Red Spark?
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Mountain Pass
Joined: Feb 2014
Posts: 159
Likes: 3
Red Spark?
I have 65 352/sb 2wd 3 on the tree
Was looking this weekend at the end of the spark plug wire
spark is red not blue?
What do you guys think?
It has a new coil on it? Think it is not grounded correctly?
Thanks
Sonny
Was looking this weekend at the end of the spark plug wire
spark is red not blue?
What do you guys think?
It has a new coil on it? Think it is not grounded correctly?
Thanks
Sonny
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Could be. Want to see a blue/white spark at the plug that snaps loud in the air. Poor grounds and corroded connections are the rule with these old beasts unless you've made some serious efforts otherwise.
More Turbo
Joined: Oct 2009
Posts: 708
Likes: 28
From: Pahrump, Nv.
Usually an orange or red spark indicates a weak coil. You say it's a new coil. Check voltage at the coil. How are the plugs burning, normal? I think Tedster is correct. Check your grounds, Tie everything together Cab to ground, frame to ground, engine to ground.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Everything in those days took a kind of circuitous path in the wiring, today lots of relays keep the voltage close to where it needs to be.
GOOD grounding at the engine block, firewall, and frame is important. Then the block connectors at the firewall will be all corroded as well. Notice the path the wiring takes from the battery all the way to the ignition switch and then back out to the solenoid. New starter cables and ground straps really help, because at the exact moment the starter is sucking down 250 amps, there won't be any "left over" for the ignition if cables are loose, missing, corroded, etc. Ford didn't exactly go overboard on cable size either. Here's the last cable I replaced in my 64, the positive starter cable to solenoid. It got munched somewhere along the way. If your cables are original they will not be much better.
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