I've been setting up the timing on my 67 mustang for a bit now because even when I set it, it seems the timing jumps on me.
The Carburetor is perfectly tuned. Idles great. New intake manifold gasket, distributor is an all electric conversion.
Now I'll set it to 6 adv. initial with the car warmed up at idle, vacuum advance line clogged & unplugged from the carb.
And it sat perfectly at 6 adv for a good 10 to 15 minutes.
Start it up this morning. Now I'm at 8 adv? I unplug the vaccuum advance and clog it again. Just to make sure the vacuum advance didn't quickly kick in and advance me to 8.. And it's still sitting at 8 after snapping the throttle back a few times to see if the vaccuum advance would eventually give in. Now my car is sitting at a solid 8 degress advance.
Is this normal and I'm just stupid or is my distributor drive gear or cam drive gear taking a **** on me?
2007-06-26 08:38:07 · 6 answers · asked by dannydevito380 2 in Cars & Transportation ➔ Maintenance & Repairs
you probably need to shim the distributor shaft for end play..
try setting it again.
.the timing chain / gear,
is the only other thing that will do this
2007-06-26 08:47:12 · answer #1 · answered by dumbo 3 · 0⤊ 0⤋
No there is something wrong, if you have a computer in the car it could be resetting the timing itself for the best startup and fuel use; 67 should not have a computer in it, how ever. Unless you put one in! Stop the engine plug the vacuum line then restart the engine, it should be back on 6, or you have a wear problem. This could be the timing gear, belt, wear in the distributor shaft, or the new electronics kicking in and resetting the whole package to what it thinks is wright.
2007-06-26 15:52:04 · answer #2 · answered by zipper 7 · 0⤊ 0⤋
You didn't say whether or not the engine was warmed up the same as when you set the timing.Is it possible that the choke was still on a little and the rpms were higher than before? A 200 or 300 difference in rpm could advance the timing 2 degrees. Also remove the distributor cap and check for sticking centrifugal advance weights.
2007-06-26 16:07:23 · answer #3 · answered by Ron B 6 · 1⤊ 0⤋
You got it.
checking the cam gear would be my first move.
Worn loose timing chain can caues this.Unfortunately it is not a simple job.
So break out the tool box and good luck.
2007-06-26 15:44:33 · answer #4 · answered by Anonymous · 0⤊ 0⤋
check your electric distributor conversion it may be faulty on the more complicated end its the timing gears.
2007-06-26 15:47:46 · answer #5 · answered by arc7499 3 · 0⤊ 0⤋
sounds to me like you have a motor with lots of miles timing chain or timing has wear on it time to spend some money on the old motor !!!
2007-06-26 15:52:47 · answer #6 · answered by garret 2 · 1⤊ 0⤋