I Did a compression test, it came to 120 for the cylinders that I tested (I only tested 3 because the tester I used was old and didn't work very well)

I always smell unburnt gas, it can be really strong at times

I have checked all the connections I could find, they are all good

and the are filter is clean and new (just replaced)

 

You should have checked all cylinders

 

It would not have been an accurate reading, the tester was broken and had to be repaired anyway, if I can find the newer, more accurate one, I will do another test. but I think compression should be OK

 

Come again?

 

Alright. Do whatever you want.

 

If you pull the dipstick and the oil smells like gasoline, then I would be betting on bad rings. That would fall in line with the excessive blowby, rough running, especially once it is hot, and the gasoline smell. If the engine warms up and the rings stop sealing, then you are losing the air in the cylinder before it fires, which makes it run fuel rich and not burn all of the fuel plus some is washing down into the oil.

Someone else here will know better on this than me, but if it comes down to rings, can't you actually do a rings and rod bearing replacement while the engine is still in the vehicle on the 4.0? Not the best overhaul you can do but with limited space and tools it could be better than doing nothing at all.

 

I don't actually think its the rings, the blow by is there, but its not very noticeable, it blows only a very small amount of oil into the air cleaner, but it takes a long time to really be noticeable, I just assumed it was bad before because of the amount of oil in the air box, but it was actually just build up from a couple of months, also, there is a gas smell to the oil, but not very much, someone else had said that it could have been caused by a bad pressure regulator.

anyway, right now, it runs really rough, at any RPM, like miss fire, or no fire at all it also will backfire and bog down once its warmed up, to the point where its undriveable, but shutting it off fixes it for a few minutes it feels like its related to spark, it also feels like the timing could off, it feels like the chain skipped a tooth or something, so I will test the timing and if its bad, replace to chain, but other then that, what are your thoughts, could it be related to the PCM malfunctioning?

I would also like to point out that I have had this thing submerged in water many times, not to mention I live in B.C. Canada so its bassically always wet...

 

Jumped timing chains don't fix them selves the go badd a few minutes later sound like excessive fuel from miss match/stuck injectors to me.

 

Of my tips, how many and which ones have you done?

 

Oil in your air box is from a clogged pcv/ ccv line. It's the one coming out of the top of the valve cover at the rear of the motor that goes to the intake. Pull it out and stick your finger on it, there should be a good amount of suction.

Your timing issue/ idle issue sounds like you need to clean your throttle body and it's associated sensors. Also check your maps connection and hose.

Most importantly: follow cruiser's write ups. He covers a lot of this kind of stuff in them.

 

I still believe that the issue is a problem with the timing, but it was intermittent and was unpredictable. So I think it is caused by a bad sensor or wiring to that sensor. I think that the camshaft pos sensor and/or the crankshaft pos sensor could be dying. So on Saturday, I will be testing:
Camshaft pos sensor
TPS
IAC
O2 Sensor
MAP sensor
Crankshaft pos
Coolant temp sensor
Anything else you can suggest

I will also do some of the things that cruiser54 suggested in the link in his signature.
I will let you guys know how it turns out.

 

HEY!

The "cam sensor" you speak of has NO effect on what you're describing.
Start with post 1, 3, 4, and 5. Test the CPS per post 7. Get back to us.

 

So I was able to test everything I said, I also checked every single connector I could find, everything was good, all sensors passed the tests, the wiring harness is in good condition, the PCM(ECU, whatever its called) looks good inside, (no visible corrosion or burning) all the wires seem to be good. I Don't know what the problem could be, if the timing chain has jumped some teeth, I would probably know, I have heard anything slapping around or sounding loose in general from the there so I don't think its the timing chain.

So basically
- It first would want to die and misfire randomly (I don't think it was related to the engine warming up) while driving it under any conditions
- Shut it off once it started backfiring again, shut it off. Two hours later, I start it up again and it runs even worse (all the time now) misfires (all cylinders are firing, but most seem to be misfiring) if its an electrical problem, then I can't find it, if its mechanical, well I would first like to know what could cause this before I start tearing into everything.

So what could cause the symptoms above? a single part that's gone bad? or a bunch of things only partially functioning?

If someone could post here all the things that could contribute to (or solely cause) the issues I have been describing, that would be great.

 

Ever check the distributor indexing?
That would give you an idea if the chain jumped also. It's in my tips.

 

I have not, would that fix or at least affect the timing?