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Old 12-13-2018, 09:32 PM   #1
ALmotoman
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Default 1948 Super Deluxe Ignition (?) Woes

Have been a member for many months, but have been lurking rather than posting. Recently my '48 Super Deluxe has been extremely hard to start, but it will usually, eventually start, and idle and run like a Swiss watch. Of late the engine has additionally started dying out at stop lights, and even while motoring down the road. When that happens, I pull over and it cranks right up. I'm currently running a Pertronics Ignitor electronic ignition with upgraded, modern plug wires and a stock coil. Today I received a Pertronics low resistance 0.6 ohm Flame-Thrower II coil that I plan to install as soon as the mounting bracket arrives. I think it makes sense to run the electronic ignition with the matching coil. A few things that I've done troubleshooting this problem are replaced the battery and solenoid, and rebuilt the starter, carburetor and fuel pump. If this new high power coil doesn't cure the ill, then I'm up the creek and out of ideas. I am obviously open to any and all comments, theories, idea, etcs. Of course I'm assuming that this is an ignition problem and not a fuel problem. These symptoms were present when I was running the stock dual points and doesn't seem to be as a result of going with the high tech ignition system. Thanks for listening.....love the forum.
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Old 12-13-2018, 09:39 PM   #2
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Weak fuel pump? Based on what you said, it's probably not an ignition problem
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Old 12-13-2018, 10:44 PM   #3
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Quote:
Originally Posted by ALmotoman View Post
Have been a member for many months, but have been lurking rather than posting. Recently my '48 Super Deluxe has been extremely hard to start, but it will usually, eventually start, and idle and run like a Swiss watch. Of late the engine has additionally started dying out at stop lights, and even while motoring down the road. When that happens, I pull over and it cranks right up. I'm currently running a Pertronics Ignitor electronic ignition with upgraded, modern plug wires and a stock coil. Today I received a Pertronics low resistance 0.6 ohm Flame-Thrower II coil that I plan to install as soon as the mounting bracket arrives. I think it makes sense to run the electronic ignition with the matching coil. A few things that I've done troubleshooting this problem are replaced the battery and solenoid, and rebuilt the starter, carburetor and fuel pump. If this new high power coil doesn't cure the ill, then I'm up the creek and out of ideas. I am obviously open to any and all comments, theories, idea, etcs. Of course I'm assuming that this is an ignition problem and not a fuel problem. These symptoms were present when I was running the stock dual points and doesn't seem to be as a result of going with the high tech ignition system. Thanks for listening.....love the forum.
Umm, replacing a bunch of parts without knowing the cause of the problem is not troubleshooting, it is guessing. Hope you saved all the good parts you replaced.

Hard to start could be timing or fuel. Has the distributor been timed since converting to pertronics? Timing too retarded would cause hard start and overheating. Carb been rebuilt by an expert? Good flow of fuel while cranking? What coil resistance is recommended with your pertronics setup? You sure it is 0.6 ohms? Thought they needed 1.5 ohms. Both my flatheads are pertronics and start and run flawlessly. Crab distributors though. Timing can be roughly checked easily. Hold thumb on #1 spark plug hole and crank motor over until you get compression, then look in cylinder until top dead center. Then take off cap and see how close rotor is pointing to #1. Timing really should be done on a distributor machine.
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Last edited by mrtexas; 12-13-2018 at 11:05 PM.
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Old 12-13-2018, 10:59 PM   #4
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Ground cable to firewall connection??
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Old 12-13-2018, 11:12 PM   #5
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Fuel pump was rebuilt with new parts. Piston rocker arm was out of position, locked up and bent, and that was replaced. I have taken the fuel line from pump to carb off and cranked the engine, and the pump will fill a jar. Also, the fuel in the carb float bowl remains full. Seems to me the engine is getting fuel.
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Old 12-13-2018, 11:28 PM   #6
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Default Re: 1948 Super Deluxe Ignition (?) Woes

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"90% of fuel system problems are caused by the ignition system, while 90% of ignition system problems are caused by the fuel system". As "mrtexas" says, try a little diagnosis of the problem before throwing parts at it; that only complicates the diagnosis procedure.
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Old 12-13-2018, 11:42 PM   #7
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Distributor has not been timed since converting to electronic ignition. Carb was not rebuild by an expert, just a hobbyist. Yes, good flow of fuel while cranking. Coil resistance as recommended by Pertronics is 0.6 ohm. Thanks for the tip to ballpark check the timing. I have spoken to Michael at Third Gen Automotive about having the timing checked on a distributor Sun machine.
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Old 12-13-2018, 11:43 PM   #8
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Ground cable to firewall connection worth checking again. Thanks.
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Old 12-13-2018, 11:45 PM   #9
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Old 12-14-2018, 01:45 PM   #10
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Default Re: 1948 Super Deluxe Ignition (?) Woes

'Umm, replacing a bunch of parts without knowing the cause of the problem is not troubleshooting, it is guessing. Hope you saved all the good parts you replaced.'

