Check Engine Light?

We need to code number which can be done by using this guide.

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

Please run down this guide and report back.

My Check Engine Light ( MIL ) comes on and when I check with a reader I am getting 0304 and sometimes 0402 as a second code. The truck starts fine but dies if I am accelerating and come to a stop until it warms up .. The engine is misfiring and sluggish until hot and then runs pretty normally ( still backfires when accelerating uphill. The Haynes manuals say the 0304 is cylinder 4 misfire and 0402 is excess exhaust gas recirc excess pressure. I clear the MIL but within 20 mins it is back on. HELP!!!

A misfire you need to check it for tune up
check the spark plugs and wires
check EGR remove clean and check DPFE too

Thanks / Replaced plugs and wires as a first try to no avail. Will try the EGR next ..

also check the coil if firing #4 cyl

Engine running rough, poor excelleration up hill, poor gas mileage, had a smell like sulfur odor when first started. check engine light is on.

sounds like a bad convertor plogging the exhaust system, get the check engine light scanned to see if it confirms what i belive or if there is another problem.

Engine Mechanical problem
2001 Ford Ranger 6 cyl Four Wheel Drive Automatic 115k miles

runs fine going down the road but wants to idle at 500rpm or less. very rough idle check engine light is on.

Take it to your local auto part store and have them retrieve the trouble codes (DTC). When you have the code(s), post back and we’ll start from there. Some stores do it for free (autozone, o’reilly)

The CHECK ENGINE light came on and does not go out. I replaced both oxygen sensors but the llight remains. What are other possible causes for the light to stasy on?

Are you getting P0171, P0174 codes? If so look for a vacuum leak. Check all vacuum hoses as well as the intake manifold gaskets. Pay close attention to the PCV hose as they tend to deteriorate. If you need more help, let me know.
Dave

Engine Performance problem
2001 Ford Ranger 6 cyl Two Wheel Drive Automatic

it jumps when you give it gas and after you drive it for a while it runs loud. i have changed the fuel filter, spark plugs and wires and air filter. the check engine light comes on.l

If the check engine light comes on, that means there is a trouble code stored. Take the truck to a nationally recognized parts store and have them scan the computer for codes. Most will do it for free, and then you'll know where the problem is coming from.

engine light comes on running rough have replaced the ignition coil and spark plugs and wires. when put on the tester it said it was miss firing on 1 and 2 cylinders

Check to make sure the injectors are working properly. Check fuel pump pressure. If they are good and you tuned it up already, check cylinders for compression.

My check gauge light comes on for just a second when stepping on the accelerator, also engine will sputter and backfire when accelerating. Can someone tell me exactly what the problem is without too much trial and error? And before I have to tell my WIFE.

hi check guages light will be on when a guage is not reading properly.as in low oil pressure low fuel low amps.have the alternator tested low voltage could be a possibility.if you want to heck these things an get back with me ,i will try and help thanks billymac

Billymac, thanks for the reply. I checked the alternater and it is good to go. To me it seems like it may be fuel related. Fuel filter or fuel pump? To me, it makes sense that the "check gauge" light would come on if it thinks that I'm running out of gas. Hense the bad fuel filter or fuel pump. What do you think? Oh, and now the check engine light has come on and stays on. It is still sputters on acceleration. It won't do it all the time though. Do you think it could be a cylinder or 2 missfiring?

hi well it certainly could be fuel related ,, as far as the sputter but the check guage is only for the gauges . it may be an erronous malfuntion. the check eng light you need to get the codes and go from their. i would tune up and new fuel filter and see if it helps. let me know billymac

I have a 2001 ford ranger. I just recently purchased it, and I thought I'd do a tune up on it so I did. I put new wires&plugs and now when I drive in town my check engine light comes on, it shows code p306 ,to which I know to be a #6 cylinder mis-fire, I've chanded the plug&wire 2times now& I still get the same code. If I clear the code& drive it on the high-way the light never comes on, but in town it will. The size of my motor is a 3.0L, do you have any idea what it might be?

Two things to try are switching the number 6 injector with one from a different cylinder to see if the misfire moves to that other cylinder, and check the routing of the plug wires. If any are too close together, the current through one can induce a voltage spike into another one causing that plug to fire at the wrong time.

