Having problems with your Cars & Trucks ?

99 ford explorer. Check engine light flashes when driving and engine feels like nor firing correct. Went to auto zone to diagnose and they said 6 cylinder not misfire. Changed plug but still continues to misfire. What else can I check?

Posted / edited by AnonymousUser on : 22-01-2018

Answers :

Check the coil packs
Repair Help & Product Troubleshooting for Cars & Trucks

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

Engine misfires i have a 2003 ford explorer and my check engine light came on. I had it checked and it said that cylinder 3 was misfiring. I changed the spark plugs on all cylinders and cleaned the fuel injector. But it is still running rough. What else can i do??

You didnt mention having changed the spark plug wires, so that is another item that could be culprit as well. As well, it could be a coil pack that is not working properly.I cannot recall at the moment if that model year uses coil on plu ... 2003 Ford Explorer

99 ford explorer. Check engine light flashes when driving and engine feels like nor firing correct. Went to auto zone to diagnose and they said 6 cylinder not misfire. Changed plug but still continues to misfire. What else can I check?

Check the coil packs ... Cars & Trucks

I have a 2000 Regal GS. The check engine light flashes above 70 MPH. I got the code scanned and it first said misfire on cylinder 1. then now it says misfire on multiple or random cylinders. i have changed plugs, wires, and swapped coil packs and also dumped injector cleaner in the tank. i also got a p0440 code for the emission system but now that has gone away. i am wondering what else to try and if the p0440 code cause the other code to go off or the other way around. everything runs fine and

Possibly oxygen sensor/s? ... 1999 Buick Regal

My 2002 forester started misfiring about 3 weeks ago and the check engine light came on. I only notice the misfire while idling. It seems to accelerate just fine. I took it to autozone, they told me cylinder 3 was misfiring. I put in fuel injector cleaner. This worked and the check engine light came on again and the check engine reader said cylinder 3 again. So I thought since the fuel injection cleaner work for a bit that it might be a fuel injector. So I changed that injector. ( I unplugged th

Hello first of all\015\012\015\012I would be glad to give you the best advice as a mechanic for 8 years 3 for bmw and 5 with ford motor company.\015\012\015\012That being said your diagnosis is good and you follow ... Subaru Forester

I have a 2001 Ford Escort. It was idling rough and starting to cut out when sitting at stop lights. I changed the plugs and within a week the Check Engine light came on. It is still idling rough but not cutting out. It runs fine on the highway, no hesitation. I had it checked and they said the cylinder 3 is misfiring. I have had the injection system cleaned, put on a new PCV sensor and put new plugs and wires on. Also I put a new fuel filter in. What else can this be? I would appreciate any help

Well the misfire in Cylinder 3 will commonly be that your plug has gone bad. If that is the only code that it is throwing out then it could be an array of things going on. It sounds though that you may have a throttle position sensor out or that you ... 2003 Hyundai Tiburon

I have a 2000 jeep wrangler with a 6 cylinder engine. The check engine light came on so I went to AutoZone and they said the code indicated a #6 cylinder misfire. I changed all the plugs, restarted the engine and the light remained on. I don't have any of the symptoms (rough running, poor fuel, poor acceleration, etc.) that indicate other issues. So how do I clear the check engine light. Thanks John M

Disconnected the negative battery few minutes. THis reset the PCM, if the check turn on again, need scanned to know excatly what code you have there. ... Jeep Wrangler

I have a 2001 Jaguar S-type 4.0. I have had a check engine problem for a few weeks now. It was initially a misfire on cylinder 3. Mechanic changed ignition coil. After a few days, check engine light on again. This time misfire on cylinder 4. He changed all the spark plugs and tied together some loose cables. Check engine still there. Still on cylinder 4. Another mechanic found right side valve cover gasket leaking. He changed gasket and applied spark plug seal. Check engine came on within 15 min

Mechanic will get back to you because he doesnt know ,and neither do i to be truthful but the only way i can out of this problem is to use the right software and i mean take it to the dealers and have it hooked up and put right .This could be a ECU f ... 2003 Jaguar S-Type

I have a 1999 Ford Explorer Sport SOHC. Check engine light came on and started flashing. Took it to have it checked. They told me engine misfire in a couple different cylinders and o2 sensor. I changed all plugs and wires, put a new coil pack and a new o2 sensor. Also cleaned throttle body and air filter. Used gas treatment. Still having same problem with check engine light. Also idles rough and is very sluggish. Doesn't stay on when idling at light or stop sign. What else should I do?

Fuel filter,module. ... Cars & Trucks

So this is my problem....i own a 2004 crown victoria unmarked police unit. it all started when the check engine light came on. i got the code, it said something about the spark plugs. i changed all 8 with ford motorcraft sparlplugs. cylinders 3 and 4 both have oil on them. after cleaning them the oil always ends up back in them turning the check engine light back on. do i need a new head gasket or valve cover gasket...pcv i mean what??? some one help!!! engine misfires obviously

Are you sure its oil? Ford claims to have had the intake manifold problem fixed in '02, but that is pure garbage. Leaking (cracked) intake manifold or a bad intake gasket allow coolant to meander its way into the spark plug holes and snuffs out the s ... 2003 Ford Crown Victoria

I have a 2004 Ford freestar that is coming up with a misfire on the 2 cylinder... I got an oil change yesterday and this morning it was running fine I went out a few hours later and it was hesitating while backing up then fine then within in driving a block the check engine light came on and it was idling rough esp at stops the scanner said a misfire on cylinder 2 the plugs and wires are hard to get to myself any advice so im not paying a ton of money ? is it safe to drive ?

The coil is bad. Just buy a new coil pack and that will fix it.\015\012A friend has the same van and it was doing the same thing. ... 2004 Ford Windstar

I have a 2002 TrailBlazer with the straight 6,diognostic check said #3 cylinder was dead or misfiring, also map sensor showed up. #3 cylinder was misfiring, so to test the coil pack I swapped #3 coil pack with #2 cylinders coil pack, no change and a 2nd Diaognastic now said #2 cylinder was misfiring, Ok need new coil right ? so bought new coil pack and spark plug and changed out and no change, so bought new M.A.P sensor, again no change, still runs rough and missing, what could it be ?

Did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing? ... 2002 Chevrolet TrailBlazer

I have a 2003 ford escape. It runs rough when i start it or when im idling and on inclines. When i had the check engine light read (again) it said random misfire, misfire in the first 1000 rpm and misfire is cylinder 4 and 5. I have currently changed andd plugs and coils in 4, 5 and 6. Used fuel injecter cleaner. Dont know what to do now.

Remove the intake manifold, if necessary & change the other 3 plugs & coils,assuming a V6, if not then thecodes were wrong & you did the wrong coilsNo code tells you what to replace,only component testing doesM ... Cars & Trucks

I have had a Check Engine Light on my dash for a good 3 weeks. I noticed the Van running really ruff. I took the van to autozone and got the codes ran. The code of P0303 (cylinder 3 misfire) came back originally so I changed the plugs and it fixed the problem. About 1 week later I got a check Engine light again. I then again got the codes ran and this time it came back P0304 (cylinder 4 misfire). I then changed the plugs again, a day later the light came back so I changed the wires. Then a day a

I agree with phillyboy. Don't buy a compression gauge though. Pay a garage to check your compression. $40 or so.There are three rings on a piston, a compression ring, an oil ring and another compression ring. If your rings have failed on cylinder 4, ... 2001 Dodge Caravan

I have a 92 Accord EX. It sat for a year and a half before I bought it. The engine runs very rough in spite of the following repairs. New air filter New wires New Distributor Cap and rotor New Plugs New Alternator (repair shop for a separate issue) Muffler Repair (repair shop) Oil Change The engine does not shut off at random points. After starting it runs rough and has a noticeable decrease in power. One of the repair shops said that I had a misfire in cylinder 3. My check engine light does not

From what is mentioned from your vivid description of the car, it seems that the engine has to be checked up in th first place. There must be a good mileage clocked by the car for which adequate systematic service jobs were not done on schedules. ... 1992 Honda Accord

I have a 92 Accord EX. It sat for a year and a half before I bought it. The engine runs very rough in spite of the following repairs. New air filter New wires New Distributor Cap and rotor New Plugs New Alternator (repair shop for a separate issue) Muffler Repair (repair shop) Oil Change The engine does not shut off at random points. After starting it runs rough and has a noticeable decrease in power. One of the repair shops said that I had a misfire in cylinder 3. My check engine light does not

I had a similar problem with a 91 prelude, several mechanics including the dealership failed to find the problem.It ended up being a bad O2 sensor. The guy that finallly this out for me said the computer on early 90's hondas rely heavily on this s ... 1992 Honda Accord

I. Have a 04 Dodge Stratus coupe sxt. Scanned for codes and it said I had a cylinder 2 misfire so I changed spark plugs and coil packs. When I tried to start my car I had no fire to spark plugs .I checked my wires and found that ants were in my fuse block in the engine compartment which resulted in a main fuse/relay. Changed it as well and I'm still having the same problem .can u help

Maybe you didn't get the queen ant...lol. No really, ants in your fuse block? Gee, if any ants got near hot electrical parts of the running engine, you'd have a flying frying ant machine !I think that's what you got to do, Tracy. That is, chec ... Cars & Trucks

Jeep overheated while sitting still/driving slow. low engine coolant light keeps coming on, but radiator is full and so is overflow tank. sitting at stop lights the rpm's drop down to 400. check engine light is on and produces code: p 0303 (misfire in cylinder #3) dont't know if they are all related. hoping it is just the thermostat....took to mechanic and he said that it was the fan but that i needed to take it somewhere else who could diagnose it because he didn't have the proper equipment

... 2002 Jeep Grand Cherokee

2006 pontiac g6 second cylinder misfired.. check engine light came on got the code says the cylinder misfired. always get the oil changed when its needed we dont beat on the car. Were told a possibility of a worn wire or spark plug any ideas. We had it cleared the check engine light drove it approx. 50 miles turned it off the car sat got into it 5-6 hours later the check engine light came back on. Car has 53,000 miles on it

The p0302 code gives u a place to start u can have perfect maintainance with ur car but parts wear out ,go bad,or get damaged-- misfire in cylinder 2 can b a spark plug,a bad wire ,injector starting to clog -start with checking the plug and wire ... 2006 Pontiac G6

Hi, I have a Kia Optima 2004, 4 cylinder, automatic transmission car. Couple of months back, "Engine light" turned on and the rpm-meter stopped working. Recently, since last 2-3 days, my car starts stumbles a bit when I accelerate at the highway ramps, or when I slow down to exit from a highway. I checked a mechanic yesterday, and he read the "engine light" code, and it said the following: Misfire 1 on cylinder 1 Misfire 2 on cylinder 2 Misfire 3 on cylinder 3 Misfire 4 on cylinder

The vehicle's cpu has shut the car off and turner on service mode. The reason for the misfire is the engine timing belt is shot. If the belt snaps well you'll be needing a new engine. The cpu shut the car down to prevent this. The solution is to serv ... 2003 Kia Optima

I am getting a misfire on cylinder #5, I have changed the coil, wire and spark plug but still get the misfire error code 0305 on cylinder 5 all the time. Runs pretty rough too. I have the same problem..... I have a 2001 Grand Prix with a 3.6L V6. Error code 0305- Cyl. # 5 Misfire. I've changed the spark plugs, and wires. That didn't help at all. The engine seems to ok untill the RPM gets up to about 4000 rpm then it starts to cut out and the Check Engine light starts to flash. The only code tha

I've got a 2002 Grand Prix GTP 3.8L Supercharged V6, nearly the same motor.\015\012I had the exact same problem, misfire on Cyl. 5 and random/multiple misfire.\015\012I replaced all the wires, plugs, coils, and even the ignition mod ... 2001 Pontiac Grand Prix

We have a 2005 GMC Canyon. The check engine light has been on so we had it checked and cylinder 2 was misfiring. It was suggested that we change the spark plug for that cylinder. We ended up changing all 5 spark plugs, but the problem is that the truck in now running worse. The check engine light is now flashing. What do we do?

It sounds like it could be a coil pack or ignition problem. Can you tell me what the check engine light is reading/codes? ... 2005 GMC Canyon

Have a 1998 F-150 XLT, 4.6 (6) Windsor Engine. Recently changed out spark plugs with new high end platinums. Engine developed a skip and check engine light turned on. Checked out engine with OBDII ProScan computer hook-up and it generated a code of PO 308_#8 cylinder misfire. I changed out the one plug wire with Ford OEM 8mm wire and cleared the codes in the computer. Still skips and check engine light reappeared. Could this be a breakdown in the coil packs. Have 163,000 miles on vehicle with or

Could be the coil pack should be read in ohms about 7 to be good ... 1998 Ford F150 Regular Cab

Check engine light goes on and off and when i got it diagnosed it said misfire cylinder 4 i changed plugs and o2 sensor and light has not gone

You may want to take a look at the coil and/or wire for leaks. If these are ok check injector and cylinder compression. ... 1998 GMC Yukon

I have a 2004 Isuzu Axiom and just recently, the car has started feeling like its misfiring. We just had the oil flushed and changed, new oil filter. Just put brand new spark plugs in (and yes, they're gapped right, double checked) and the check engine light still reads "cylinder 2 and 6 misfire." I was wondering if replacing the cylinder 2 and 6 coilpacks would possibly do the trick? The problem started before the new sparkplugs were put in, but it was no where near as bad as the engine seem

... 2004 Isuzu Axiom

It is puttering as I drive and excel...I took it to the auto parts store and the ran a check engine scan...It said that my my 4th cylinder was misfiring and I got a tune-up now, its doing the same thing as if I didnt change the plugs and wires

Could be a bad injector on # 4 cylinder. ... 1997 Oldsmobile Regency
  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || www.carrestorationshop.com || Terms of Use || Contact || Privacy Policy
Load time: 3.6462 seconds