Rough Idle - New Guy Here!
Thread Starter
|
Senior User
Joined: Apr 2015
Posts: 118
Likes: 0
From: Tell City
I'm willing to try it tomorrow. I have a video but not sure how to load. It...
Link??
http://s1341.photobucket.com/user/bl...tml?sort=3&o=0
Link??
http://s1341.photobucket.com/user/bl...tml?sort=3&o=0
Senior User
Joined: Dec 2014
Posts: 140
Likes: 0
if nothing else, toss it on youtube, and copy/paste a link.
Edit- The link works. I'm not sure what to say here, as this part is sorta above my experience level. One of the guys that been here longer can probably help you more than me. I think if it was a bad injector, you'd hear a dead skip in the idle, if that helps at all. I think this may be beyond the help of an additive. Did the engine do this when you bought it, or did it start doing it after you bought?
Edit- The link works. I'm not sure what to say here, as this part is sorta above my experience level. One of the guys that been here longer can probably help you more than me. I think if it was a bad injector, you'd hear a dead skip in the idle, if that helps at all. I think this may be beyond the help of an additive. Did the engine do this when you bought it, or did it start doing it after you bought?
Thread Starter
|
Senior User
Joined: Apr 2015
Posts: 118
Likes: 0
From: Tell City
When I bought it. The boy said he did it when he got it too. So it has been doing it for a while... this is my first diesel, so IF it would be an injector, how hard is that to change? They'really expensive enough as it is so if I can save some cash I'd like to try to...
Thinking outloud, I only have throttle like after 1200 rpm or so, while both tanks and nothing is leaking externally.
Thinking outloud, I only have throttle like after 1200 rpm or so, while both tanks and nothing is leaking externally.
Thread Starter
|
Senior User
Joined: Apr 2015
Posts: 118
Likes: 0
From: Tell City
Like idling at 750 give or take a few... I can push in the peddle and it jumps to 1200 or 1000 or so after 1/4 way in. Like its either on or off its almost impossible to push it barely in to go down the road ya know?
Senior User
Joined: Dec 2014
Posts: 140
Likes: 0
I think that problem would be unrelated to the other issue. Could be a problem with the TPS (Throttle Position Sensor) A little bit of lag is normal, I have an inch of pedal play before my rpm increases, but the part about it not allowing slight increases is definitely not supposed to be that way.
Thread Starter
|
Senior User
Joined: Apr 2015
Posts: 118
Likes: 0
From: Tell City
I was thinking the sensor as well...once I get the idle figured out I will start driving it daily... hope some one else comes along n throws out ideas...
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
Why do you have your air filter disconnected? That's a good way to trash your turbocharger compressor wheel.
I would start with a fuel pressure check, at the schrader valve. Next, get the truck on a diagnostic device, and at least do a buzz test. Is it good enough at higher RPM that you can drive it around enough to get the engine hot? If so, you'll also want to do a cylinder contribution test.
I would start with a fuel pressure check, at the schrader valve. Next, get the truck on a diagnostic device, and at least do a buzz test. Is it good enough at higher RPM that you can drive it around enough to get the engine hot? If so, you'll also want to do a cylinder contribution test.
Thread Starter
|
Senior User
Joined: Apr 2015
Posts: 118
Likes: 0
From: Tell City
I ripped the boot accidently getting it off. It has since been replaced, but thanks for pointing that out. what is a Schrader valve, where is it, and how? Buzz test? And it will drive fine over 1000 rpm or so, and will get warm no problem. I drove it 75 miles home on the interstate no problems Other than a blown taillight. I'll check into all the above and what they mean and report back probably tomorrow evening.
Senior User
Joined: Dec 2014
Posts: 140
Likes: 0
I think it may need to be running for this. The fuel pressure varies heavily between RPM levels. You can actually check it with a tire pressure gauge, but as for the exact procedure, I don't remember. One of the others could probably walk you through it. Or, like you mentioned, you could probably rent an actual gauge.
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
Schrader valve - as usual the wikipedia definition is incomplete at best, but you get the idea. On the fuel pressure regulator (forward driver's side of the fuel bowl), you'll see a black cap. Under that cap is a valve that looks like a tire valve. That's a schrader valve (so are "conventional" tire valves). Harbor Freight makes a cheap fuel pressure gauge that will work on it. In a pinch, you could use a cheap dial or stick tire gauge from the parts store; just don't use it again on a tire.
Buzz test, contribution test, etc. are the diagnostic tests that you do with a communication device connected to the data link connector on the bottom of the dash. That's also how you obtain diagnostic trouble codes, and can monitor certain sensor/control data.
Buzz test, contribution test, etc. are the diagnostic tests that you do with a communication device connected to the data link connector on the bottom of the dash. That's also how you obtain diagnostic trouble codes, and can monitor certain sensor/control data.