vacuum disconnect and timing
02-22-2010, 04:57 PM
#1
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vacuum disconnect and timing
When I unplugged the vaccuum lines from the distributor the timing didnt change it stayed at 8 the same when the lines are connected. Shouldnt the timing drop when the lines are disconnected?
02-23-2010, 05:39 PM
#2
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I would think so but just to see try revving the engine while shooting the light at it (Be sure to watch for moving parts!!), if the mark doesn't move then something is surely wrong.
02-24-2010, 08:56 PM
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The front vacuum line on the distributor, nearest to the grille, is the vacuum advance. This is the one that you want to remove in order to time the vehicle.
The rear line, which may or may not have a check valve and a "T" for a high altitude compensator, stays connected during during ignition timing.
For an 80-85 22-R, I believe that ignition timing should be 5deg BTDC at 800 RPM's, on a warm motor, but you should double check the FSM.
The rear line, which may or may not have a check valve and a "T" for a high altitude compensator, stays connected during during ignition timing.
For an 80-85 22-R, I believe that ignition timing should be 5deg BTDC at 800 RPM's, on a warm motor, but you should double check the FSM.
02-24-2010, 09:22 PM
#4
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Check to make sure both diaphrams hold vacuum by using a vacuum pump or just sucking on the hoses to see if they hold. I have rarely seen a used one where both diaphrams actually hold vacuum.
Pumpkinyota is correct that the one nearest the grille is the main advance, but the inner one is pulled at idle (and at high altitudes if you have the HAC system). This one also needs to be disconnected when doing the timing.
Pumpkinyota is correct that the one nearest the grille is the main advance, but the inner one is pulled at idle (and at high altitudes if you have the HAC system). This one also needs to be disconnected when doing the timing.
02-26-2010, 06:40 AM
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Hi I have a question relating to this topic. when I recently put in my new distributor we set the engine to tdc and made sure the rotor was pointing to the #1 wire and it seems to run good, what is my timing set at? 0? is this bad or should I change it using a light?? thanks
02-26-2010, 09:59 AM
#6
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It is best to set it using a light. The rotor pointing at the #1 wire gets it close enough to run, but usually not perfect. If you do not have a light, advance it a little at a time until it starts to ping then back it off a little.
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02-26-2010, 02:08 PM
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As stated earlier...
Also, you can search for "Factory Service Manual" on this forum, and download the FSM for just about any Toyota ever. Follow the instructions in the FSM, and you will be good to go!
The front vacuum line on the distributor, nearest to the grille, is the vacuum advance. This is the one that you want to remove in order to time the vehicle.
The rear line, which may or may not have a check valve and a "T" for a high altitude compensator, stays connected during during ignition timing.
For an 80-85 22-R, I believe that ignition timing should be 5deg BTDC at 800 RPM's, on a warm motor, but you should double check the FSM.
The rear line, which may or may not have a check valve and a "T" for a high altitude compensator, stays connected during during ignition timing.
For an 80-85 22-R, I believe that ignition timing should be 5deg BTDC at 800 RPM's, on a warm motor, but you should double check the FSM.
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