89 Classic needs help - Page 2 - Land Rover Forums : Land Rover and Range Rover Forum
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post #16 of 19 (permalink) Old 03-16-2019, 06:27 AM
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The next most common issue is the distributor. So get one of these https://www.ebay.com/itm/Vtg-1960-70...wAAOSwUvFciFhN to check that it is set properly and is operating correctly.
The main shaft in the distributor is actually two shafts with the top section rotating on the bottom. The amount of rotation is controlled by spring loaded weights in the bottom part of the distributor that you can't see. The two halves are held together by a plastic clip. Over time that clip becomes brittle. It is easily broken if people pull too hard on the rotor button when changing it. This causes the two halves to seperate and the springs come off the weights. The person who broke it usually just pushes the shaft back down and it looks OK, but it isn't. Your timing will be all over the place without the springs to control it.

Once you get you timing light you will be able to check if it is OK without pulling it apart. You just make sure the timing advances when you rev the motor and returns as you go back to idle.

The Vacuum advance on the distributor is only there for better fuel economy, it will not affect your power. But you can check that it is working with the timing light. Simply disconnect the vacuum advance hose where it connects to the throttle body. With the motor running and your timing light connected, simply suck on the hose to see if the timing advances. It should hold the more advanced timing by simply putting your tongue over the end of the hose once you sucked it up.
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post #17 of 19 (permalink) Old 03-16-2019, 10:54 AM Thread Starter
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Compression test is in

Pass side from firewall to front
98
100
99
110
Drivers side from firewall to front
115
112
110
124
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post #18 of 19 (permalink) Old 03-16-2019, 07:17 PM
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Quote:
Originally Posted by Gerk View Post
Compression test is in

Pass side from firewall to front
98
100
99
110
Drivers side from firewall to front
115
112
110
124
Compression tests do not mean a lot. They can vary considerably for no good reason. A vacuum gauge will tell you a lot more about the state of the motor.
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post #19 of 19 (permalink) Old 03-20-2019, 03:05 PM
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Go back to basics. Check fuel pressure at regulator. You’ll have to pull hose and t in a pressure gauge. Harbor freight do a nice kit. Check pressure. When under load it may not deliver volume. You can get a Chevy cavalier pump asst and install. You have to drain and drop tank in that model.
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