1968 400 Not running on cyls 5 and 8
#1
1968 400 Not running on cyls 5 and 8
Hi Everyone,
I have a question. A friends '68 400 is not running on cylinders 5 and 8. They both have spark and compression. They share an intake manifold runner. I have seen other engines with the two cylinders sharing a runner where one cylinder has an issue not allowing the other one to run. That runner has the vacuum port to the brake booster so I though it may have been a vacuum leak at the booster. I blocked off the hose to the booster and still 5&8 do not run. Plugs are not wet, has spark and 165psi compression. Any ideas??
Thanks for any help.
I have a question. A friends '68 400 is not running on cylinders 5 and 8. They both have spark and compression. They share an intake manifold runner. I have seen other engines with the two cylinders sharing a runner where one cylinder has an issue not allowing the other one to run. That runner has the vacuum port to the brake booster so I though it may have been a vacuum leak at the booster. I blocked off the hose to the booster and still 5&8 do not run. Plugs are not wet, has spark and 165psi compression. Any ideas??
Thanks for any help.
Last edited by TwilightBlue455; January 18th, 2014 at 09:10 AM.
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