New Cam, Heads & Carb: Backfires Does Not Run

[pontiacgp]

are you sure the distributor itself isn't the problem?....if you have another distributor that you know is good I'd try that. Plus I'm sure your aware that cam has to be broken in properly or it'll be ruined.

 

[86 Grand prix]

If I'm not mistaken you do install the distributor on a SBC with the marks dot to dot. You have to turn the crank 180 and then drop in the distributor.

When you put the cam in, did you make sure to put the cam and crank sprocket dot to dot? I've forget to do that in the past.

 

[jrm81bu]

If I'm not mistaken you do install the distributor on a SBC with the marks dot to dot. You have to turn the crank 180 and then drop in the distributor.

When you put the cam in, did you make sure to put the cam and crank sprocket dot to dot? I've forget to do that in the past.

Make that "turn the crank 360 degrees", then drop the distributor in. When you line them up dot-to-dot, the number one cylinder is at tdc on the exhaust stroke. One full rotation of the crank will put it at tdc on the compression stroke, which is where you want it to be when you drop the distributor in.

 

[86 Grand prix]

If I'm not mistaken you do install the distributor on a SBC with the marks dot to dot. You have to turn the crank 180 and then drop in the distributor.

When you put the cam in, did you make sure to put the cam and crank sprocket dot to dot? I've forget to do that in the past.

Make that "turn the crank 360 degrees", then drop the distributor in. When you line them up dot-to-dot, the number one cylinder is at tdc on the exhaust stroke. One full rotation of the crank will put it at tdc on the compression stroke, which is where you want it to be when you drop the distributor in.

That is correct, the top gear timing mark should be straight up when the distributor is installed.

 

[xcookpac]

Reinstalled distributor so that I have enough room to time it properly (without having vacuum canister get hung up). Reset static timing. Then checked static timing with timing light while motor spins with starter. All fixed. Thanks for everyone's help.