Hey everyone, I got a deli-ma. Any help would be Greatly Appreciated!

Symptom: Immediately Upon Warmup the truck will miss, and I mean running on 3 cylinders kind of miss. It is mainly shown when the engine is at a light load. (Ex. Coasting up a slight incline) Happens at any rpm/speed as long as it is a light load. Truck idle is not terrible but you can tell it has a miss to it. I can drive it around town.. If I am flooring it, as it doesnt miss as bad when under a heavy load. (Ex. High Gear, Low Speed, Heavy Throttle). When its cold, it runs like a champ no mis, hesitate, bog nothing.. but as soon as it hits that first 130 degree registration mark on the dash.. boom it will jump skip hisitate under light load. and idle has a slight miss.

Repairs: Hughes Plenum Kit, Fuel Pump, Distributor Cap, Rotor, New Plugs (Not Bosch), New Napa Wires (Blue), Idle Air Control Valve, Throttle Position Sensor, MAF, Crankshaft Sensor, Test Injectors while doing the plenum kit, got 14.8 ohms on 7 injectors, the other gave 14.3 ohms.

Other Thoughts: Might have a vacuum leak? Bad PCM? Bad Injector? Bad O2? My spark wires are away from everything, but not moved to TSB manual specs just put them where they wouldn't arc (at least i think). I know some people say is a must, to have the ran in a certain way. I am going to do this soon. Could my vacuum lines being hooked up wrong cause this under these circumstances?

Sorry fro the long thread, didn't want to leave out any info. But that is why I am here, I need to find out my other options and solutions. Please Help!

1995 | Dodge 1500 | 4x4 | 5.2L | Manual | Ext Cab | Short-Bed | No Cat

 

You did everything right except for not replacing the o2.

 

I will be able to reply very fast, I got my email linked up to my phone.

You're probably right I'm heading to Autozone right now to buy a new o2. My fingers are crossed!

I will post back in about an hour

 

Autozone? Bad choice, get an NTK or a Denso o2 .

 

I am very limited on where I can go, I will buy it from autozone just to see if that is my problem, if it turns out to be true I will buy I better brand for sure

 

Update: replaced the o2.. drove around for about 15-20 minutes.. it didn't change a bit.
So now I'm starting to feel like it's either a EGR valve? A bad injector (that ohms correctly)
? Or a vacuum leak? Or ecu?

Ps I have sprayed my vacuum lines very thoroughly with carb cleaner with no change..

I am just trowing out ideas here?

 

Anyone? Someone has to have some insight? :-/

 

Did you unplug the battery while you were changing out O2 sensors?

 

Nope I did not know that was required *shrug*

What effect would that have? Cause it to short curcuit?

 

What brand did you buy if you got bosch that's probably why brand new out of the box they are junk