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Thread: 86 g63b issues

  1. #1

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    1986 Dodge Ram 50
    Engine

    G63B

    86 g63b issues

    Hey guys , I inherited a 86 colt vista g63b SOHC carb manual trans 4x4 ( I know not a sweet little pickup ) but having a hard time finding info on on replacement parts . Thought you guys may have some insight on these motors . Not many people out there restoring vistas lol. Sat for 10 + yrs with bad head gasket . 33k original miles . I Replaced gaskets, machined head , new timing belt , water pump , tensioners . Rebuilt carb flushed tank and replaced fuel lines . All vacuum lines checked and replaced if needed . Got it all timed/tuned up and running good . The problem - runs great then looses spark once warm / hot . After cool down restarts/ runs good until heat returns. It dies like running out of fuel but fuel pressures all check out . When it is in a no start/ hot state I have no signal coming from distributor to condenser ? On the coil . Tested with test light cranking over Motor w clutch in . Icm in distributor ? Local parts stores can’t find replacement distributor and replacement icm is 208 bucks( and it doesn’t look right compared to the one in my distributor) . Any ideas where to get good aftermarket distributor ? Am I completely confused as to what’s going on with this thing ? I feel like I’m close but still missing something. Never been to savy with electric systems. Thanks

  2. #2

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    Adelaide, South Australia
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    1985 Mitsubishi L200
    Engine

    G63B
    Ok as a general rule of thumb - look at the coil and/or the ballast resistor for problems. It's exhibiting classic symptoms of a dead coil pack or the ballast resistor ceramic body has cracked. It'll start fine when cold and run ok - until it heats up (and the ballast resistor will get HOT if it's failed - a quick touch by hand when the engine has died will tell you straight up) Won't start for 10 -15 minutes. Then rinse and repeat. A coil really should be replaced every 10 - 15 years max and I'd buy a replacement with the ballast resistor integrated into it as to kill 2 birds with one stone so to speak.
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  3. #3

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    Thx geez I’ll go check it out

  4. #4

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    1986 Dodge Ram 50
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    Ok , replaced coil and ballast resistor . Ran smoother and longer than before but still same symptoms. Started to sputter out in third gear pulling a pretty good hill . Not lugged but at the top of gear in pretty good rpm ? Any more ideas??? Thanks

  5. #5

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    1986 Dodge Ram 50
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    K , changed coil , ballast resistor . Ran smoother and longer than normal ... but same symptoms are still present . Started to sputter out on a pretty good pull in third gear at hi rpm . Died and would not start for 10 min . Limped her home and back to square one . Any more insight ¿¿ thanks

  6. #6

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    Hmm. Fuel pressure checks ok. Carb rebuilt. Still think it's an ignition problem though due to the other related symptoms. The ICM should be readily available on ebay and at a reasonable price. Complete reman'd distributors can be had for $70ish USD. Look up the equivalent part # for the ICM on ebay and I guarantee it'll be a heap cheaper than the price you've been quoted.
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  7. #7

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    1986 Dodge Ram 50
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    Sorry for the late response, holidays over and back to the vista . Think I’m going with a new / reman distributor. Any brands known to be good or junk ?

  8. #8

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    93101, CA
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    1986 Dodge Ram 50
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    so any news? It's been since 2019.

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