My check engine light is on ?

Interesting.. Start off by getting the codes

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

This will put you onto the trail of the source. Should it turn out to be vacuum related, a smoke machine will help flush it out.

I have a 99 Ranger. Just had fuel injection system worked on less than 6 months ago. I also had a vacuum leaked that was repaired. My Truck now shakes when started and driving and only goes up to 35 and then shakes even more. It shakes at all stops. The check engine light is stuck on solid. What could the problem be.

Steve

You need to start with finding what codes are in the pcm to start off with.

Are the plugs original?

I am not sure about the plugs I bought it used from a used car dealer. Do I need to take it to a shop for a diagnostics test to get codes??

You have several options for retreiving the codes.

Autozone parts store will do it for free.-this just gives the code #. A pretty general guess at this point.

You can buy a scanner and read the codes. Before you buy a scanner , decide how serious this is that you solve it.

You can bring it to a shop that professionals do this on a regular basis and pay them to troubleshoot it.

IT sounds like a misfire. IT is a guess that plugs maybe worn enough to cause a mis-fire..but that is a leap of faith.

my check engine light is and and wont turn off. It says my O2 sensor is bad, so i changed it then it sadi the next one was bad and so fourth until i changed all three os sensors on my truck. I unplugged the battery over night to reset the computer and still the light is on. After reseting the computer, putting all new o2 sensors in the truck, the computer still say the o2 sensor is bad. Ive even changed out the new sensors with different new sensors just to make sure those weren't faulty. Is there some other part that is sending up that code that i could change?

Hello and thanks for the donation!

A dirty or faulty catalytic converter will often throw the oxygen sensor fault code. Have the cat. converter flow tested and ensure it is working properly.

check engine came on, truck runs fine, no reduction in performance or gas milage.1999 ranger w/4.0 EFI engine. Any way to check problem without giving FORD service a million bucks for diagnosis?

The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.

Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.

yes you must have it scaned before you can even start to know whats wrong with it.

I don't know how that overpost was any benefit to anyone.

i was just trying to support what you were saying.....im sorry.

I have a check engine light on. had it checked and the code is a loose gas cap. The gas looks just fine. Is there something else I can look for.

I have never seen a loose gas cap code what is the exact code numbers you have not code descriptions? Also how do you know the gas cap is good did you have it tested?Did you inspect the gas cap seal for cracking?

I bought this new in 99 i have a ford ranger xlt with a 6cyl in it the check engine light is on I took notice that when it gets very cold out the check engine light goes out for a while.I really had no problems with the truck until now.I do general maintenance on it chage oil wires plugs etc it idles kind of rough and my gas milelage is terrible

I strongly recommend that you check our "Check Engine Light" article at
https://www.2carpros.com/articles/service-engine-soon-or-check-engine-light-on-or-flashing

Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.

Get the vehicle scanned for codes, that is where we will start diagnoses, that will tell us what made the light come on and lead us in the direction for repair.

I had it checked but the say it could be one of three censor is there any way of narrowing this down without guessing.

Just to keep things going--I will jump in--They will want to know what the codes are (The exact #'s &/or letters)--So they can give you possibilities to check/ test etc--OK, I butt out now--The Medic

Medicine man-now you're making sense-we cannot do it w/o them numbers its popping up during change of weather condition we have to catch it while on the run with the scanner/PID's data-If you wish you can take over and me and Mr.Pro we'll kick back and observe-Good Luck

Roger, be ready to pull off the overwatch mission, You know I'm rusty with the cyber-rigs....I'd be a lot better off with a carb vehicle! Last night it looked as if my 1st response drifted off into cyber-space, so I wrote it again......If this feller will come back (with good or bad news...something!) I will begin bounding forward and attack...Just stay close by with the commo, Mr. Pippy might show up with Mrs. Pippy on the OBJ, I could get counterattacked with stuff I ain't been schooled on yet! Please initiate cover fire if/ when you see a lull in my fire.---The Medic

Roger that, fire mission is prepared to go as needed-Bang this one with no comeback and I'll recommend you to 2carpros Hall of Famer

Dear mrpippy--COME ON WITH IT!!!--The Medic

I have a 99 Ford Ranger 4-wheel drive 3.0 engine, I was backing up a small grade and the rear wheel started spinning but got over the grade in 2-wheel drive it was just mostly wet grass but rear wheel did spin some, somehow it set a check engine light and the engine started missing/skipping like a regular skip, I disconnected the battery and that cleared the check engine light but the engine skipped until I rev the engine to around 3k rpm for a minute or so and the engine cleared up, I didnot have a scanner to check the engine code, I just wondered what would set a engine miss just because the rear wheel was spinning. Thanks Dan

Dan:
If the engine is running correctly now, chances are one of the spark plugs fouled for a few seconds with too much gas because of the situation. When you reved it, it cleaned itself out and returned to normal. If the truck hasn't had a tune up in some time, now may be the time to consider it. The plugs may be getting old.

[quote:280e4209f8="Jacobandnickolas"]Dan:
If the engine is running correctly now, chances are one of the spark plugs fouled for a few seconds with too much gas because of the situation. When you reved it, it cleaned itself out and returned to normal. If the truck hasn't had a tune up in some time, now may be the time to consider it. The plugs may be getting old.[/quote:280e4209f8]

Hi: I installed new Autozone plug wires and a set of Autolite Platinum spark plugs and it still sets a regular skip in the engine when the tires spin but it will clear up in a few seconds while reving the engine...... Thanks....Dan

Would removing the bulb from the instrument cluster prevent this vehicle from starting?

What is blown? but normally not, this would depend on what light is not working and if that is an indication to other problems.

Sorry just saw that it was the check light, can you get any scan info from the check connector, if not there may be an issue with power supply to the ECU.

While removing the instrument cluster I neglected to disconnect the battery. After reassembling everything I tried to start it but key turns on everything but doesn't turn the starter over. No selenoid click. Could I have shorted out a relay or fuse? I don't have access to a scan tool at this time. I did replace to check engine light bulb.

Check the 3 fuses as shown in the pic supplied.

I checked the fuses incicated and they are good. Code reader says no codes stored in memory.

OK back to some basic tests, check for spark, injection pulse and fuel pressure and if you can get the fuel pressure reading at the rail.

Can't perform those tests. When key is turned on dash lights light up and all accessories work however when key is advanced to start position the starter does not engage and no solenoid noise.

With a test light check for power at the small solenoid wire at the starter with the key on crank and ensure that the battery connections and main starter cable is tight and clean.

Checked for power at solenoid with key in crank position. No power!

Check the starter relay, at the battery junction box l.h rear of engine bay

Relays and fuses all checked ok.

If all that is ok, you will have to look at the ignition switch and if that is working you will have to do a continuity test down to the starter or get an IDS or a quality scanner and see what codes if any are set.