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Operation: Busted Knuckles

Started by brentsydlik, June 18, 2011, 08:21:36 PM

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brentsydlik

#45
December 16, 2011, 10:16:52 PM
ive tried all the small vacuum ports on the carb... never had  any prob before with the stock dist.

GRONK

#46
December 17, 2011, 09:27:11 AM
Small port from carb could be manifold vac, could be ported vac.  Your HEI will also have a 10-19deg swing.  Might neeed to adjust the advance curve.  My guess is impropper vac source to dist and possible incorrect timing.
"Bucket" 1983 Limited Wagon
"Tootie" 1984 Wagon
Owner - GRONK Performance

brentsydlik

#47
December 17, 2011, 03:35:30 PM
timed at 8degrees, when i hook up the vac that only applies as throttle is applied it goes to about 15 dgrees at 1500 rpms or so and then skips time and dies.

brentsydlik

#48
December 18, 2011, 02:12:21 PM
totally disregarding the timing advance issue... what would cause it to run great in park and miss under load...

mudkicker715

#49
December 18, 2011, 04:04:16 PM
What's the plug gap at.



Manitowoc WI

brentsydlik

#50
December 18, 2011, 11:13:31 PM
45 thousanths but i think i may have figured it out... the 4 screws that hold the coil in the cap were over tightened and cracked through the bottom exposing them to the rotor... all 4 have burn markings on them so i will have to prucure another cap tomorrow.

brentsydlik

#51
December 20, 2011, 07:01:03 AM
bought a new cap and installed it. Smoothed out alot. i can actually drive it now. But #3 and #4 both have an intermittant miss. i have no idea why. Just using the timing light on the each of the wires and pointing it at the ground i can watch the 3rd and 4th cylinders just lose fire and miss. all the rest of them fire nice and steady.

68AMXGOPAC

#52
December 20, 2011, 07:52:14 AM
Good trick with the timeing light, I have used that before.

AMCKen

#53
December 20, 2011, 04:36:37 PM
Partially remove the wire from the bad plug and hold it a short distance away from the plug so the spark has to jump a gap to reach the plug. I had 2 plugs on my J20 that were bad and the extra resistance of jumping the gap helped them fire. Fresh plugs fixed them.
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94Sentra2dsd   (42)

brentsydlik

#54
December 22, 2011, 06:42:06 PM
tried that... no use
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