Holley Carb Problem

[Warren]

Hi Alan

Can't attach piccys in PMs so here is what I found. Just didn't want to dig around not knowing what I might disturb.

Will fire up tomorrow and hopefully that will be that,

Thanks again, Warren

[Clarkson]

Originally Posted by Warren

Hi Alan

Can't attach piccys in PMs so here is what I found. Just didn't want to dig around not knowing what I might disturb.

Will fire up tomorrow and hopefully that will be that,

Thanks again, Warren

That's whats caused it!

[Warren]

Cheers David, you're a great help

[Clarkson]

Originally Posted by Warren

Cheers David, you're a great help

Warren, the top of the carb looks like it needs a good clean,clean out the airbleeds too.

[Warren]

David

Airbleeds ?

Are you just trying to stress me out.................I need pictures, took me years to find the G spot, why did they hide it there for f***s sake

W

[Clarkson]

Warren the air bleeds are next to the shooters front and rear barrels,I can see them in your pic. They are very small jets.

[conrod]

Having seen the muck on the secondary side I've suggested Warren takes the carb off so he can give the whole thing a thorough clean with carb cleaner.

Warren - the best way to clean the jets and bleeds is to squirt them with carb cleaner (aerosols available at any car accessory shop). Never try to clean jets by inserting wire, otherwise you'll scratch or expand them and impact the jetting.

[conrod]

Originally Posted by Warren

Hi Alan

Can't attach piccys in PMs so here is what I found. Just didn't want to dig around not knowing what I might disturb.

Will fire up tomorrow and hopefully that will be that,

Thanks again, Warren

Warren,

Glad you found the cause. I suggest you fit an inline fuel filter just before the carb to stop any other gunge entering the fuel bowls.

[Warren]

Thanks to all, everything cleaned up, I now have a missfire,b&&&&ks!

Right hand bank, no air leaks, sprayed carb cleaner all round, that's how I found inlet leak before. I have had a spark plug failure before and suspect another dodgy plug. Got bored today and stuffed it back in the garage.

Was ticking over luverly until it reached operating temp, good oil pressure and sat there ages in the sun whilst I was looking for the cause of the misfire.

Warren

[mikey]

Originally Posted by Warren

Thanks to all, everything cleaned up, I now have a missfire,b&&&&ks!

Right hand bank, no air leaks, sprayed carb cleaner all round, that's how I found inlet leak before. I have had a spark plug failure before and suspect another dodgy plug. Got bored today and stuffed it back in the garage.

Was ticking over luverly until it reached operating temp, good oil pressure and sat there ages in the sun whilst I was looking for the cause of the misfire.

Warren

Do you mean misfire or backfire i.e. not igniting mixture or igniting in exhaust.

If it is the former try pulling off each of the plug leads (with insulated plyers or whatever) and listen for the change in note to isolate which cylinder. A good trick if you find the faulty plug is to hold the cap just away from the plug electrode so that it arcs accross on tickover. The increased temp sometimes cleans a plug.

If it is the latter it could be weak mixture or timing. You can often tell which cylinder it is by holding your hand just above the header. the cylinder that is misfiring will feel cooler if it is bad and if it is a late burn due to late ignition it will feel much hotter and sometimes glow red if really bad.


Mike

Mike