compression
360 still won't start!
Junior User
Joined: Oct 2002
Posts: 82
Likes: 0
From: Pacific Northwest
IMHO I would try a few other things which are easy. If you have another (what is original carb?) carb I would try it. Also make sure your filter is not clogged. Might want to see if your coil is OK too. I've had spark but coil has been off ... I've heard it can change polarity too. Also water if fuel can be problem.
Hope you can get it to fire.
Hope you can get it to fire.
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Senior User
Joined: Dec 2003
Posts: 330
Likes: 0
From: Newhall,CA
Is there a way to check if the coil is ok? I have a brand new clear fram filter and gas is squirting perfectly. Does anyone have a second opinion on putting the other lifters back in before I tear my engine back apart?
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Senior User
Joined: Dec 2003
Posts: 330
Likes: 0
From: Newhall,CA
Yeah... the lifters all rusted anyway. I'll just keep on brainstorming. I'll check the compression once Ii get a new battery 
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Logistics Pro
Joined: Feb 2000
Posts: 3,565
Likes: 9
From: Sun River St. George
Take out the spark plugs. Charge up ther battery. Take the coil wire from the distributor cap and hold it about 1/2 inch from a clean metal source. Turn the engine over with the starter. You should see and hear a blue spark jump to the metal. This spark should snap loudly. Yellow weak spark? Replace the points or pickup in the distributor if you have an electronic ignition. Take off the distributor cap. Turn the engine over with the starter. Does the rotor move? Take off the rocker covers. Turn the engine over using the starter. Do the rockers go up and down? Disconnect the accelerator return spring. Prop the throttel valve all the way open (like you floor the accelerator). Take a compression test on all eight, three strokes per, write down what the results. Bump the engine over using the starter until the vibration damper TDC mark is under the timing pointer and both valves for number 1 are closed. Can you rotate the pushrods for number one with your fingers? Is the distributor rotor pointing towards number one spark plug lug on the distributor cap? Please post back!!!
Senior User
Joined: Sep 1999
Posts: 176
Likes: 0
From: Minneapolis
Not a compression problem
You don't have a compression problem. Even with very poor compression, your engine will fire. Granted it may not have a lot of power, and it may be pushing blue smoke out the tailpipe, but it will run. You have a problem with ignition or the valvetrain.
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Senior User
Joined: Dec 2003
Posts: 330
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From: Newhall,CA
I charged up the battery and checked the spark from the coil and as far as I could tell it was good. I checked my compression on one side and all four were at around 90 psi. That's low right? 
Postmaster
Joined: Nov 2002
Posts: 3,447
Likes: 1
From: Littleton, CO
That could be considered low, but still enough for the motor to run. When you pulled the plugs were they wet? Seems to me you may not be getting enough spark to the plugs, if any. What distributor do you have, the points or the electronic? When you crank the motor without the cap on, is the rotor turning correctly? Did you check the gap on the points?
--Mike
--Mike
Senior User
Joined: Mar 2004
Posts: 283
Likes: 1
From: brookings, sd
i had the same problem w/ one of my engines. it would just about want to fire, but never would and just backfire. it turned out to be the pickup coil (stator) in the distributor. that is if you have electronic ignition.