10 mpg?
Thread Starter
|
Mountain Pass
Joined: Feb 2011
Posts: 186
Likes: 13
10 mpg?
My 2000 ranger with the 3.0 is only getting around 10 or 11 mpg. It's got a check engine light on but the scanner just says lean condition. The truck also has a rough idle. I've replaced the fuel pressure regulator and fuel filter. Any one experienced this and fixed it? Any help is appreciated.
Postmaster
Joined: Oct 2009
Posts: 3,432
Likes: 7
A lean condtion means there is a major vacuum leak, a misfire, a lo fuel pressure condition, etc. You have to troubleshoot to find out why. Lean codes do not always mean you are running lean, only that the computer perceives that you are running lean, and that it has to add more fuel, but you could actually be running way rich if the computer is receiving bad information due to a problem.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
P1309 isn't a lean code, but is for Misfire Monitor AICE chip fault, misfire monitor disabled. So we still don't have any good clues to begin focusing in on something to begin a diagnosis suggestion list on.
Maybe run this puppy by your favorite autoparts store for a no cost computer trouble code scan & post All code Numbers found.
Bad mpg can can be caused by a number of things & the computer uses the MAF & O2 sensors to help it control fuel trim, so their PID's, along with short & long term fuel trim numbers & a fuel pressure check might be helpful to know.
Maybe run this puppy by your favorite autoparts store for a no cost computer trouble code scan & post All code Numbers found.
Bad mpg can can be caused by a number of things & the computer uses the MAF & O2 sensors to help it control fuel trim, so their PID's, along with short & long term fuel trim numbers & a fuel pressure check might be helpful to know.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Thinking about this some more & seeing as how you have the 3.0L Vulcan engine with a P1309 code & that code may have to do with a sync problem between the crank & cam sensors, we need more input.
The Vulcan is known for cam sensor problems so one has to ask if your hearing any chirp, or squeeking noises coming from the top firewall passenger side of the engine, or did you recently replace the cam sensor, or do work around it just prior to this trouble code popping up?????
If your hearing noises & the sensor is worn, or if the cam sensor has recently been replaced & not properly aligned, these things can cause your code & would affect engine timing, so that might be associated with your trouble code & mpg woes.
Give us some more clues to work with & maybe we can be more specific diagnosis wise.
The Vulcan is known for cam sensor problems so one has to ask if your hearing any chirp, or squeeking noises coming from the top firewall passenger side of the engine, or did you recently replace the cam sensor, or do work around it just prior to this trouble code popping up?????
If your hearing noises & the sensor is worn, or if the cam sensor has recently been replaced & not properly aligned, these things can cause your code & would affect engine timing, so that might be associated with your trouble code & mpg woes.
Give us some more clues to work with & maybe we can be more specific diagnosis wise.
Trending Topics
Thread Starter
|
Mountain Pass
Joined: Feb 2011
Posts: 186
Likes: 13
The camshaft position sensor and the synchronizer were both replaced b4 I bought the truck. I had double checked the alignment and it's right where it needs to be. But yet this code and other indicators lead right back to it
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
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
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
OK, good feedbck & clue. Was the sensor replaced because it was making a noise & if so, was the Entire sensor assy replaced, including the sync assy & was an alignmnet tool used to install it with #1 piston at top dead center on the Compression stroke??? If the piston was at TDC on the exhust stroke, the cmp timing will be way off.
If your certain the above was properly done, have you tested the new cam sensors ouput???? Just because its new doesnt automatically earn it a pass. Here is a link on how to test it with a DVM. I'd first disable the fuel pump so the cyl walls wont be washed down with fuel while cranking the engine over to test the cam sensor. Ford Truck Enthusiasts Forums - View Single Post - code p1309
If all that checks out ok, also check the crank sensor wiring, mounting & output.
More thoughts for consideration, let us know how it goes.
If your certain the above was properly done, have you tested the new cam sensors ouput???? Just because its new doesnt automatically earn it a pass. Here is a link on how to test it with a DVM. I'd first disable the fuel pump so the cyl walls wont be washed down with fuel while cranking the engine over to test the cam sensor. Ford Truck Enthusiasts Forums - View Single Post - code p1309
If all that checks out ok, also check the crank sensor wiring, mounting & output.
More thoughts for consideration, let us know how it goes.
Thread Starter
|
Mountain Pass
Joined: Feb 2011
Posts: 186
Likes: 13
Finally had time to try that test and once again it leads right to that CMP sensor. I can't believe that would b the problem when it's been replaced twice and the synchronizer is lined up dead on.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Are you using a Ford/Motorcraft part, or a Dorman part????
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Now, using the info in the link I posted, what did you measure for voltage on your DVM for output on the cam sensor, when you cranked the engine????
If the output was suspect, did you try wiggeling the sensor wires & its wire connection at the computer connector, or have you pulled or checked the sensor & computer connectors for loose fit, pushed back, bent pins, or spread sockets, or corrosion on them????
When you had the sync out, did you notice any thing worn, or loose fit about its bearing or gear when re-inserting into the engine, or anything unusual about how the sensor fit to the sync ???
Did you mark the sync timing tang Before removing, or did you use the alignment tool & were certain the engine was at TDC on the compression stroke, before re-inserting the sync when using the alignment tool????
If all of the above is ok, the shop manual link suggests putting the ECM on your suspect list. So, can you come by a computer to substitute & see how it goes????