Timing
Timing
- Thread starter allowell
- Start date
elwood blues
Always Off-Roading Jeeper
- Posts
- 6,023
- Media
- 71
- Solutions
- 1
- Thanks
- 49
- Location
- Export, PA
- Vehicle(s)
- 1978 CJ7 4.2L Comp Cam & valve train, MC2100 carb, MSD ignition, Dana 30 front, T18 trans, Dana 20 txfr, AMC 20 rear.
6 degrees before top dead center (BTDC).
IOPort51
NOT the voice of reason Jeep-CJ.com
- Posts
- 13,959
- Media
- 458
- Thanks
- 11
- Location
- Garland Texas
- Vehicle(s)
- 1977 cj-5
4.2 W/MC2100 carb, 4.0 head W/3 angle valves,SS Header,TFI ignition with MSB-6 offroad module,CS144 140 amp RPS alternator with remote regulator T-150,d-20,Dana 44 with OX lock and disk brakes. D-30 with Spartin locker,
skyjacker 2.5 lift?nitro shocks,31" BFG A/T off road.8000 lb Warn winch, original owner.=^)
2006 Toyota Tacoma
this is a much harder question than I would have thought , The factory service manual tells you to check the emissions label in the engine compartment, I am guessing you no longer have one. Haynes is only giving the timing up to 79 in a book that is supposed to be good up to 89. For what it is worth the timing on a 79 AMC 258 i6 / 4.2l two barrel with manual Transmission is 6-8 degrees BTDC and the auto is 8-10 BTDC. I am pretty sure I am running my 81 J-10 AMC 258 i6 / 4.2l manual two barrel at about 8degrees BTDC.
mtruckstuff
Jeeper
8 BTDC at sea level, add about a degree for every 1000 ft above that. Nebraska is probably somewhere around 1500-2000 ft depending where you're at.
allowell
Jeeper
Thanks guys, you wouldnt believe how far off it was, cant believe it was running. Exlpains the loss of power. I still have a wobble at 35-45mph under load, it goes away when coasting. It feels like a miss and doesnt appear to be in the drivetrain. Basically developed this overnight?
mtruckstuff
Jeeper
Maybe the hold down wasn't tight. In any case, glad to hear you solved your problem.
Paul
Paul