Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello. It sounds like the balancer is bad or inaccurate for the engine. Can you give me some backstory on what was done to the engine before this happened ?
Ok , so why did you replace the balancer ? Because of this ? How did this occur ? New engine ? And where is your number 1 plug located at ? And are you sure you have the correct number one cylinder with your timing light ?
That could very well be , that's why I asked more info on the engine
I suggest removing the spark plug for cylinder 1. Insert a long stick or 1/4" extension and crank the engine by hand until the extension stops moving to truly fint tdc and then see where the timing mark is at.
Hey man I am just trying to help you out. Why it would need to be 40 advanced to run we both know ain't right. I will opt out and see if another expert can help. I'm not sure where to go from here. My apologies. Lou
new expert here
a few questions for you when set to 40 degree's the engine will idle good and drive and perform just fine and shut off without dieseling and crank right back up no problem ? no pinging ?
starts rough like the timing is too far advanced ?
and when set to 0 it will not run at all ?
it really bothers me you need it at 40 degrees for it to run
the balancer is correct and the distributor is set in correctly
are you 100 % sure the valve are adjusted correctly ? ( i just want to be sure we are not compensating with the timing for an issue like tight valves )
what type distributor are you running ?
double check the valves if they are good do you have any access to a basic HEI distributor you can put in this engine and see if it will run when set at 0 degrees ?
you have tried another distributor and it will run at 0 and allow you to set the timing and it will start up ?
it is either defective or somehow is retarding the timing when it should not be as you need to advance that one 40 degrees for it to run
is it tricked out somehow ? brand new ? used ?
i would try to switch out a basic HEI and see what it does before you pull the timing cover
if its fine with the HEI the distributor is the problem
if it still does the same thing and the valve's are adjusted correctly then the chain has to be off then pull the cover and see if it has a cam sprocket with different marks on it v/s the stock marks
if so either change it back to a stock double roller or try to set this one back to stock marks
you can always get me back through this post for FREE anytime with any follow up with this question anytime even after you rate us here at Justanswer !
40 degrees does not lie correct you don't have to agree or disagree with the theory at all either way
bot***** *****ne is this engine needs 40 degrees for it to run either physically or from the distributor itself
is it actually needing 40 degrees to run or is the distributor itself doing this ? we do not know
try another distributor to be sure
you are in the process of eliminating things at this point
if an HEI put in the engine and it does the same thing then pull the timing cover
at this point with an HEI only running best at 40 degree's you need to pull the timing cover and see if the timing chain is set degree'd or not
lets see if any other experts have any ideas
another expert will reply back to you
is this a timing light that has the adjustment dial on it to measure advance?
How did you set the distributor in?
I think you are a tooth off.
60 degrees at idle? There is only 180 degrees total and if you divide that by 8 for each cylinder that only leaves 22.5 degrees before the spark from the rotor would be jumping to the next distributor cap tower. That is why I asked you how you set the distributor in?
Try it this way. Remove the distributor. Turn the engine over and find when the #1 piston is coming up on tdc compression stroke again, then set the timing mark on the damper and timing mark at 0. Then set the distributor down in until it meshes with the cam gear and note where the #1 is on the cap and point it toward either the #1 cylinder like I like to do or point it straight forward like some other people like to do, then pull the distributor back out until the gear is free from the camshaft gear, so you can now turn the distributor until the rotor now faces just before where #1 was on the cap. Remember as you drop the distributor in the rotor will move as the gears mesh so it may take a few times. Then reach down and turn the oil pump with either a screwdriver or a special tool so the distributor can be dropped in exactly where you want it.
Then once the oil pump is turned the distributor will drop completely in and the rotor will be facing #1 and also the armature will be ready to fire also. Most people forget that last step.
Here is what I am talking about.
Then static time the engine in order to get it started then time it with the timing light.
To static time,
First of all you will need a test plug.
Get the #1 piston up on TDC on its compression stroke and align up with the timing mark, whatever base timing should be. Now remove the distributor cap and make sure the rotor is facing toward or at least close to #1 tower on the cap. Put cap back on. Make a test plug and remove the spark plug wire from #1 spark plug and insert the test plug into the end of the wire and ground the clip. Loosen the distributor hold-down bolt just enough so you can turn the distributor by hand. Now turn the ignition key to run, watch the test spark plug and quickly turn the distributor back and forth across where the rotor was facing #1 on the cap tower and look for a spark. Once you find where it sparks, stop. Tighten down the distributor a little, start the engine then time the engine.
You can make a test plug with a new spark plug and some wire, a mini hose clamp and an alligator clip. First open the spark plug gap to around 0.075” and strip both ends of a 16 gauge wire about 4 foot in length. Attach the mini hose clamp around the threads of the spark plug cause that is a ground and secure it with the mini hose clamp with the bare wire end in between to make a good connection. Next, take the other end of wire and secure to an alligator clip.
Now, you have a test plug. Remove any spark plug boot you want and insert your test plug onto the spark plug wire end you just pulled off and ground the alligator clip. Lay the spark plug in some shade somewhere under that hood and then crank the engine and look for spark. It should crackle with sound and should be blue but red is ok, orange is a little weak. If it can jump that 0.075” gap you should have no problem igniting an engine.
There, that should do it.
What makes no sense, that the distributor can be in wrong?
I asked you how you set it in and you didn't answer.
I assumed then you didn't know how to set one in properly.
When you removed the one distributor and set the other one in, I know it didn't just drop right in. You had to turn the oil pump.
I asked you how you dropped it in.
Ok, let's try another question.
I don't recall you ever saying what year this engine was
Is there a vacuum advance? If so, do you have the vacuum line going to ported or non-ported vacuum?
In other words, is there vacuum advance at idle or not? If not, try vacuum advance at idle so you can set the base timing back some.
If this isn't the case, I still think you need to either set the distributor down in correctly or at least tell me exactly how you did set it down so I know not to suspect that anymore.
Yes, I read all of those other conversations.
Here is what I think is going on. You are a tooth off on setting the distributor in and what this is causing is the rotor may be facing #1 but the armature isn't facing where it is firing, so it is so far advanced it is firing at the next tower on the cap.
6 inches of vacuum where? At the intake manifold?
6 inches is really low.
Hook up the vacuum advance for the distributor to vacuum advance at idle.
No vacuum advance? So this has a computer?
Is this fuel injected? What year is this engine or at least close to what year?
try this. Move all of the spark plug wires on the cap one turn retarded and see what the timing mark is at now when it idles the best.