26 replies to this topic

[razorsharp192]

clubman gt:
1975:



right, got a bit of a problem, but dont know what it is.....

when i'm driving and put my foot down, the car chugs and makes a clicking/banging sound, it doesnt sound/feel good! anyone got any ideas what it is?

[liirge]

Right this could be several things,
ensure you are actually firing on 4 cylinders, to do this, start the engine let it idle.. Then remove Number 1 HT lead from sparking plug, and earth it against block, the engine should start to loose revs or nearly stall. Then replace the lead, then move on to the next plug, if one of them doesnt change the revs than you are not firing on four.
i would check your ignition by:
Clean Spark plugs, Check HT leads are firmly on both Plug and Cap and the one from the coil.
Clean contacts on the Dizzy cap, and rotor arm.
If that doesnt solve it,

Write back.

[ycming]

Hmm ... i would suspect that is problem with one of the rockers .. may be take the rocker cover off and see if there is anything unsual ?
IF the above doesn't work.

Ming

[razorsharp192]

Right this could be several things,
ensure you are actually firing on 4 cylinders, to do this, start the engine let it idle.. Then remove Number 1 HT lead from sparking plug, and earth it against block, the engine should start to loose revs or nearly stall. Then replace the lead, then move on to the next plug, if one of them doesnt change the revs than you are not firing on four.
i would check your ignition by:
Clean Spark plugs, Check HT leads are firmly on both Plug and Cap and the one from the coil.
Clean contacts on the Dizzy cap, and rotor arm.
If that doesnt solve it,

Write back.

hi, thanks for the reply, going to do this now, have you got any pics? where's the dizzy cap and rotor arm?! (havent got a clue as you can tell )

[razorsharp192]

right, i've done the spark plug ht lead test, and one of them doesnt change the revs. its not the spark plugs (i swapped 2 around and it still did it).


"Clean contacts on the Dizzy cap, and rotor arm. "

help?! where are the contacts, and where is the rotor arm? how do i do this?

also, if i take the dizzy cap off, how do i know which order the ht leads go back in? is there a diagram anywhere?

Edited by razorsharp192, 28 July 2008 - 12:32 PM.

[razorsharp192]

Hmm ... i would suspect that is problem with one of the rockers .. may be take the rocker cover off and see if there is anything unsual ?
IF the above doesn't work.

Ming

just incase i need to do this if the above doesnt work... when you say "unusual" what would i be looking for?

[liirge]

There is a diagram Somewere, but..
Starting at the dizzy cap plug at about 2:45 going ANTI CLOCKWISE, The plug order is 1342, 1 being closest to the radiator.
The contacts are the metal bits inside the dizzy cap, the ROTOR ARM, is the plastic arm thing, that goes round inside the cap but connected to the Dizzy its self. it has a metal contact on the end of it.
Make sure you clean the HT leads, infact did you swap the HT leads firsts, as it could be a faulty lead, see if swapping the non firing lead, causes the misfire to move.

[liirge]

[razorsharp192]

thanks for the diagram. yeah i tried swapping the leads, and the same one isnt firing, so its not the lead either

does the dizzy just unscrew? is there anything to watch out for when i take it off?

[liirge]

Nothing really to watch for, THere should be to clips on each side of the cap!

[razorsharp192]

right i'll go give it a go!

Edited by razorsharp192, 28 July 2008 - 03:03 PM.

[razorsharp192]

There is a diagram Somewere, but..
Starting at the dizzy cap plug at about 2:45 going ANTI CLOCKWISE, The plug order is 1342, 1 being closest to the radiator.
The contacts are the metal bits inside the dizzy cap, the ROTOR ARM, is the plastic arm thing, that goes round inside the cap but connected to the Dizzy its self. it has a metal contact on the end of it.
Make sure you clean the HT leads, infact did you swap the HT leads firsts, as it could be a faulty lead, see if swapping the non firing lead, causes the misfire to move.

regarding the plug order, 1342, i understand that is the order they go on on the dizzy, but is that also the order they are on the spark plug part (dunno what its called!), or are they just 1234? (or 4321)

[liirge]

1342 is the firing order of the car, so on that diagram, "Number one cylinder" means connect it to number one Spark plug, wich is closest to the radiator. The Spark plugs, go from number 1 at the radiator to number 4 by the clutch housing on the opposite end in ascending order. i.e. 1234

[liirge]

Hope this diagram i made helps

[soooty]

dont clean you points if u dont know what ur doing. you will probably not get them back in properly. ask a garage to do it.

Edited by soooty, 28 July 2008 - 03:39 PM.