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Ignition Timing 454timing 454
Posted 19 November 2011 - 05:52 PM
94' P30 454, books say to Identify timing setting by referring to code plate on firewall, well there is no plate, have looked everywhere.
Spoke with RV repair facility and they said they set timing without disconnecting the secret wire that is to be disconnected before setting timing. Degree so far has been 6-8, so I was shooting for 7 and road test and set by ear.
But to get back to that reference I need to identify what wire should be disconnected while setting. If I knew what sensor this wire goes to I could trace it to the terminal. I know I asked a few questions. Please help.
Posted 19 November 2011 - 06:22 PM
Doesn't a 94 454 have a computer? If so, can't you reprogram it to the timing you desire. Its been a long time since I heard the term "Timing by ear". I know that we used to time the old Ford Falcon 6 cylinder by ear since the Harmonic Balancer would shift on the rubber and move the timing mark. Loosen the bolt just a hair and drive, stop tap the vacuum advance and drive some more. Of course there were point and condensor too.
Check with the Mfg. of your coach, they may be able to tell you where the code is or where the wire is.
Herman & Bobbie Mullins
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40 ft 400 HP ISL
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Rally in The Pasture
Posted 07 December 2011 - 10:03 PM
Posted 08 December 2011 - 06:30 PM
With today's motors you will never hear the ping because the accelerometer screwed into the motor has better hearing than you and will retard it before you hear it. So what happens is you keep advancing the ignition until you get to a point that the computer gives up then you will damage the motor. This secret wire I believe is the wire that runs to this accelerometer on the side of the engine block usually located down by the oil pan about midway back on the passenger side.
Take that plug off and now you should be able to time it by ear. Take that wire off that sensor then find a hill and if an automatic tranny accelarate lightly up the hill in third gear and listen for the valve knock. The engine needs to be at operating temps. If no knock then turn the distributor in the opposite direction of the rotation of the rotor just a small amount and try it again until you get spome valve clatter or pinging then back off on the distributor just a little until it goes away.
2004 Monaco Signature Conquest 44', Detroit Series 60
Posted 06 February 2012 - 12:02 PM
The setting should be 4deg. before TDC. Forgot to mention that one needs to remove the Vacuum line going to the vacuum advance on the distributor or the timing will not set correctly. Remove and plug this line. My Bad !!! Edited 5/26/12
The timing should be the same for all big blocks 392-502.
I always checked the timing mark / setting before I moved distributor, always good to have a reference point.
Check the vacuum line to the distributor for leaks and that the counter weights are free to move under the cap.
Posted 16 December 2012 - 09:25 PM
Posted 17 December 2012 - 07:14 AM
When timing the engine from the bottom marker ---3. Motor homes chassis with the timing pointer on the bottom, Bottom left side of engine looking from the front. This procedure works better with two people to set the distributor.
This requires using the #5 or #8 plug wire to trigger the time light. Check the timing mark first before setting timing, using both plugs to check the timing before proceeding.
Plug numbering Left (Drivers side) 1,3,5 and 7, Right side 2,4,6, and 8
The # 1 plug wire is used to set timing when using the top marker reference.
Taken from my post--
454 Engine Ignition Information-- Expanded
Hope this helps. Rich.
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