Dead on 2 and 4
I had some errands to run and a kitchen faucet to put in for the wife, my payment for having her help me work on the car (turn the key ). That helped to take my mind off of the car for a minute and now that I'm a little less frustrated I want to thank you guys for jumping in so quick.
This is a magnum 5.9 engine that I built 5 years ago, 3 years ago I had a head gasket blow between 1-3 on that head in question, but it was on the odd bank at that time. Now that head is on the even bank so 1-3 has moved to 6-8, and the problem now is on 2-4.
Heads are heavily ported factory 2001 casting, floors have been raised with epoxy (thinking I should pull the manifold and check that it has not come loose)
manifold is the speedmaster air gap copy, also heavily ported with floors raised by welding.
Carb is Street demon 750.
Ignition is large cap HEI with pertronics module.
Since the last head gasket change, motor has run strong for 3 years until 3 weeks ago. I went on a little joyride, aerosolized a little bit of rubber off my tires, then made a 40 mile round trip to the hardware store. About 3 miles from the house I noticed it was running really rough and tried to die at the stop sign near the house. I pull into the garage and pop the hood, pulled spark plug wires with it running to check for dead cylinders and found that two and four make no change when I pull the wires. I then hit the tubes with a spray bottle of water and found them to be very much colder than the rest. I then inspected the distributor cap and found that it was loose because two of the hooks came undone. While I was pulling wires, a couple of them became damaged because they are older so I replaced them with brand new wires, cleaned all of the spark plugs, inspected to the contacts in the cap and found them to be clean so I put it back on and made sure it was on correctly this time securely with the hooks, and I still have two dead cylinders. As I mentioned, I still have yet to do the leak down test but compression is perfect. I did the compression test with all spark plugs out of the engine so it would not build pressure between cylinders in the event the gasket is blown out between two of them. In all of this, I never had the intake or a carburetor apart and it was running flawlessly until it wasn't.
I had some errands to run and a kitchen faucet to put in for the wife, my payment for having her help me work on the car (turn the key ). That helped to take my mind off of the car for a minute and now that I'm a little less frustrated I want to thank you guys for jumping in so quick.
This is a magnum 5.9 engine that I built 5 years ago, 3 years ago I had a head gasket blow between 1-3 on that head in question, but it was on the odd bank at that time. Now that head is on the even bank so 1-3 has moved to 6-8, and the problem now is on 2-4.
Heads are heavily ported factory 2001 casting, floors have been raised with epoxy (thinking I should pull the manifold and check that it has not come loose)
manifold is the speedmaster air gap copy, also heavily ported with floors raised by welding.
Carb is Street demon 750.
Ignition is large cap HEI with pertronics module.
Since the last head gasket change, motor has run strong for 3 years until 3 weeks ago. I went on a little joyride, aerosolized a little bit of rubber off my tires, then made a 40 mile round trip to the hardware store. About 3 miles from the house I noticed it was running really rough and tried to die at the stop sign near the house. I pull into the garage and pop the hood, pulled spark plug wires with it running to check for dead cylinders and found that two and four make no change when I pull the wires. I then hit the tubes with a spray bottle of water and found them to be very much colder than the rest. I then inspected the distributor cap and found that it was loose because two of the hooks came undone. While I was pulling wires, a couple of them became damaged because they are older so I replaced them with brand new wires, cleaned all of the spark plugs, inspected to the contacts in the cap and found them to be clean so I put it back on and made sure it was on correctly this time securely with the hooks, and I still have two dead cylinders. As I mentioned, I still have yet to do the leak down test but compression is perfect. I did the compression test with all spark plugs out of the engine so it would not build pressure between cylinders in the event the gasket is blown out between two of them. In all of this, I never had the intake or a carburetor apart and it was running flawlessly until it wasn't.