Misfires are detected by the rotational speed of the crankshaft slowing down momentarily. That is what allows us to feel it. At highway speeds that may not last long enough to be detected, but the misfire event will last longer at slower speeds and that may be the only time it is detected.

Forgot to mention that many engines do not like fancy spark plugs or those from some manufacturers. As a test, try reinstalling the old plug in cylinder 6. If that stops the code from setting, check the new one's gap and brand. Check the new plug wire too or switch it with a different one. If the end wasn't fully seated, (we all do that sooner or later), the terminal can burn away leading to a misfire. That will take some time to show up.

rough idle even more when it is put ingear. Very rough at speeds 45 to55. Check engine light is also on. What could be the promblem?

First thing you need to do is have the codes read, Post the results with the code number(s). Even if the service engine light is not on, there should be freeze frame data stored.
If it won't make it, buy a cheap scanner, they can be had for 30-40 dollars, a good investment, since they cover all cars sold in the USA from 96 on...
If the light is blinking, it means possible damage to the Catalytic converter...misfires...service it right away!

Hi, my truck just started doing this. It runs fine but when at idle (like at a light or just stopped) it lopes. The check engine light is on and it is sucking gas like crazy.
I am buying a scan tool to day to get the codes. But an wondering what you think about this. Thanks!
Stacey

really would not like to jump to conclusions till the codes are scanned.

but if i was to guess i would be thinking o2 sensor code.

I got a scan tool but it won't work on the ranger! No codes no messages nothing! I tried it on an older car and it worked fine. Any ideas?
I am going crazy, I need to fix this truck and now I can't even get the codes.
Thanks for your help!

Stacey

Ok found out the scanner wouldn't work because of a blown fuse!
These are the codes I got....

P0102 - MAF or VAF A circuit low input
P0171 - Systen too lean (bank 1)
P0174 - System too lean (bank 2)
P0300 - Random/multiple cylinder misfire detected (I don't believe thia one).
P1504 - Idle air control circuit

Like I said it runs fine just burning gas like crazy and lopes at idle.
Any ideas?
Thanks!
Stacey (single mom trying to help daughter out)
I was going to try cleaning the MAF and IAC today, do yu think this will help?

deffintely recommend cleaning the maf sensor see if you can clear up that code, the maf sensor can cause the o2 sensors codes and the missfire code to be thrown.

low input means its not sending as high a signal indicating too little air coming in which is likely a missread from a dirty sensor, when in actuallity it is getting too much air messing up the other codes.

clean the iac see if that helps the bad idle, could be the maf sensor, on hook it, does it idle better?

So it turned out to be a bad MAF, I replaced it, then I drove the truck....Check engine light came back on. Replacing the MAF cleared 4 out of 5 codes. The one code I have now is P0300, misfire.

The idle is rough and does feel like a misfire. Going to check the plugs today. If not the plugs what would your second guess be?

I have lost 4 lbs fretting over this for 5 days now. Thanks for your help!

Stacey

check the ignition coil also. could be causing that problem.

try unhooking various sensors and running it to see if you can cure the missfire.

I have a 2001 Ford Ranger XLT. 3.0 liter V-6 Automatic w/overdrive. 133,000 miles. I have had no problems with this truck until recently. Other day was driving to work & check engine light came on and engine started running rough. There seems to be a vibration in the motor. It doesn't die, there is just a noticeable vibration when the engine is running. I have made a visual inspection of engine & see nothing out of the ordinary. I also replaced the spark plugs. Nothing changed. I understand the most logical thing to do would go have the codes pulled rather than continuing with this system of elimination, but until then, what does this sound like to you? Also, the speedo needle has been jumping when at idle between 10-15 mph. Not all the time, but this started when the engine started running rough. Any ideas?

A flashing check engine light means it has a bad steady miss....a cylinder basically not firing at all...
It sounds like a bad plug wire....how were the ends that snap onto the plugs when yo did the plugs?
The jumping speedo could very well be spark energy jumping out of the insulation of the wire and shunting into the wiring and messing with the gauges..
Look at wires at night with under hood light out....shake the wires a bit...look for high energy current running/jumping/arcing around...
I would replace them, or ohm them out with a DVOM to make sure there is not one with high resistance or even a total break in conductivity between the ends..

Could be the throttle position sensor going whack-We won't know till you get a read out of the OBD2. You can take it to autozone and get read for free and who knows they might just hook you up on the spot and send you home happy.