"90% of fuel system problems are caused by the ignition system, while 90% of ignition system problems are caused by the fuel system". As "mrtexas" says, try a little diagnosis of the problem before throwing parts at it; that only complicates the diagnosis procedure."

Whoa guys.....give me a break. I probably shouldn't have used the word "troubleshoot." Parts that I have replaced germane to my ignition (?), fuel (?) problem in the year and a half that I've owned the car are the things that I mentioned. Battery died, so I replaced it; solenoid died, so I replaced it (twice); starter died, so I had it rebuilt; carb power valve failed, so I rebuilt the carb while I was at it; fuel pump failed, so I rebuilt it; replaced the inline fuel filter, installed suppression core spark plug wires, etc. I plead guilty to replacing failed parts to keep the car running.
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Old 12-14-2018, 06:04 PM   #11
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Default Re: 1948 Super Deluxe Ignition (?) Woes

"A few things that I've done troubleshooting this problem are replaced the battery and solenoid, and rebuilt the starter, carburetor and fuel pump. If this new high power coil doesn't cure the ill, then I'm up the creek and out of ideas. I am obviously open to any and all comments, theories, idea, etcs. Of course I'm assuming that this is an ignition problem and not a fuel problem."

Keep in mind that folks can only respond to what is posted and providing help over the internet without even being able to see the vehicle is not a simple one answer process. If you follow some of these post it can sometimes end up being something that was not included in the original post! It is a process, you know the vehicle and what has been or not been done to it and how it is behaving. All we have is what is posted. It normally gets worked out, but it takes a bit sometimes.
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Old 12-14-2018, 06:18 PM   #12
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Default Re: 1948 Super Deluxe Ignition (?) Woes

12 volt or 6 pos or neg earth , gas cap still vented ? How are you getting power to the Pertronix ? Body to frame grounded , and you may have mentioned this , is it the orig motor ?
Float level correct , what kind of needle ? Are you adding MMO ?
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Old 12-14-2018, 10:38 PM   #13
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Ignition switches on old Fords often give trouble due to wear of internal contacts. To prove a point just fit a little jumper wire across the switch terminals and go for a drive. Regards, Kevin.
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Old 12-15-2018, 09:19 AM   #14
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Default Re: 1948 Super Deluxe Ignition (?) Woes

It's sad that they don't make decent replacements for the ignition systems. Most folks on the board use the original stuff as much as possible. When they work and work well, the stock system lasts for years and especially with upgrades like a rebuilt original coil. I'm not a fan of Pertronics stuff or suppression wires. They just don't seem to be any more reliable than the old stuff.
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Old 12-15-2018, 10:30 AM   #15
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Default Re: 1948 Super Deluxe Ignition (?) Woes

I would suggest using the Bosch blue coil ( assumining its 12 volt) #00012 or the Bosch # 00016 for six volt...


pm sent ..........
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Old 12-15-2018, 10:59 AM   #16
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Default Re: 1948 Super Deluxe Ignition (?) Woes

I think replacing the coil makes sense.
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Old 12-15-2018, 03:04 PM   #17
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Quote:
Originally Posted by BUBBAS IGNITION View Post
I would suggest using the Bosch blue coil ( assumining its 12 volt) #00012 or the Bosch # 00016 for six volt...


pm sent ..........
Bubba does that 6v bosch coil have an inbuilt resistor?

thanks
GB
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Old 12-16-2018, 06:05 AM   #18
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Default Re: 1948 Super Deluxe Ignition (?) Woes

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Originally Posted by BUBBAS IGNITION View Post
I would suggest using the Bosch blue coil ( assumining its 12 volt) #00012 or the Bosch # 00016 for six volt...
Jim, in past threads on this topic, you've suggested the NAPA IC12SB coil, which says it requires an external resistor. Their IC14SB has an internal resistor. Which is best to use with the Pertronix 1285LS 12 volt unit?

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Old 12-16-2018, 10:03 AM   #19
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Default Re: 1948 Super Deluxe Ignition (?) Woes

