idle surges when warm?
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Joined: Oct 2005
Posts: 46
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From: carova beach(OBX)
holley Inconsistant idle
My 351m has a holley 600cfm 4bl with a edelbrock intake, with all the emissions not used exept for pcv system. After the truck warms up it begins to idle irradically. it'll run smooth for a few seconds and then die down until it almost stalls. i've checked all the vac lines for any leaks and played with the timing alittle bit and that helped alittle. By the way im not sure what degree it should be set at? There is also a second port on the vacuum advance that im not familiar with(not sure if its vacuum or not, so i just pluged it). Im no ace mechanic, but will try anything if pointed in the right direction, so if you guys have any suggestions that would be great. thankx kevin
1980 F-250 4x4
35" swampers
1980 F-250 4x4
35" swampers
Thread Starter
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Freshman User
Joined: Oct 2005
Posts: 46
Likes: 0
From: carova beach(OBX)
idle surges when warm?
My 351m has a holley 600cfm 4bl, and an edelbrock preformer non-egr intake. After the truck warms up it begins to idle irradically. it'll run smooth for a few seconds and then die down until it almost stalls, but only after its warm. i've checked the vac lines for any leaks and played with the timing, that helped a little. Im not sure what degree the timing should be set at, the book states what it should be at with emissions(which i have done away with)? There is also a second port on the vacuum advance that im not familiar with(not sure if its vacuum or not, so i just pluged it), so if you guys have any suggestions that would be great. thankx in advance kevin.
1980 F-250 4x4
35" swampers
1980 F-250 4x4
35" swampers
Posting Guru
Joined: Mar 2005
Posts: 2,068
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From: western montana
welcome to FTE- someone will help you soon.
meanwhile search the 335 forum by getting back to the forum then into the advanced search using the following (+idle +problems) minus the parenthesis(). Also check the box for titles only and that will limit your search. All the info is there. PM me if you have problems searching and I'll give you a hand.
I'm wondering if you have checked the following basics:
vacuum pressure- need a guage,
meanwhile search the 335 forum by getting back to the forum then into the advanced search using the following (+idle +problems) minus the parenthesis(). Also check the box for titles only and that will limit your search. All the info is there. PM me if you have problems searching and I'll give you a hand.
I'm wondering if you have checked the following basics:
vacuum pressure- need a guage,
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