![]() ![]() If the timing light fails to operate or operates erratically, refer to TROUBLESHOOTING to determine the most likely cause of the problem.Īdvance timing test procedures vary widely from vehicle to vehicle. These controls include:ĭepending on make and model, a vehicle may be equipped with a single timing control device, or two or more devices may be used in combination. DO NOT ATTEMPT TO ADJUST ENGINE TIMING WITHOUT THE MANUFACTURER'S PROCEDURES OR SPECIFICATIONS.Īdvance and retard timing controls ensure that ignition occurs at the proper time during the compression stroke. Refer to your vehicle's service manual for the proper procedures to adjust engine timing. BE SURE to reconnect any vacuum hoses, etc., which were disconnected during the timing check. Turn the ignition off and disconnect the timing light from the engine. Replacement or timing adjustment MAY BE necessary. If the readings are not within the manufacturer's specifications, parts If the readings are within the specified tolerance (typically See Figure 4.Ĭompare the readings obtained in step 7 with the manufacturer's specifications for timing. Note the position of the rotating timing mark in relation to the reference pointer. ![]() Press the Zeroing Switch if necessary to obtain 0 degree indication.Īdjust the timing light barrel, as needed, to adequately light the timing marks. MAKE SURE the timing light Advance Display shows 0 (zero) degrees. After this test I will not worry about the digital light giving me false readings.Start and run the engine until it reaches its normal operating temperature.Īdjust the engine's idle speed, if necessary, to conform to manufacturer's specifications: I wanted to verify that my timing settings were what I thought they were. I had only used the digital light on this motor. After reading this thread I was worried that the newer digital light might be giving me some false readings. The only reason I conducted this test was to prove to that my timing settings were correct. The MSD box did not give any problems with either light used. I did the tests back to back several times and had no differences between either light. I got exactly the same readings with this light. It has no dial back capabilities just a straight up timing light. Second timing light old sears analog inductive light that I bought back in 1982. I could use the dial back to set the pointer at 0* and rev the motor to any rpm with steady readings. The timing was spot on at 18* with a total of 36* all in at 2800 rpm. All timing readings were done with the vaccum advance unhooked and plugged.įirst timing light is an Equus Innova 3568 digital timing light with tach and digital dial back capabilities. I have the springs set up so timing is all in by 2800 rpm. I have the vacuum advance hooked up to ported vacuum. I have my initial timing set at 18* with the 18* mechanical advance bushing installed for a total of 36*. I have a B&B timing pointer that was indexed at TDC when the motor was built. ![]() The ignition system is an MSD 6AL box with an MSD Pro Billet 8361 distributor. So today I decided to conduct an experiment with the two timing lights that I have.įirst off I have a 70 chevelle with a 383 motor. I have been following this thread with some interest. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |