Busted 8N

[jaxs]

My current thinking is a possible vacuum leak in the intake manifold.

The quick and dirty method of checking for vaccum leak is spraying starting fluid through a straw around manifold to see if engine change's. Set a fire extinguisher where it's handy before you begin. Regarding timeing,are you aware that TDC come's up TWICE,(once to compress and fire then again to exhust) on each combustion cycle? You might try pulling distrubitor then restabbing 180 degrees.

 

[cruz54982]

motownbrown has a point - will not hurt anything just switching the 2 offenders if you know what 2 they are just to see .

 

[cruz54982]

just read jaxs's post could be distributor off as he says - we had that exact thing on a rebuilt engine when we got it back after rebuilt

 

[Tractorable]

The quick and dirty method of checking for vaccum leak is spraying starting fluid through a straw around manifold to see if engine change's. Set a fire extinguisher where it's handy before you begin. Regarding timeing,are you aware that TDC come's up TWICE,(once to compress and fire then again to exhust) on each combustion cycle? You might try pulling distrubitor then restabbing 180 degrees.

Good point, except I used a "plug whistle" which whistles on the compression stroke to confirm that it is on the correct up stroke of the piston.

Cool Plug whistle: Innovative Products of America 7894 Flexible Compression Whistle Amazon.com: Innovative Products of America 7894 Flexible Compression Whistle: Automotive

 

[Tractorable]

motownbrown has a point - will not hurt anything just switching the 2 offenders if you know what 2 they are just to see .

I will try that when I get to the tractor next. Thanks

 

[Tractorable]

The quick and dirty method of checking for vaccum leak is spraying starting fluid through a straw around manifold to see if engine change's. Set a fire extinguisher where it's handy before you begin. Regarding timeing,are you aware that TDC come's up TWICE,(once to compress and fire then again to exhust) on each combustion cycle? You might try pulling distrubitor then restabbing 180 degrees.

I have new manifold and head gaskets coming in the mail. The whole manifold is only held on with four nuts on studs. I'll replace the gasket and check for cracks in the manifold when I have it off. Hopefully no need for a fire extinguisher haha.

 

[cruz54982]

when you find the problem please post it - thanks in advance

 

[Tractorable]

when you find the problem please post it - thanks in advance

Will do, I figure once I find out what the problem is and fix it I will have replaced everything that can be replaced on a flat head Ford and I should be good for a long while, and learned a lot about my tractor in the process, knock on wood.

 

[AWSubie]

Have you replaced the ignition switch? After time the switch can start acting intermittently. It will test "good" with a static continuity test but then during operation cut out intermittently. You can bypass the switch altogether by disconnecting from the leads and directly connecting the wires together and then starting the tractor to see if things improve.

 

[windy acers]

I HAD SOME PROBLEMS WITH ENGINE PERFORMANCE ON A 9N.AFTER REBUILDING AND STILL THE SAME. I DISCOVERED IT HAD A AFTER MARKET COIL AND THE RESISTER TO THE COIL WAS JUMPED. REPLACED WITH FORD PARTS AND IT RAN WELL. DOES THE COIL MATCH THE 6 OR 12 VOLT BATTERY? NEG. OR POSITIVE GROUND?