1994 460 running rough
Thread Starter
|
Tuned
Joined: Nov 2019
Posts: 421
Likes: 67
1994 460 running rough
So my truck has done this a time or two over the last several months, but lately it’s become much more frequent. One minute it runs perfectly fine, then it will start running rough - low idle, running rich, and loss of power. It may run like that for a few seconds or 20 minutes. I have checked the engine codes a few times and have got codes 172 and 512. I will say the truck is probably due for a tune up, which I plan to do, but I don’t think the problem is a plug wire or a dist cap the way it comes and goes away. What would cause it to run like that intermittently?
Thread Starter
|
Tuned
Joined: Nov 2019
Posts: 421
Likes: 67
149,000 miles. she’s definitely got the exhaust leak on the passenger side, but it’s had it ever since I got it and always ran fine. I thought about a vacuum leak, but that wouldn’t seem to explain the intermittent running good and bad. I do plan to change the O2 sensor soon as well
Thread Starter
|
Tuned
Joined: Nov 2019
Posts: 421
Likes: 67
is it really that big of a issue? seems like every 460 out there has an exhaust leak, so you’d think more people would have problems like me. do you think it’s what’s causing the sporadic run rough?
Cargo Master
Joined: Nov 2009
Posts: 2,190
Likes: 620
Trending Topics
Thread Starter
|
Tuned
Joined: Nov 2019
Posts: 421
Likes: 67
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Lead Driver
Joined: Jan 2019
Posts: 5,085
Likes: 869
From: N.W. Alabama
your crack has gotten worse over time, some people dont mind running like crap, most are the 'farm truck' frame of mind, and it'll be fine, 1 vacuum leak I had was green EGR vacuum line, and it was the length of the line(3/4" long) and it would take heat to make it worse, winter time 'meh...too damn cold to mess with...summer holy cow its hot...got to pick one to get it fixed, or (note to self-stop being a little b i )and fix it.
Cargo Master
Joined: Nov 2009
Posts: 2,190
Likes: 620
That all depends on you. If you want to actually fix the problem, and do it right? Yes.
Mountain Pass
Joined: Jul 2020
Posts: 154
Likes: 18
From: Northern California
Gotta say my 94 F250 460 has had a passenger side exhaust leak for 16 years when it starts. It's the heat riser, goes away as soon as it opens. The truck runs great. I live in CA and the only time it failed CA smog was due to a bad plug wire. Trying to remove the nuts that hold the exhaust pipe to the manifold is guaranteed to result in broken studs and having to pull the manifold to repair and that's not my idea of fun. I guess I too have a farm truck mentality, but I'll let her leak a little.
Thread Starter
|
Tuned
Joined: Nov 2019
Posts: 421
Likes: 67
Thread Starter
|
Tuned
Joined: Nov 2019
Posts: 421
Likes: 67
Gotta say my 94 F250 460 has had a passenger side exhaust leak for 16 years when it starts. It's the heat riser, goes away as soon as it opens. The truck runs great. I live in CA and the only time it failed CA smog was due to a bad plug wire. Trying to remove the nuts that hold the exhaust pipe to the manifold is guaranteed to result in broken studs and having to pull the manifold to repair and that's not my idea of fun. I guess I too have a farm truck mentality, but I'll let her leak a little.
More Turbo
Joined: May 2014
Posts: 587
Likes: 73
So my truck has done this a time or two over the last several months, but lately it’s become much more frequent. One minute it runs perfectly fine, then it will start running rough - low idle, running rich, and loss of power. It may run like that for a few seconds or 20 minutes. I have checked the engine codes a few times and have got codes 172 and 512. I will say the truck is probably due for a tune up, which I plan to do, but I don’t think the problem is a plug wire or a dist cap the way it comes and goes away. What would cause it to run like that intermittently?