of water. I dried them out with a hair dyers then after putting them back together, taped them up with insulating tape.

[Richie350]

i will try this, but even with a week in a heated garage its no different!!

[Richie350]

new plugs fitted, dryed everthing out with airline>>>> still miss fires when you press the load pedal, its like its had cylinders turned off, only does it under load????

[RobP]

After you've exhausted the other ideas you may want to change the low pressure fuel hose (from tank to pump). This has a habit of collapsing under load but usually occurs only when the engine bay is heat soaked. Symptoms are as you describe, but disappear when you replace the lp hose with high pressure hose.

[Adrian W]

Coil breaking down, swap banks and see if it moves to the other one

[bernhund]

andygtt said:

another vote for plugs... wrong type, gap etc

Any idea what the gap should be on the plugs?

[Richie350]

is there any filters inside the fuel pump??

[TuxMan]

no filter in tank , what did you gap the plugs at ?

[Richie350]

Hi Simon, hope your well

Miss fire started last week, and can only be described as haveing some cylinders turned off when you floor it. not as noticable at low revs. I have drained the tank, cleaned out the fuel filter, which was full of crap, i have since replaced the plugs NGK-BR7EFS set @ 30thou dried everything i can find out!!!!! still exactly the same. any help would be appriciated.

regards Richie

[Richie350]

Cleaned fuel take our AGAIN, checked fuel lines, clean filter AGAIN, re-checked every evectrical connection,had heater on car to dry out, still the same

[GTO400]

Have you checked the coil packs ?

[bernhund]

I was just wondering if it's possible to get a breakdown in the leads? I'm toying with replacing mine at the moment with a Magnecor set. I've heard
they're good.

[Richie350]

what leads, the coil packs sit directly on the plus!!! are the coild packs from the ford bin??

[snuffy]

Richie350 said:

what leads, the coil packs sit directly on the plus!!! are the coild packs from the ford bin??

Yes, erm, leads ?

The coils are indeed ford part. When I had this trouble I went to my local Ford dealer and they ordered me one. A Maverick is what they said it came off as I recall.