Alright, so today coming home from work in traffic my truck started to shake it self to pieces. The Check Engine light started to blink so I pulled over. I have dual exhaust and on the drivers side it was popping out of it, not a loud backfire but just sort of a pop. It was also smelling really rich. Now, The common things if read are either Spark Plug,COP,Fuel Injector causing the miss fire. My guess is a fuel injector is stuck open, but I cant get the code read until Friday. Anybody else have any other possible causes?

 

mine too started this 2 days ago. I think my plugs are going bad, but I'd like to hear what someone else has to say.

 

Get the code read - Replace the bad Coil. - Done

 

my light isn't on, it just blinked and went off.

 

That's okay , it doesn't have to be on. Blink = Code Pending . Off = Code stored. So , see which 300 series code you have Friday and fix it .

 

So its more then likely not something serious. I was pretty dam scared when it happened, but after some research its most like a coil, spark plug or fuel injector.

 

Nah ,it's a coil, not to serious yet, but get it fixed ASAP before it fails totally. They usually have them in stock.

 

no joke, it feels like the whole truck is going to shake apart

 

I just went through this. Mine was p302 - Misfire Cylinder 2. Replaced Coil and Plug and it runs like a champ again. Luckily it was #2, really easy to go to comparatively.

 

Bad news, I went to autozone to get the code pulled, and it didn't have any...now what?

 

well, a stealership's tool will read codes that autozone's/ advance auto's won't. that being said, there is a way to tell if your truck is storing codes without a tool. before cranking your truck with the key in the off position, hold down the trip odometer button. while holding it down start truck, and hold for 10-15 sec, or until odometer goes into test mode. the first will be a gauge sweep, among others. scroll through them by pushing the trip odom button till you get to the one that reads: dtc:xxxx. xxxx being your stored code. if there are none, the truck will read dtc:none. turn truck off to deactivate test mode, or it will deactivate upon the end of your drive cycle when you turn the truck off. however, i am unsure if this procedure will work on all 97-03's. i KNOW for a fact it will work on the later ones, though.

 

I thought you said you had a blinking light, before it shut off ? - Huh - Did you happen to notice how long it blinked before the CEL turned off all together?

3 , 4 , 8 blinks - LOL - I guess I could just ask this - Did the Check Engine Light blink more that once ?

 

Guys I need your help. Read the first post for the story if you dont have it.

Well I went to get the code read, and it was a cylinder 8 missfire. So I bought a coil. Went home, replaced it. And had a brand new spark plug so I threw that in there aswell. And Its still miss firing. What else can be causing the 8th Cylinder miss fire. Its a new Coil and spark plug

 

Put a long handled screw driver and listen to the fuel injectors. you should be able to hear clicking. Try 2 or 3 different ones then to listen to #8. If it's not clicking, it's bad.

 

Also where do I put the dielectric grease when installing the coils. Inside whre the spring is?