Ignition issue
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Ignition issue
There is a lot of questions from a newbie
Timing set to 14 initial.
When i check timing before the engine gets really hot it is spot on.
But when it gets really hot, the timing mark wanders off, comes and goes, i can barely see it.
Could it be the torsion damper that is the problem??
Timing set to 14 initial.
When i check timing before the engine gets really hot it is spot on.
But when it gets really hot, the timing mark wanders off, comes and goes, i can barely see it.
Could it be the torsion damper that is the problem??
Melting Slicks
Joined: Jan 2014
Posts: 2,478
Likes: 254
From: Downers Grove Illinois
There is a lot of questions from a newbie
Timing set to 14 initial.
When i check timing before the engine gets really hot it is spot on.
But when it gets really hot, the timing mark wanders off, comes and goes, i can barely see it.
Could it be the torsion damper that is the problem??
Timing set to 14 initial.
When i check timing before the engine gets really hot it is spot on.
But when it gets really hot, the timing mark wanders off, comes and goes, i can barely see it.
Could it be the torsion damper that is the problem??
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
Do you have a points style distributor or HEI? If it's HEI the unit may be going bad, and the heat might worsen the problem. If it's a points style unit, it might be the capacitor or the coil that's being affected by the heat.
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
If your damper has over 100,000 miles on it I strongly recommend replacing it with a modern damper from Summit Racing. The new dampers use a type of silicon rubber instead of the natural rubber and they last forever (well, almost forever anyway) and they come with timing marks every 90 degrees for setting valves.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
New Hei and a new coil. Well, the milage is unknown, would not trust the odometer since i do not know the history of the car...
Traced it down to Virginia 1999, but it ends there...
Other than that the car is in grate shape, dispite of history
Traced it down to Virginia 1999, but it ends there...
Other than that the car is in grate shape, dispite of history
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
Is the HEI power lead connected to 12 volts? It can't be the damper causing the timing to fluctuate with heat. Could it be the induction sensor on the timing light? I still think it's the HEI unit.
Burning Brakes
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
what or which parts of the HEI are new? on the HEI distributor, the pickup coil moves and flexes the wires inside, over time, they wires can get damaged internally. that is one area to look at for erratic timing.
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Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
HEI looks like one from Summit, no brandmarkings...
Coil is 2years old.
Voltage to the coil is a bit of a mystery...12,7V when engine is shut off.
At idle it is 11V and when i rev it the voltage goes down to 10,5V?
Tried to feed the coil with an external wire and the idle was still erratic and timing mark off and on....
Will go to autoelectric shop for a check to rule that out, next step after that is the torsion damper. Timing light flashes just fine, don`t think that is the issue.
Coil is 2years old.
Voltage to the coil is a bit of a mystery...12,7V when engine is shut off.
At idle it is 11V and when i rev it the voltage goes down to 10,5V?
Tried to feed the coil with an external wire and the idle was still erratic and timing mark off and on....
Will go to autoelectric shop for a check to rule that out, next step after that is the torsion damper. Timing light flashes just fine, don`t think that is the issue.
Burning Brakes
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
HEI looks like one from Summit, no brandmarkings...
Coil is 2years old.
Voltage to the coil is a bit of a mystery...12,7V when engine is shut off.
At idle it is 11V and when i rev it the voltage goes down to 10,5V?
Tried to feed the coil with an external wire and the idle was still erratic and timing mark off and on....
Will go to autoelectric shop for a check to rule that out, next step after that is the torsion damper. Timing light flashes just fine, don`t think that is the issue.
Coil is 2years old.
Voltage to the coil is a bit of a mystery...12,7V when engine is shut off.
At idle it is 11V and when i rev it the voltage goes down to 10,5V?
Tried to feed the coil with an external wire and the idle was still erratic and timing mark off and on....
Will go to autoelectric shop for a check to rule that out, next step after that is the torsion damper. Timing light flashes just fine, don`t think that is the issue.
here is a good link to checking HEI setups.
http://macsblognotes.blogspot.com/20...on-system.html
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Are you sure you are checking correctly? coil should not be getting voltage at all with engine off...if it was, engine would not shut off.
here is a good link to checking HEI setups.
http://macsblognotes.blogspot.com/20...on-system.html
here is a good link to checking HEI setups.
http://macsblognotes.blogspot.com/20...on-system.html
Yes it does with ignition on..