Engine misfire?

The car was first misfiring on two plugs and smoking, I overhauled the engine and put new set of plugs. I timed it with cam position one v-up and four v-down, when my crank mark on zero, On starting the car I had to move plug wires around for it to start, even though it was still misfiring. It was blasting when on their real position. So it idled for six to seven minutes and it just stopped running. After that it never started again.

Replace. Spark plugs, spark plug cables, catalisti converble, mufflerand pipes. All sensor, fuel injectors, troter, all the parts out side the engine was replase. Compretion on each cylinderis about 90 bls. Across.

Good day. I've changed my cam positions of one and four respectively, i.E, changed my timing from one to four. The engine is now excellent and very powerful. But firing order has changed completely in all terminals. I'd like to thank you for every effort and time you have offered, with your advises and concerns on making sure that I get the car in good condition. Thanks!

Okay so for the past 2 years, the check engine light in my truck has been sparatically on and off. When it comes on and begins flashing usually when idle. The car idles real rough and when I push the accelerator it takes off extremely slowly, untill about 30 mph and then the engines power returns and its ok and the light stops blinking. Now there are some times it will be on for a month or two and then it'll go away for another 2 months. Its very random. When it first happened I had it scanned and it reported a Cylinder 4 misfire. Since then I have replace the fuel filter, cleaned the injector, replaced the spark plugs, replaced the wires and was told that my O2 sensor was ok and there was no vacuum leak. No one can give me a straight answer to fix the problem and I cant afford to take it to a dealership for 3 days only to find out I could fix myself and save 600 bucks. Please help me.

I'm having the same exact issue. I took it to a shop and explained the problem. They replaced an injector. I drove it out of the lot and the problem started at the first light I stopped at.

I'm stuck with this one as well.

KEEP GETTING CYLINDER 6 MISFIRE. INSTALLED NEW PLUGS, WIRES, INJECTOR, CRANK SENSOR, COIL, AND CHECKED COMPRESSION. STILL HAS MISFIRE. WHAT DO I DO NOW?

I CHECKED COMPRESSION, HAS 150LBS. USED NOID LIGHT. GOOD PULSE. HAVNT CHECKED FUEL PRESSURE. DIDNT THINK FUEL PRESSURE WOULD CAUSE A CYLINDER TO MISFIRE. IM LOST!

I have a 2004 Ford Ranger 3.0 V6 with about 80k miles on it. A few years ago, while I was idling, the check engine light started flashing and it started running rough. The RPMs lowered to about 800 and the needle was bouncing a bit. Ten seconds later it picked right back up.

This would happen sporadically but it became more and more constant until it would do this anytime I stopped the truck and idled. However, whenever I started driving the power would kick right back in. The problem only happened when I idled.

The check engine light eventually stayed on. I used a code reader and it had two--that the truck was misfiring under 1000 RPMs and that the #6 cylinder was misfiring.

I took it to a shop and they diagnosed it as a bad plug (their code said it was the #4 cylinder). I paid them to replace the plug, drove off the lot and at the first stop the truck started running rough again.

The shop wants to tear down the engine and I'm not able to have it registered until it passes smog--which it won't because the check engine light is on. Any ideas? I've changed plugs and wires and I've cleaned the air sensors.

The compression test came up normal. I'll try moving the coil. Thanks!

Not sure. The coil pack for the 04 Ranger isn't the kind that you can move the coils around (I was told you could with older versions). I couldn't get a shop around here to bench test it so I swapped it out with one that I know works properly. Because the truck's not currently registered I've only let it idle and the CEL hasn't triggered yet. I'm hoping to put some miles on it soon to see if that was the issue. I'll add an update once I'm confident either way.