Slight Engine Stumble
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Elder User
Joined: Mar 2008
Posts: 816
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From: Sandy Hook, CT
Slight Engine Stumble
'93 5.0 A/T 4x4...when I'm at a light in Drive, foot on the brake, I detect a slight engine rough running. NOT enough to even make the tach flutter, but I know they're unreliable as far as this goes. Any ideas on where to start looking? Engine is all-original 79K ...pretty well maintained. TIA!
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Elder User
Joined: Mar 2008
Posts: 816
Likes: 2
From: Sandy Hook, CT
Yes, plugs, wires & rotor were all done about 1.5 years ago....I *think* I may have actually found the culprit...Over the HVAC plenum (pass side of engine) there is a broken 'T' fitting and the hose is just dangling...it's a tiny hose, but it's a vacuum leak all the same.....I know these fittings have the durability of a soap bubble after 20 + years so I'll get to replacing them. Any good source for those?
Lead Driver
Joined: Jan 2019
Posts: 5,081
Likes: 865
From: N.W. Alabama
do them one at a time, less headache, bronco forum tells you what sizes and length
Silicone Boost/Vacuum Hose
Replace Plastic Vacuum Hoses with Rubber - Ford Bronco Forum
Silicone Boost/Vacuum Hose
Replace Plastic Vacuum Hoses with Rubber - Ford Bronco Forum
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