By their nature, a coil is similar to a resistor. Both have wire windings and have a resistance value to them. The number of windings is what gives it the resistance factor on the primary side. There is no extra resistor inside a coil. Electronic ignitions require different specifications in the primary resistance than the battery ignition systems for the most part. If they recommend a specific primary resistance value of coil then that is the only one that will work well with that comopany's electronic module. To use the wrong coil would fry the electronic module in most cases.
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Old 12-26-2018, 09:30 PM   #20
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Out of town and away from the car over the holidays. Before leaving, I revisited the fuel pump and found the cap on the rocker that engages the piston broken into two pieces and supposedly impairing the fuel pump's operation. Replaced this part with a spare. No change to the hard starting problem. Installed a new, hotter Pertronics Flame Thrower II coil. No change to the hard starting problem. Will get back on this around Jan 7th.
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Old 12-27-2018, 02:04 PM   #21
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Grounding, grounding, grounding. It's the cheapest and easiest thing you can do. Battery to frame. body to frame, and engine to body. Make sure the starter has a good ground to the motor. If the starter was rebuilt and then painted, the paint on the end of the starter may not be allowing the starter to make a good ground to the motor. Do this before you go any further. Also make sure you have the correct size battery cables.
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Old 02-07-2019, 11:55 PM   #22
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Back from the holidays for several weeks now and working on the Ford to fix the hard starting and engine dying out problems. I decided to remove the Pertronics electronic ignition module and coil (even though they checked out fine) and save them for a rainy day, and go back to the original points and coil setup. I boxed up my distributor, carburetor, fuel pump and coil and sent them to Third Gen Automotive for inspection, repair or replacement. Got them back in a week’s time!. The coil and fuel pump checked out fine. The distributor was machined and received points, timing set and condenser. The carb base had several issues (hole on the inside of the base in one of the barrel shafts, hole in the outside and worn throttle shaft bushings) and was rebuilt. Put all the parts back on the car and no go. Discovered that majority of new sparkplug wires were not firing. Checked wires for continuity and they were fine. Used two different distributor caps and neither worked. Me thinks the distributors are not of the best quality and that the rabbit ear distributor cap is a horrible design. The wires enter the distributor cap and then have to be bent some 135 degrees in the opposite direction to affix to the cap. That, plus an extremely small area to work in, make the task practically impossible. I have ordered a replacement 1942 crab type distributor, rotor and wires, which makes a lot more sense to me. As soon as they arrive, I expect to be up and running. Thanks so much for all of the help in all of the posts. More later.
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Old 02-08-2019, 09:49 AM   #23
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Al, not sure if it's been mentioned above, but I found my '47 liked solid core ignition wires a lot better than the suppression ones, but I'm still 6 volts positive ground. Even with my crab...rebuilt and timed by Jim Linder....I still had a miss under constant highway speed. Changed the wires and that fixed it!!!


You have been at this for a while now and I can empathize with your frustration!!!


Best of luck in fixing this!!!
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Old 02-08-2019, 11:27 AM   #24
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Just a little bit on almost the same problem on my 50 cpe just shut off go to the side of road crank a little and away we go had it die in driveway great got out my test light no power at coil wiggle the wire had power on off found that the copper wire had broken inside of plastic cover at the coil terminal soldered new terminal on no problem since every time engine would shake would make and break circuit hope this helps anyone
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Old 02-08-2019, 08:56 PM   #25
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Default Re: 1948 Super Deluxe Ignition (?) Woes

I had a problem with my Pertronix-equipped '48. It would not re-start after the initial couple of start, re-starts after the motor was rebuilt. Crab distributor was Bubba-checked as was matching Pertronix coil. I had someone that knows way more than me come over to help diagnose the problem. He saw a small spot inside the rotor and another on the outside where he suspected the spark was shorting against the distributor shaft before reaching the end of the rotor to fire the plugs (see pictures). I would have never seen those marks. He said he had seen the same thing on a Mazda engine that challenged him in the past.

I took the ballast resistor out of the circuit (per Pertronix) and replaced the cap and rotor with USA-made NAPA parts. It instantly fired right up. Seems to be fine now.
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Old 02-23-2019, 04:14 PM   #26
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Default Re: 1948 Super Deluxe Ignition (?) Woes

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Recently I installed the carburetor, distributor, crab style distributor cap, rotor and wires, all rebuilt and or new, from Third Generation Automotive. And alas, I now have a good starting ’48 Ford that will continue running until I turn the key off. Hallelujah! I’m back in business!

A few days ago on a trip to east Tennessee, I stopped by Third Generation Automotive to meet Michael Driskell in person and to see his shop. He is a remarkable young man.….extremely knowledgeable and helpful. His shop is huge and I’ve never seen so many early Ford parts. He sells, repairs and rebuilds parts, engines, transmissions, differentials, etc., and does restorations. He has a huge eBay Store online parts business and is the current President of the almost 8,000 member national Early Ford V8 Club. Not to mention he is married and a parent. He is one busy guy.

I wish to thank Third Generation Automotive for all of their work on and help with my failed parts, and all the Ford Barn forum members that posted for their advice and help. I’m back on the road now and lovin’ it!
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Old 02-23-2019, 06:22 PM   #27
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Default Re: 1948 Super Deluxe Ignition (?) Woes

Another coil thought. The Flamethrower II coil is 45,000 volts. That is borderline too high for inside of a crab distributor. It can jump the spark to the wrong place. That can cause the random run, miss, die, restart phenomenon. The plain flamethrower is 40,000 volts. That is what I have been running into my 12v Pertronix, with no problems. I carry the Bosh blue as a spare.
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