cylinder 4 misfire
#1
#4
#6
You mean the plug wires are arcing all the time to the other wires? That ain't right if so.
Did your problem start before or after you made all these changes -- in other words, did you have the problem after replacing these things, or did you replace these things and then had the problem.
Fuel injector cleaner won't fix certain injector problems. If it's not ignition, the next most likely thing is a fouled injector, I would think.
Did your problem start before or after you made all these changes -- in other words, did you have the problem after replacing these things, or did you replace these things and then had the problem.
Fuel injector cleaner won't fix certain injector problems. If it's not ignition, the next most likely thing is a fouled injector, I would think.
#7
#9
I've been dealing with the same thing. Here's what i did:
I ohm tested the coil pack per the Haynes manual and it checked out.
Swapped the #4 sparkplug with another cylinder. Code came back so it wasn't plugs.
Swapped the plug wire completely with another plug wire. The code came back so it wasn't the plugs.
I put fuel injector cleaner with the gas and the code continued to come back.
I swapped alternators with another one laying around and the code went away for good.
I swapped the alt cause I was getting a bad chirp from under the hood and thought this was the culprit. I didn't think it was related to the missfires. It might be that the battery being unhooked for 30 minutes reset all the sensors? I don''t know. But the problem is gone.
I ohm tested the coil pack per the Haynes manual and it checked out.
Swapped the #4 sparkplug with another cylinder. Code came back so it wasn't plugs.
Swapped the plug wire completely with another plug wire. The code came back so it wasn't the plugs.
I put fuel injector cleaner with the gas and the code continued to come back.
I swapped alternators with another one laying around and the code went away for good.
I swapped the alt cause I was getting a bad chirp from under the hood and thought this was the culprit. I didn't think it was related to the missfires. It might be that the battery being unhooked for 30 minutes reset all the sensors? I don''t know. But the problem is gone.
#14
Originally Posted by skankinandy
I dont see how the alternator could be related to the misfire but it might be worth a shot.
me neither. I think the battery geting unplugged may have been a factor. I don't know. I'm just glad it's gone. I was clearing the codes everytime I tried something new.
#15
#18
Originally Posted by graniteguy
I've been dealing with the same thing. Here's what i did:
I ohm tested the coil pack per the Haynes manual and it checked out.
Swapped the #4 sparkplug with another cylinder. Code came back so it wasn't plugs.
Swapped the plug wire completely with another plug wire. The code came back so it wasn't the plugs.
I put fuel injector cleaner with the gas and the code continued to come back.
I swapped alternators with another one laying around and the code went away for good.
I swapped the alt cause I was getting a bad chirp from under the hood and thought this was the culprit. I didn't think it was related to the missfires. It might be that the battery being unhooked for 30 minutes reset all the sensors? I don''t know. But the problem is gone.
I ohm tested the coil pack per the Haynes manual and it checked out.
Swapped the #4 sparkplug with another cylinder. Code came back so it wasn't plugs.
Swapped the plug wire completely with another plug wire. The code came back so it wasn't the plugs.
I put fuel injector cleaner with the gas and the code continued to come back.
I swapped alternators with another one laying around and the code went away for good.
I swapped the alt cause I was getting a bad chirp from under the hood and thought this was the culprit. I didn't think it was related to the missfires. It might be that the battery being unhooked for 30 minutes reset all the sensors? I don''t know. But the problem is gone.
It could be that the alternator isnt charging enough and making the computer not read correctly.
#19
I am having the same problem. Did you ever find out what the problem was? I have a Cyl 2 misfire code. I have replaced plugs, wires, coil, ran fuel injector cleaner, even replaced the TPS as that was another code I had at the same time. My truck runs like absolute crap at idle and stalls out sometimes when its cold. It runs so-so at any kind of throttle input.
Any Ideas???
Please Help I am stuck.
Any Ideas???
Please Help I am stuck.
#22
Misfire #4
I am having the same problem. Did you ever find out what the problem was? I have a Cyl 2 misfire code. I have replaced plugs, wires, coil, ran fuel injector cleaner, even replaced the TPS as that was another code I had at the same time. My truck runs like absolute crap at idle and stalls out sometimes when its cold. It runs so-so at any kind of throttle input.
Any Ideas???
Please Help I am stuck.
Any Ideas???
Please Help I am stuck.
Okay so after replacing everything .. plugs wires coil pack o2 sensors overflow sensor throttle body gasket upper intake gasket file filter injectors, the engine light is still on and the code reads misfire cylinder 4. However here's where it gets stupid, the engine will idle until warmed up at 1200 rpm and then it will drop to 600 rpm and the engine light starts to blink. Step on the gas and it sputtered so bad and goes 5 mph. Am I losing compression? Once I turn it off and turn it back on again, then the blinking stops it runs somewhat normal who's got an answer for that?
Last edited by Jcoolass; 08-31-2019 at 07:40 PM. Reason: 3.0 motor
#23
Misfire #4.
Okay so after replacing everything .. plugs wires coil pack o2 sensors overflow sensor throttle body gasket upper intake gasket file filter injectors, the engine light is still on and the code reads misfire cylinder 4. However here's where it gets stupid, the engine will idle until warmed up at 1200 rpm and then it will drop to 600 rpm and the engine light starts to blink. Step on the gas and it sputtered so bad and goes 5 mph. Am I losing compression? Once I turn it off and turn it back on again, then the blinking stops it runs somewhat normal who's got an answer for that?
Okay so after replacing everything .. plugs wires coil pack o2 sensors overflow sensor throttle body gasket upper intake gasket file filter injectors, the engine light is still on and the code reads misfire cylinder 4. However here's where it gets stupid, the engine will idle until warmed up at 1200 rpm and then it will drop to 600 rpm and the engine light starts to blink. Step on the gas and it sputtered so bad and goes 5 mph. Am I losing compression? Once I turn it off and turn it back on again, then the blinking stops it runs somewhat normal who's got an answer for that?
#24
Cylinder 4 misfire
So you had the same problem and you had to replace the head? Your engine light was on and would blink causing it to sputter? I threw the obII on it. It reads misfire cylinder 4 misfire on startup 1000 rpm and now it says system too lean bank 1. .. I just want to understand what i need to do. This is a 3.0 .. man what I would t give for my old 2.9 back.
#25
The alternator? Wow how did that tie into the misfire, did you ever figure that out? That doesn't make any sense whatsoever however in not surprised. I thought I had transmission problems because it shifted so hard, and all of a sudden too. It turned out to be a spark plug wire that had come off...crazy .. I'll get mine tested... I hope this works..thanks for sharing