okay I'm pretty much lost as to what this is, I have an 98 dodge Durango with the 5.2 anyways I keep getting this misfire code and its for #1 and #5 I've changed the spark plugs, the plug wires, rotor and rotor cap and all that good stuff, but still no change, it also dose this strange thing around 45mph and up where it's jerking, as if someone's putting it outta gear and back in, this stops when I step on the gas hard and it downshifts, this is also when the light comes back on is when it's jerking, and there's even some times the check engine light just turns off and the codes arnt to be found, I have no idea what's going on, but maybe someone on here dose, any help would be much appreciated, thanks

 

well it sounds like a pretty typical description of a misfire, seeing as you already did the basics the next two things to do are get a compression check on the cylinders, and replace the ignition coil, when they get weak they can cause misfiring

 

Did you cross the wires? I missed the fire order by one and got a backfire.

 

A 5.2 has one coil. My guess is the injectors are dirty. Not that expensive at rockauto.

 

Okay guys ill try that stuff tomorrow and let you know what I find, thanks, oh and I've already checked the wires hopeing it was something simple as I just bought the car to find out a week later it has this problem

 

You know now that I think.of it when I first got the car it felt like it lost power, then it Poped and it was back (backfire maybe?)

 

okay did a compression test today
#1 80
#2 125
#3 95
#4 80
#5 90
#6 100
#7 105
#8 90
so nothing to bad, also i had a tpypeo it was #2 and #8 miss

 

There is a way to check to see if the pistons are bad. You can use a stethoscope on the block to hear rattling, or hold a screwdriver on it to feel hard vibration.

 

I've already tryed today, nothing seemed abnormal, they all seemed the same, no big vibration anything