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| | | | Joined: Nov 2009 Posts: 119 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2009 Posts: 119 | Hello All -
I recently re-wired the entire truck (6 cylinder / 235). Before re-wiring it ran great. After re-wiring it still runs fine but starts to cough and sputter when I get to the tail end of each gear. In 3rd gear, it might go 40 mph while coughing and sputtering. It just doesn't respond when I try to accelerate. I thought it might be the timing and dwell since I replaced points and condensors. I took the truck to a mechanic and he set the timing and checked dwell. After a few minor adjustments, no really noticable difference...still coughs and sputters at the tail end of each gear. Any ideas? During the re-wiring I replaced the starter, coil, resistor. Your ideas would help tons. Thanks in advance!!
Thom Masterson
| | | | | Joined: Oct 2011 Posts: 172 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2011 Posts: 172 | could be low tension wire breaking down or even a ht/plug or coil lead (king lead) breaking down
have you fitted ,modern, ht leads i.e carbon core type?
or have they got the old type wire core (the best)
it could be one of many things but these are the easiest to check first
hope this is of some help
mike..
live or die do it with spanner in hand
| | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | I assume from your handle that it's a 62, right? Check to see if the coil you installed has an internal resistor in addition to the one you replaced. If so, the primary ignition circuit current will be too low to develop a good spark. The voltage at the + terminal of the coil should be approximately 9.5 volts with the engine running and the charging system voltage at about 14.5 or so. An original-equipment type coil SHOULD NOT have a resistor internally in the primary circuit.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Nov 2009 Posts: 119 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2009 Posts: 119 | Thanks for the replies. No luck as of yet. The mechanic and I have taken your suggestions and still no better. We're scratching our heads over this one.
Thom Masterson
| | | | | Joined: Mar 2009 Posts: 788 'Bolter | | 'Bolter Joined: Mar 2009 Posts: 788 | one could have a fuel delivery problem at higher rpms. fuel pump, dirty filter, screen gummed up in tank-pinched line
ron | | | | | Joined: Aug 2000 Posts: 800 Shop Shark | | Shop Shark Joined: Aug 2000 Posts: 800 | Did you really clean up the grounds and get them tight? Star washers will help and the frame must be ground clean of paint, then you can cover back up with a little grease or petro jelly.
HRL, I thought 12 volt coils came with internal ballast resistors, and 6 volt coils did not. So there are 12 volt coils without resistors? | | |
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