10 replies to this topic

[bigminikid]

My baby has a slight misfire and i checked the breather pipe and its cracked and keeps falling off, it may sound a stupid question but i am no mechanic, is this possibly why its misfiring? everything else seems fine.

Cheers

Dan

[philc]

My baby has a slight misfire and i checked the breather pipe and its cracked and keeps falling off, it may sound a stupid question but i am no mechanic, is this possibly why its misfiring? everything else seems fine.

Cheers

Dan

imo no, though you would need to fix it back on, check you have a good spark at the plugs, replace the points and condensor or even the coil. when and after you have done those and it still misfires, well who knows

[Russ528]

Mine was stuttering under load not long ago.

I replaced the following (for just over £40...so nice and cheap) which solved it and it runs lovely now.

- HT leads
- Distributor cap
- Rotor arm
- points
- condensor
- new spark plugs
- new coil

Edited by Russ528, 10 July 2007 - 09:32 PM.

[heavyhasso]

My baby has a slight misfire and i checked the breather pipe and its cracked and keeps falling off, it may sound a stupid question but i am no mechanic, is this possibly why its misfiring? everything else seems fine.

Cheers

Dan

Are you sure it is a misfire what are the symptoms? i.e. What is it you are experiencing?

[bigminikid]

it is definatly a misfire, my mate is a ford mechanic and he said its definatly a misfire. The problem is what is causing it and i know it could be a number of things but the likely suspect seems to be the breather pipe. Where it connects to the carb (i think!) its torn down and snapped halfway along it.

Cheers

Dan

[philc]

would not be the breathers mate

[Russ528]

forgot to add - I had a split breather hose on the carb too. I too thought that was a likely suspect. It wasn't.

[bigminikid]

Another point to add, it only seems to misfire when the engine is warm or when the outside temperature is hot. Does this help?

[Silicon Skum]

At a guess, I would say it's prolly your engine is in need of a de-coke. Possibly a tune up too (too rich / lean) and / or the timing is a little out.

Pull the plugs out and have a look in the plug hole with a bright (and small - like a pen light) torch and look at the tops of the pistons, check if they are encrusted with black carbon chunks / thick soot (a thin layer of soot is normal, thick and chunky is not). If so, a de-coke (head off job, or the cheapy "not-as good-but-better-than-nothing" way - Redex) is required (if the head is off, clean and lap the valves in at the same time). If plugs are black and sooty, then the fueling is too rich. White plugs indicate too lean, normal is tan (brownish) to blackish tan.

If engine is clear of excess carbon deposits, then the timing is prolly off - either adjust it yourself, or book it in at the garage.

SS

[Ethel]

Does the misfire occur at any particular point?

high revs, on overrun...

If you can make it do it with the car stationary you could play around with your plug leads to see if it's related to a particular cylinder.

[bigminikid]

Misfire seems to be solved, i just need to buy a new flange thing near the carb. i have tightened it up and now runs sweet without and chuggering when the the accelerator is put down.

I am still going to de coke the cylinders and piston heads and use some carb and choke cleaner just so i know everything is sorted.

Cheers for all your help anyhows

Dan