Hi.
I just completed rebuilding the distributor on the fully-smogged 2f in my 82 FJ40. In doing so, I determined the governor weights were binding up on old sludge/grease that lubricates the weights where they move along the signal rotor.
Other addressed issues:
1. The Dist. also had the classic missing stop-pin bushing; I replaced the missing bushing as well.
2. The ball-bearings in the breaker plate were all gummed up, causing the plate to bind when attempting to be moved by the vacuum advance arm. I cleaned it out with PB Blaster, and it's mostly good; some intermittent small binding can be felt at times, when manually moving the breaker plate. I'm assuming this issue is properly addressed (?)
3. Using my hand vacuum pump and applying vacuum to the advance canister, the vacuum arm does indeed fully retract by the time ~10mmHg is applied. However, I'm expecting that the vacuum should hold, but it doesn't, and the arm will extent back to its resting position unless I continuously feed it vacuum via pumping the hand pump.
Question: is this what is defined as a leaky vacuum canister that is often mentioned in the forums? In my forum research, I have not found a definition for what are the actual symptoms of a leaky canister. FSM does not give any description of bad canister symptoms, rather it only mentions checking if applied vacuum will actuate the arm.
I'll mention that the above rebuild has cured the too-advanced issues in my truck, and has greatly improved low end power and torque, through ~2200 RPM. However, above that RPM range, power and torque are mostlly flat, sprinkled with a few very subtle power stabs as it moves above ~2200RPM; the engine just feels somewhat starved in these higher RPM bands. This truck is the only reference point I have for 2F performance, so I don't know if this is working as intended, or if perhaps is a symptom of a leaky vacuum advance canister.
Other notes: idle advance is set to 10* BTDC (because JimC. always seems in the forums to suggest it), manifold idle is steady at 20mmHg, and it has a fully rebuilt fuel, ignition, and smog system.
Any description of leaky canister is greatly appreciated, as well as any other comments/suggestions.
Thanks!
I just completed rebuilding the distributor on the fully-smogged 2f in my 82 FJ40. In doing so, I determined the governor weights were binding up on old sludge/grease that lubricates the weights where they move along the signal rotor.
Other addressed issues:
1. The Dist. also had the classic missing stop-pin bushing; I replaced the missing bushing as well.
2. The ball-bearings in the breaker plate were all gummed up, causing the plate to bind when attempting to be moved by the vacuum advance arm. I cleaned it out with PB Blaster, and it's mostly good; some intermittent small binding can be felt at times, when manually moving the breaker plate. I'm assuming this issue is properly addressed (?)
3. Using my hand vacuum pump and applying vacuum to the advance canister, the vacuum arm does indeed fully retract by the time ~10mmHg is applied. However, I'm expecting that the vacuum should hold, but it doesn't, and the arm will extent back to its resting position unless I continuously feed it vacuum via pumping the hand pump.
Question: is this what is defined as a leaky vacuum canister that is often mentioned in the forums? In my forum research, I have not found a definition for what are the actual symptoms of a leaky canister. FSM does not give any description of bad canister symptoms, rather it only mentions checking if applied vacuum will actuate the arm.
I'll mention that the above rebuild has cured the too-advanced issues in my truck, and has greatly improved low end power and torque, through ~2200 RPM. However, above that RPM range, power and torque are mostlly flat, sprinkled with a few very subtle power stabs as it moves above ~2200RPM; the engine just feels somewhat starved in these higher RPM bands. This truck is the only reference point I have for 2F performance, so I don't know if this is working as intended, or if perhaps is a symptom of a leaky vacuum advance canister.
Other notes: idle advance is set to 10* BTDC (because JimC. always seems in the forums to suggest it), manifold idle is steady at 20mmHg, and it has a fully rebuilt fuel, ignition, and smog system.
Any description of leaky canister is greatly appreciated, as well as any other comments/suggestions.
Thanks!