9 replies to this topic

[panch1989]

As above 79 clubman turbo running a metro engine with a hif44 turbo carb. Freshly rebuilt carb fitted and was running before the carb came off. Any ideas?

[Carlos W]

Pour a thimble full of fuel down the carb, then try to start it. If it starts you've got a fuel problem.

 

Float sticking closed possibly?

[dklawson]

As above, start with the thimble of fuel test to confirm that the non-start issue is related to the carb and not something else.

 

You rebuilt the carb.  Did you set the float valve height proplerly, make the initial re-start jet adjustments, insure the piston was free to move, re-plumb the carb properly when re-installing it, connect or cap all the connection points on the outside of the carb, fit new manifold gaskets and make sure everything is seated, properly connect and adjust the throttle and choke linkages?

[panch1989]

Float height is 1mm off the level in the centre. Jet adjustment is level with the bridge then two turns in to it. All connections are plugged correctly, New gaskets, sitting like it did before and the linkages look correct.

[panch1989]

This is how the linkages looks

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[Minimoke8394]

Are the plugs dry when you take them out? Can you smell fuel in the cylinders? Getting a spark? Cars can do odd things as we all know. Take a step back and test what you'd normally test if you hadn't just rebuilt the carb.

[panch1989]

I checked all the spark plugs all getting spark. Now I need to recharge the battery as I've almost killed it.

[panch1989]

When I go to turn the key over its kind of sounding like a backfire but won't fully ignite. I'm baffled as to what it could be. I've checked points, timing, float level and its moving freely. It's got a spark and now battery power. Also has fuel. I'm stuck

[Carlos W]

Check the leads are on in the correct order

[dklawson]

When I go to turn the key over its kind of sounding like a backfire but won't fully ignite. I'm baffled as to what it could be. I've checked points, timing, float level and its moving freely. It's got a spark and now battery power. Also has fuel. I'm stuck

 

Backfire out the carb or the tailpipe?

 

If you did not touch the timing, you have rebuilt the carb, and the backfire is out of the carb, look for fuel supply issues.  The quick sanity check is to dump a thimble of fuel down the carb throat and try to start the engine.  If it fires briefly then promptly dies, you have a fuel delivery problem.