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I have been getting between 160-170mpg. Is this normal for these?? If I remember correctly I was getting a lot better mileage before I did the tune up (spark plugs, wires, cap and rotor, air filter, fuel filter) The spark plugs where gaped correctly. I have a tonneau cover on the bed (soft, not hard), I would think that would help the mileage. Does anyone know about what mileage the oxygen sensor goes out, or know of a way to test it, that is my only other guess as to why the mileage is so bad, any ideas??
Also it seems to be shifting quite hard between Reverse, 1st and 2nd (auto), is there anything I can do?? I have changed the filter, and I put Lucas stabilizer in it, but it made no difference.
Any help would be greatly appreciated.
Gas mileage on something that old is tough. It could be anything and everything. Does it use a Mass Air Sensor? Check all the electrical connections for clean+tight.
Does it ping? Run rich? Check engine light? Any other symptoms?
As far as the transmission, you may be looking at a rebuild at some point with that age+ mileage.
The check engine light used to come on for like 5 minutes, and then just go off, or if you shut it off and started it right back up, it would go off. But it doesn't do that anymore. The sensors are all good as far as I can see. It doesn't seem to be running rich, I have noticed that it has been like shuttering at stoplights. The engine seems to surge, like it will go up about 3oo rpms or so, then drop back down, and over again. My main question is, if it's the O2 sensor, I think the Throttle Position Sensor may be the cause of the surgeing. But with the check engine light not being on, there isn't any trouble codes to look for.
I figured I would be needing a new transmission...
I brought it back and the dealer rebalanced all four wheels and the vibration is still occurring at 60+ mph.
Does anyone out there have any suggestions???
I'm curious as to where you bought it, when was it built, and what year is your FX4?
I bought mine in CT, it was built 13Aug2003, and it's a 2004.
I'll keep you advised as to the progress as we go.
The Michelin LTX tires and Monroe Reflex shocks I installed have given a more stable and controlled ride, but further improvement would be welcome. Information/details about Ford's suspension changes will be much-appreciated.
I have a 99 Ranger XLT ex cab 4x4 with the 4.0 and 5 speed. It has 75,000 miles.
About 4 months ago I noticed it ran very rough (like misfiring on one or more cyclinders) for about 30 seconds after starting if it's been sitting more than an hour. This doesn't happen every start, but about half the time.
A tune up didn't help. The mechanic (not Ford) then diagnosed a head or head gasket leak - based on fluid in # 4 cylinder. Took it to another mechanic for a second opinion. He kept it 3 days and disagreed with 1st mechanic's diagnosis. (He even kept 25 lbs pressure on the cooling system overnight and stuck rolled up paper towels in the # 4 spark plug hole - no fluid.) He agreed it ran rough, but had no idea why.
I finally took it to the only Ford dealer within 60 miles. (I've had VERY bad experiences with them before, and so try to avoid them.) They put it on the computer. Came up blank. They finally diagnosed it as a bad spark plug "sucking oil into the cylinder," and replaced #4 plug. It ran fine for a week; then started all over again - and seems to be getting worse.
I've pulled the #4 plug and it looks clean. The truck does not smoke, and it has never overheated or tripped any warning lights.
Sorry this post is so long. Does anyone have any notions?
Thanks,
Dimension2
I talked to a ASE mechanic that has worked on many different vehicles. He said that after 30 seconds, the computer takes over the functions of the car. Which is why after this 30 second period, the idle goes down. While the car is in this 30 second open loop, it is burning with a rich condition to keep the vehicle going until the 02 sensors, MAF sensor etc, can get heated up and take accurate readings. Anyway, the problem remains. Once the car gets about 2 minutes into operation, it runs just fine. I have done a lot of searching on the internet for similar problems, with the hope of finding a solution. Two things I will be looking into, is a Mass Air Flow sensor cleaning (with electric parts cleaner) and I will also check out the Idle Air Control Valve.
My son had the MAF sensor replaced about 20,000 miles ago to eliminate a check engine light and rough idle. Since then, the car runs much better, but lately has been getting back to its old ways. (Check engine light included)
Do you notice that if you take off and drive right away after start, that you are confronted with a huge lack of power for about 10-20 seconds?
My concern is if this is a coolant leak into the engine, I want to attack it before I have to rebuild the entire engine.
But so far there is no condensation on the oil filler cap and pulling the #4 plug showed no fouling. I guess I should try pulling the other plugs, but what a pain some of them will be!!
The problem used to rear its ugly head whenever the truck had been parked overnight. Then it was half a day. Now it's an hour.
Dimension2
I brought it into the dealer on 12/14, and the service manager called later to tell me he had good news/bad news.
It seems there was a 'Special Service Bulletin'(the step before a TSB) about premature tire wear and rim runout that caused vibration.
The good news: They are going to put on a new set of tires(upgrading from P245/75R16 to P255/70R16) and a new set of rims(they had a little runout).
The bad news: They couldn't do it today because they have to wait for the parts to come in from the distribution center.
Now I'm waiting for the call to come in and I'll wait while they swap the tires/rims and re-program the computer because of the change in tire size. After that, the service manager and I will go out and give it a test run to see if the vibration is GONE!
I'll keep you posted.
