Ignition problem...I think
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Ignition problem...I think
Ok need to bounce some things off you guys.Had my Re-powered 1990 502/Bravo out this Saturday and my motor started popping and shut down. Cranked and trying to restart it was popping bad out the carb. Put it on the trailer got it home did some checking Sunday and found the it seem to be coming from the right bank only. Pulled the plugs did find that #4’s ground electrode was bent close to the center electrode. No evidents that any thing hit it. Did a compression check all is good. Will be doing a leak down tonight (tool at work). Pulled valve cover nothing bent or miss adjusted. I am thinking that the Ignition module took a dump and is advancing on it own. (Merc. Thunderbolt). Any other thoughs?
Last edited by Mike Paula; 08-07-2006 at 01:53 PM.
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Re: Ignition problem...I think
New cam in rebuild? Check for flat exhaust cam lobe/pushrod/rocker problem too. Wont necessarily show up as compression or leakdown problem but will have the symptoms you described.
Also check the spark plug wires are correct.
Gary
Also check the spark plug wires are correct.
Gary
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Re: Ignition problem...I think
A bent ground electrode is a bad sign. Usually means something bouncing around the combustion chamber hit it. Either some thing went down the carburater or something broke off. If it's popping, I'd look for a piece of a valve. Do a leak down test.
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Re: Ignition problem...I think
Check the basics, is the distributor tight and is the timing correct? base and full.
Check cap, rotor and wires and firing order.
What plugs did you go with?
Could also be water in the fuel.
Check cap, rotor and wires and firing order.
What plugs did you go with?
Could also be water in the fuel.
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Re: Ignition problem...I think
Originally Posted by PatriYacht
A bent ground electrode is a bad sign. Usually means something bouncing around the combustion chamber hit it. Either some thing went down the carburater or something broke off. If it's popping, I'd look for a piece of a valve. Do a leak down test.
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Re: Ignition problem...I think
Could be the module, but I don't think so. I would check the distributor cap and rotor, rotor alignment, distributor shaft and drive gear.
Dave
Dave
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Re: Ignition problem...I think
Don't forget to check the ground wire coming from the ingition module. They can break at the spade connector or up in the plug to the module. Give it a yank to make sure it is solid.
BT
BT
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Re: Ignition problem...I think
Originally Posted by Dave_N
Could be the module, but I don't think so. I would check the distributor cap and rotor, rotor alignment, distributor shaft and drive gear.
Dave
Dave
Motors is out a getting flushed as we speak.