Wont Time!

[Bronk351]

Well i installed a new 351W in my 95 Bronco. I have everything right, and i went to time it for the first time, spout connecter disconnected, timing light inductive clamp on number 1 cylinder, and i found 10* BTC and marked it with a black paint marker. Started it up while the truck was at normal operating temps, set the distributer to the mark, and it idles really low and almost stalls so i move the distributer back to where i had it.

Ive heard of another person i know have the same problem, so he has it timed by ear and feel. Thats how my truck has been for the first 1000 miles and i dont feel right about it. At times it gets some pretty rich starts.

Also i installed my original harmonic balancer (didnt want to) but at the time i wanted to get the truck running again. It had 81K miles on it total when my motor swallowed some water.. This balancer had some cracks in the rubber.. Anyone have an idea or can lead me in the right direction?

 

[miesk5]

Well i installed a new 351W in my 95 Bronco. I have everything right, and i went to time it for the first time, spout connecter disconnected, timing light inductive clamp on number 1 cylinder, and i found 10* BTC and marked it with a black paint marker. Started it up while the truck was at normal operating temps, set the distributer to the mark, and it idles really low and almost stalls so i move the distributer back to where i had it.
Ive heard of another person i know have the same problem, so he has it timed by ear and feel. Thats how my truck has been for the first 1000 miles and i dont feel right about it. At times it gets some pretty rich starts.

Also i installed my original harmonic balancer (didnt want to) but at the time i wanted to get the truck running again. It had 81K miles on it total when my motor swallowed some water.. This balancer had some cracks in the rubber.. Anyone have an idea or can lead me in the right direction?

Do you think the balancer cracks have physically "drifted" the timing marks?

aside frm this, for my curiosity, I can't ecall if the 351 is externally or internally balanced.. so, did the engine come w/a balancer and you used the old balancer? or it didn't come w/a balancer?

 

[Bronk351]

Im thinking something like that is throwing it off.

Motor came without a balancer. I had to reuse my old one.

 

[miesk5]

Im thinking something like that is throwing it off.
Motor came without a balancer. I had to reuse my old one.

ok

I was trying to visualize this & went bonkers..and by the way I was typing, I knew I needed to take some blood press. meds..

so, thinking the timing is actually ********.. running rich at times (or abnormal higher temps, etc.?)...right? -

well tried to think if the bal cracks throws the marks off... what would happen?...I thought it would go to ********* but wouldn't it make it more advanced (any pingig or signs of adv timing?)?

Still am a little bonkers. What do you think?

 

[Bronk351]

I think your just outright crazy! /emoticons/[email protected] 2x" width="20" height="20" />

Sorry to be so confusing, just erase that i said anything about the balancer being cracked and throwing the timing off. Makes no sense.

As for the timing, What could possible make it so you cant set it to 10 BTC without the motor running like crap? Distributer being a tooth off? Im going to try timing to 10 tomorrow to refresh why it wouldnt run.

When a truck pings, what does it sound like? A Ting coming out of the tailpipe at an idle?

 

[Yardape]

Sounds like a knock in the engine, you were on the right track with the balancer, the outer ring can actually slip on the rubber throwing you timing out

 

[Yardape]

Are you sure your using the correct 10 degree marking. Try setting it at the other one see what happens

 

[Bronk351]

Naa not a knock in the engine. My old engine did the same kind of ting. The old one pinged taking off which was really annoying, this one is a nice deep grunt, (No cats and 40 series flowmaster).

So a balancer can do something like that? Maby il go get a new balancer tomorrow...

 

[Big_Ford_POS]

Ping is spark knock and it is common when you have a load and high rpms. It sounds like quiet little backfires. Like popping and you can tell its coming from the motor. If it ping at idle then you are really advanced. Your plugs are firing well before the piston isreaching the top if its stroke. Keep in mind that 10 degrees is small you have 360 degrees to a circle and 180 degrees from the bottom of the cylinder to the top and the top being 0. Nifty huh... DTC = 0 degrees. Food for thought. The spark plug is suppose to fire 10 degrees BEFORE top dead center that way the the priston compresses the exploded air and as it rolls over center it springs or is pushed down. Be sure you are not 10 degrees ahead but 10 BTDC Before Top Dead Center. Now your distrubutor isn't off a tooth or you wouldn't have been able to get it to 10 degrees. I put mine in a tooth off and got to 4 degrees before it was turn all the way against the accessory bracket. Be sure also that if you have a timming gun that is adjust able, you set the gun to 10 degrees and the time to the 0 or DTC mark. I've seen guy do that to a corvette. He set the gun on 7 degrees and time it to 7 degrees and what he got was 14 degrees if timing and a crappy running engine. I can't recall how the engine sounded though... ummmmh... nope can't remember. He realized it after we had a couple more beers and he called it a few more names. Uh well, good luck....

 

[Yardape]

turn your engine over by hand till the balancer reads TDC, pull your dizz cap off and see where the rotor is pointing. I am trying to remember, seems a bit foggy but I think the rotor should point to number 1 cylinder.

 

[Bronk351]

My timing gun has the dial on the back for advancing. So i mark the 0 on my harmonic balancer, and move the dial to 10. That should get me to 10 is what your saying right? Ive done this and it didnt work.

 

[Bronk351]

Yea the distributer should point at the number 1 cylinder marked on the cap. Not directly at the cylinder.

 

[Big_Ford_POS]

Good thats right 10 on the gun and 0 mark on the balancer. $60 for a balancer (at least a 302, 351 shouldn't be much different) and i guess see what you got. Really it all is electronic controlled so it should either run or not... <_< ????