PPB
20041215.3.104800
I have also done an intake manifold cleaning with a product called Seafoam. Did wonders for the power and gas mileage.
After tires/rims were swaped out and the computer was re-programed, we took it out for a run and the vibration was GONE!!!
You mentioned the dealer gave you 3 sets of tires, but did he change the size of the tires to P255/70R16?
Also, it only takes a little out of specification for runout to cause a problem with the rims... have them checked again and get the allowable specification numbers and have them show you the readings for your rims.
The Special Service Message(SSM), not special service bulletin that I mentioned previously is #17490. Ask the dealer if he followed the recommendation in that SSM.
There is also the possibility of a driveshaft harmonic imbalance, but I have only heard of that problem, not familiar with it.
This is all the information that I can provide and wish you luck in finding a solution for your vibration.
Please keep me posted and again good luck.
In the case of excessive oil flooding a cylinder overnight after shutdown, be aware that looking for the pressence of heavy exhaust as a sign of oil burning may not be very accurate. Catalytic converters will reduce a good portion of blue smoke.
My first suspect would be a weak ignition coil or some other problem in the ignition circuit. I think your's has coil-on-plug. If so you don't have a plug wire to worry about.
You could have a intake manifold leak, although I don't believe that's a common problem on the 4.0 engine. I'd have a good technician perform a cylinder leak-down test.
Regards,
Dusty
If you have changed the transmission filter and fluid at the recommended intervals, have not taxed the vehicle beyond it's rated limits, never over heated the engine or are driving in high temperature weather at highway speeds, then there was probably something not assembled, adjusted, or something out-of-spec during initial assembly.
I agree with your decision to have the transmission repaired. One caution: all transmission servicers are NOT alike. A quality repair or rebuild can make all the difference in long-term reliability. If there are factory authorized modifications, upgrades, or retrofits, make sure they get installed.
Best regards,
Dusty
On the intake manifold suggestion. Could be possible, though most people have more symptoms of this failure with the 4.0L. Loss of coolant, and high revving idle or just stalling right from the get go.
On head gasket failure. I haven't ever heard or seen of one with these motors. I know they do happen but I tend to believe it's rare with this particular motor. If this were true you would quite possibly have a whole slew of other issues. Possible overheating, loss of coolant, rough idle all of the time, very sweet smelling exhaust (not to be confused with the normal smells encountered at start up), a check engine light, etc etc.
best luck,
JRC
It turned out to be the Input Air Control(IAC) valve. I ended up replacing it... the dealer, not me... only to find out that it could have been cleaned out with carb/injector cleaner. I kept the old one, cleaned it, and now I have a backup if needed. By the way, premium gas really doesn't get rid of the problem; it's just costing you more and it's coincidence.
Question: Does the mechanic own the gas station and has a boat payment due?... just kidding!
You might want to ask Click & Clack about this problem on their call-in show..."Car Talk".
When you finally get this resolved, please post your solution on this board so that others can learn from your experience. Good luck.
It's been several weeks and three holidays, and I haven't heard from you regarding your discussion with the dealer about the vibration and new information contained in the SSM.
What's UP???
Mechanic is my brother-in-law who said get one tank of premium because it has detergents etc in it that will clean out the system. If that didn't work he was going to try to pin down the problem.
One tank of premium costs all of $2.40 more than a regular tank, so I didn't mind trying this experiment. It seems like it worked anyway, but you are right, it could be a coincidence.
Edited to add, the problems have been gone since I got the 1 tank of premium, and I went back to 87 octane right after that. That was about 1.5 - 2 months and about 5000 or so miles.
What is your impresion of these trucks versus the All new Colorado/canyon? Any ideas?thanks Sean
Do you have Radius Arm Bushings?
These were the problem on my 2WD 1994 Ranger. Gave grunts, groans, squeaks, etc when turning and/or going through bumps, depressions, etc.
I replaced these myself. Not that much of a problem, when you know how to do it.
These bushings are large rubber bushings on the rear of a long arm that comes out of the lower part of the suspension and goes into a bracket across the frame.
The 3L has been around in the Ranger since about 1990. It seems to be a good, long-life motor. It will 'probably' ping on regular gas. Most all of them do, and Ford seems to never want to change the design to stop it. The pinging doesn't seem to cause much problems, most will run a long time pinging.
And, it will not get very good milage. If you are looking for milage, the only way is to get the 4 cylinder, 5 speed. The 4 cylinder was a new design a couple years ago, and got more horsepower. But it will still be slow.
If I buy new, it will be the 4L. It gets terrible milage, but has nice power. I just can't see a lot of difference in a new one compared to my top-of-the-line 1994 Extended Cab, Auto, 4L. It gets bad milage also, the best I've seen is 19mpg. But, I love my truck.
Ironically, his previous truck was a 92 150 4X4 w/offroad package, 5M....but his mistake, had the 300 ci. I6. And only averaged 15mpg in that.
I really like the Ranger, and if they ever make a true 4 door, like everybody else, save Mazda, then I would definitely put it on my short list. I know they aren't looking to do a true make over for several more years. But I won't be in the market until then, anyways. I'm hoping the next gen will be ready when I am.
Okay, I'm done now.
I guess it's down to the Ranger or Canyon? Anybody tried the CAnyon/Colorado? Thanks Sean.