Engine cranks very slow.
Thread Starter
|
5th Wheeling
Joined: Jun 2013
Posts: 39
Likes: 0
Engine cranks very slow.
Ok, I have a problem starting my 272 it will pause just at the start of a compression stroke.<o
></o
I have set the timing chain and sprockets, 12 pins between timing marks. Engine turns over very easy without the plugs, as soon as I put one plugin the engine will pause on that cylinder. If I put all of the plugs in it cranks very slow and will barely turn over. <o></o
Any ideas?<o></o
></oI have set the timing chain and sprockets, 12 pins between timing marks. Engine turns over very easy without the plugs, as soon as I put one plugin the engine will pause on that cylinder. If I put all of the plugs in it cranks very slow and will barely turn over. <o
></oAny ideas?<o
></o
Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
Too much initial advance. Back off the timing a bit and see if it improves.
Unless you know that the damper is good, you cannot rely on it to set the timing. Over time, the damping mass can move and the timing marks are on that mass. The fix is a new or rebuilt damper.
Unless you know that the damper is good, you cannot rely on it to set the timing. Over time, the damping mass can move and the timing marks are on that mass. The fix is a new or rebuilt damper.
Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
Trending Topics
Thread Starter
|
5th Wheeling
Joined: Jun 2013
Posts: 39
Likes: 0
Wouldn't the engine need to be running to change the advance? It will not start because it will not turn over fast enough to start.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
You can still loosen the distributor and adjust. Once it runs, go back and set it where it needs to be if you can.
Another thing, The marks on the gears were at the 3 o'clock position when viewed from the front of the motor (pointing to the oil pump side of the motor), correct? Some books illustrate this incorrectly which results in incorrectly installed gears.
Another thing, The marks on the gears were at the 3 o'clock position when viewed from the front of the motor (pointing to the oil pump side of the motor), correct? Some books illustrate this incorrectly which results in incorrectly installed gears.
Thread Starter
|
5th Wheeling
Joined: Jun 2013
Posts: 39
Likes: 0
Yes, I have set the timing marks @ 3 o'clock with 12 pins between the two marks. It's got to be the strangest thing I have come across. When I remove all of the plugs it turns over great. For a example, I will remove all of the plugs except #1 cylinder and then turn the engine over, it will pause at #1 cylinder. This same thing happens on all cylinders it will pause on the cylinder that has the plug. It acts like there is to much compression. When the piston just starts it's move up to TDC it will Pause.
Logistics Pro
Joined: Mar 2005
Posts: 3,771
Likes: 80
From: tujunga, calif
If you aren't familiar with changing the timing advance setting just remove the coil wire from the coil to the distributor, that will illuminate the question of it possibly being to far advanced. If it spins freely it's a timing issue, if it remains the same the problem is else where.
A little more info would help.
You didn't say if this is a new motor or an old one that you just replaced the timing chain?
Did it turn over normally before working on it?
A little more info would help.
You didn't say if this is a new motor or an old one that you just replaced the timing chain?
Did it turn over normally before working on it?
Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
Do what hiball says, first. That will rule it out.
To adjust the timing, loosen the distributor clamp bolt and turn the distributor. I believe it is counter clockwise to retard the timing. Make very small changes until it turns over and starts. You won't have to move it a whole lot to put it too far in the other direction, where the opposite will happen - it turns over very easily but still doesn't start.
If that doesn't work, there are other ways to determine the approximate relation of the distributor to the crank without relying on the timing marks if you are unsure of the damper's condition.
However, if it ran before the timing chain replacement and the distributor was not moved, it should be close to where it needs to be. Did it run?
To adjust the timing, loosen the distributor clamp bolt and turn the distributor. I believe it is counter clockwise to retard the timing. Make very small changes until it turns over and starts. You won't have to move it a whole lot to put it too far in the other direction, where the opposite will happen - it turns over very easily but still doesn't start.
If that doesn't work, there are other ways to determine the approximate relation of the distributor to the crank without relying on the timing marks if you are unsure of the damper's condition.
However, if it ran before the timing chain replacement and the distributor was not moved, it should be close to where it needs to be. Did it run?
Thread Starter
|
5th Wheeling
Joined: Jun 2013
Posts: 39
Likes: 0
This is good info. The engine ran a few years back, I have been restoring the PU, Frame up. When I tried to start it the first time I ended up with this problem.
I will try this today and let you know the out come.
Thanks
I will try this today and let you know the out come.
Thanks