miss off idle
Thread Starter
|
Senior User
Joined: May 2010
Posts: 223
Likes: 0
From: Florida
miss off idle
74 390, just change intake, cam, and headers. I now have a miss off idle and will go away as it speeds up. My compression readings are 1 at 102, 4 at 105, 2 at 110, and 1 at 111. The wet test is 4 at 110, 1 at 115, and 3 at 120. Is my engine too wore out to handle the up grades? It ran fine with the stock 2 barralel, intake, and exhaust manifolds.
Senior User
Joined: Aug 2010
Posts: 113
Likes: 0
From: Moreno Valley
74 390, just change intake, cam, and headers. I now have a miss off idle and will go away as it speeds up. My compression readings are 1 at 102, 4 at 105, 2 at 110, and 1 at 111. The wet test is 4 at 110, 1 at 115, and 3 at 120. Is my engine too wore out to handle the up grades? It ran fine with the stock 2 barralel, intake, and exhaust manifolds.
Pull the plugs and check them or replace
Maybe a piece of carbon is fouling a plug at idle
Possible vacuum leak ?
Lonnie
Thread Starter
|
Senior User
Joined: May 2010
Posts: 223
Likes: 0
From: Florida
I am now thinking my cam or lifters are bad due to the oil not having the zinc properties, i used lube when assembling the parts but have since learned if you do not use an oil additive you may have problems.
Freshman User
Joined: Mar 2011
Posts: 30
Likes: 0
I had a similar problem. After some research, I found out that FEs are NOTORIOUS for misfire due to spark jumping between the #7 and #8 spark plug wires.
Checking the separation of those two wires might be something to look at.
Checking the separation of those two wires might be something to look at.
Posting Guru
Joined: Mar 2006
Posts: 1,182
Likes: 1
Can you describe your symptoms in a little more detail?
I'm wondering if what you are describing is a fuel or electrical issue. Maybe the accelerator pump shot isn't enough, now that you've upgraded the internals?
Have you already drained the oil since the break-in? If so...did you see a lot of metal?
I'm wondering if what you are describing is a fuel or electrical issue. Maybe the accelerator pump shot isn't enough, now that you've upgraded the internals?
Have you already drained the oil since the break-in? If so...did you see a lot of metal?
Thread
Thread Starter
Forum
Replies
Last Post
scbird
1968-Present E-Series Van/Cutaway/Chassis
16
Jun 28, 2015 06:49 AM
tbm3fan
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
23
Aug 2, 2014 07:58 AM
jwtaylor
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
36
Dec 23, 2003 09:15 AM
mustange70
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
9
Jun 13, 2002 12:48 AM
