This thing is pointless
KenB
Senior Jeeper
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- Location
- Kenefick, TX
- Vehicle(s)
- 81 CJ7, 258 I6, D30, D300, D20, TF6 Auto, 95 YJ Rio Grande, 2.5L, AX5, 02 Dodge 2500 Diesel, 09 Prius (hers)
OK, help an old guy get up to date. I've made a few changes:
Exhaust - removed cat, increased to 1 7/8" pipe, hi-flow muffler
Carb - Replaced pre-electronic BBD with MC2100
Removed some of the emissions stuff that was no longer hooked up, and plugged ports/hoses.
After the exhaust work, I noticed a "marbles in a tin can" rattle when accelerating under load (can't hear it no-load), and suspected timing.
Set timing to 8 BTDC at 700 rpm. That reduced the rattle, but didn't eliminate it. Some time passes and I can't tinker with it for awhile, but get to do a little studying. One thing I find (that I should have remembered) is to set the dwell before the timing. Hooked up the dwell meter, and it's reading a solid, steady 48. Hmm, specs for the engine say 31-34. Okay, I need to adjust the points. Popped the distributor cap (Motorcraft) - NO POINTS!!
So now I'm confused. How do I adjust dwell - or do I need to?
Is there something else I should be looking for to eliminate the pinging? (The vacuum advance seems to working i.e. it moves if I suck on the hose, but no idea how much vacuum that is. I have read that there may be an adjustment in the vacuum advance canister, but haven't tried that yet. If it is in there, have no clue as to how much adjustment to make.)
Sorry to be so long winded, but I don't know where to go from here.
Exhaust - removed cat, increased to 1 7/8" pipe, hi-flow muffler
Carb - Replaced pre-electronic BBD with MC2100
Removed some of the emissions stuff that was no longer hooked up, and plugged ports/hoses.
After the exhaust work, I noticed a "marbles in a tin can" rattle when accelerating under load (can't hear it no-load), and suspected timing.
Set timing to 8 BTDC at 700 rpm. That reduced the rattle, but didn't eliminate it. Some time passes and I can't tinker with it for awhile, but get to do a little studying. One thing I find (that I should have remembered) is to set the dwell before the timing. Hooked up the dwell meter, and it's reading a solid, steady 48. Hmm, specs for the engine say 31-34. Okay, I need to adjust the points. Popped the distributor cap (Motorcraft) - NO POINTS!!
So now I'm confused. How do I adjust dwell - or do I need to?
Is there something else I should be looking for to eliminate the pinging? (The vacuum advance seems to working i.e. it moves if I suck on the hose, but no idea how much vacuum that is. I have read that there may be an adjustment in the vacuum advance canister, but haven't tried that yet. If it is in there, have no clue as to how much adjustment to make.)
Sorry to be so long winded, but I don't know where to go from here.