5 and 8 misfire
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
When you say the water ports are blocked off, do you mean a gasket is blocking or the intake manifold casting itself? That is known as the water cross-over passage.
(The ports in the center of the head are the heat (air) cross-over passage.)
On Edelbrocks, no, the rear water passage should not be blocked off. That rear passage connects the two banks of cylinders with coolant, circulation = balanced cooling.
(The ports in the center of the head are the heat (air) cross-over passage.)
On Edelbrocks, no, the rear water passage should not be blocked off. That rear passage connects the two banks of cylinders with coolant, circulation = balanced cooling.
Race Director
Joined: May 2006
Posts: 18,756
Likes: 2,589
rear water passage
When you say the water ports are blocked off, do you mean a gasket is blocking or the intake manifold casting itself? That is known as the water cross-over passage.
(The ports in the center of the head are the heat (air) cross-over passage.)
On Edelbrocks, no, the rear water passage should not be blocked off. That rear passage connects the two banks of cylinders with coolant, circulation = balanced cooling.
(The ports in the center of the head are the heat (air) cross-over passage.)
On Edelbrocks, no, the rear water passage should not be blocked off. That rear passage connects the two banks of cylinders with coolant, circulation = balanced cooling.
https://www.summitracing.com/parts/e...iABEgJrPPD_BwE
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,239
Likes: 9,379
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
on edelbrocks they are blocked off and there is no passage, performer and RPM
Thread Starter
Intermediate
Joined: Jan 2018
Posts: 26
Likes: 0
Hello,
Just picked up on this thread.
I'm not sure what you meant by "companion cylinders".
The firing order is 1843 6572 so 5 & 7 are sequential the firing order.
It has been known for cross fire to happen as the leads run close to each other.
You stated "misfire" just confirming you don't mean "crossfire"
Are your plug leads correct on the Distributor?
Mitch
Just picked up on this thread.
I'm not sure what you meant by "companion cylinders".
The firing order is 1843 6572 so 5 & 7 are sequential the firing order.
It has been known for cross fire to happen as the leads run close to each other.
You stated "misfire" just confirming you don't mean "crossfire"
Are your plug leads correct on the Distributor?
Mitch
Thread Starter
Intermediate
Joined: Jan 2018
Posts: 26
Likes: 0
When you say the water ports are blocked off, do you mean a gasket is blocking or the intake manifold casting itself? That is known as the water cross-over passage.
(The ports in the center of the head are the heat (air) cross-over passage.)
On Edelbrocks, no, the rear water passage should not be blocked off. That rear passage connects the two banks of cylinders with coolant, circulation = balanced cooling.
(The ports in the center of the head are the heat (air) cross-over passage.)
On Edelbrocks, no, the rear water passage should not be blocked off. That rear passage connects the two banks of cylinders with coolant, circulation = balanced cooling.
Thread Starter
Intermediate
Joined: Jan 2018
Posts: 26
Likes: 0
where do you see a rear water passage? there is none.
https://www.summitracing.com/parts/e...iABEgJrPPD_BwE
https://www.summitracing.com/parts/e...iABEgJrPPD_BwE
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Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,239
Likes: 9,379
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,239
Likes: 9,379
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Thread Starter
Intermediate
Joined: Jan 2018
Posts: 26
Likes: 0
Hello,
Just picked up on this thread.
I'm not sure what you meant by "companion cylinders".
The firing order is 1843 6572 so 5 & 7 are sequential the firing order.
It has been known for cross fire to happen as the leads run close to each other.
You stated "misfire" just confirming you don't mean "crossfire"
Are your plug leads correct on the Distributor?
Mitch
Just picked up on this thread.
I'm not sure what you meant by "companion cylinders".
The firing order is 1843 6572 so 5 & 7 are sequential the firing order.
It has been known for cross fire to happen as the leads run close to each other.
You stated "misfire" just confirming you don't mean "crossfire"
Are your plug leads correct on the Distributor?
Mitch
Burning Brakes
Joined: Sep 2009
Posts: 1,124
Likes: 140
From: Western New York
Sometimes you may think the plug wires are going in the correct orientation when in fact there is an error because it's hard to see them completely all the way to the plug. Seeing as the 2 cylinders that are causing the problem are directly across from each other on the distributor cap, try just switching those 2 wires at the cap and see if anything happens. They just might be wrong and it looks like they are correct. It's an easy change and if nothing happens you have nothing to lose and it's not going to hurt anything. Good luck.
Duane
Duane
Thread Starter
Intermediate
Joined: Jan 2018
Posts: 26
Likes: 0