Hey guys, well as some of you may remember, a while back the truck was "jolting" and such any time i would give her gas.. finally after bout 2 weeks of this(and it getting progressivly worse) the CEL came on.. turned out to be a misfire on cylinder 4.. ok, did the motorcraft plugs/wires.. fixed it for about well, till now lol..
Its doing the same **** all over again.. just not as often.. but dam, sometiems its so bad, the whole damn truck will shake.. you can hear that the truck is running like ****..
NO CEL.. could it be the coil? Im really hoping its not a bad head.. dont want to know how much that will cost..
Oh, and i can usually tell how shes going to act when i turn her over.. i can tell by the sounds if shes going to run good or bad..
Shes got 83K on her..
2000 Ford Ranger XLT 4X4 Sport
3" PA Body Lift
35" BFG Mud Terrains
Ford Factory Roll Bar
lots of other stuff:)
Originally Posted by korey89
I wud luv foar yew two STFU.
Originally Posted by Tys 4x4 FTW
if you get an S10 i'll throw a baby in a garbage disposal. practically the same thing.
I just went to start her up, and she started pretty rough, when i put her into R, the whole damn truck started shaking, put her back into P, it smoothed out a little.. reved her up a few times, and she smoothed out to about where she should be.. Seems like the exhaust is quieter also.. may just be that im going def lol..
gotcha.. i checked the coolant.. THe radiator is FULL.. doesnt seem to be loosing any.. are there any other signs?
It takes very little coolant loss to cause the #4 misfire, so checking the level may not tell you anything. Compare #4 plug to the others. After a while, the deposits (or lack of them) will look different if coolant is present.
a compression test is simply a matter of screwing a special gauge into the spark plug hole. With the coil pack disconnected, push down the accelerator and turn the engine over with the key about 5 times. Right down the number. Repeat on all 6 and compare the numbers. This will show a bad cylinder(s) but not what is wrong with it.
A leakdown test (different gauge) can pin point the problem. With it you go straight to the bad cylinder. In simple terms you are pumping air into the cylinder (through spark plug hole) while at top dead center. With the air in cylinder you can do some Sherlock Holmes investigations. Open the radiator cap. If the water is bubbling then air is leaking through the headgasket as bob stated. if air is leaking out the tailpipe you have an exhaust valve problem. If air is leaking out the throttle body, then intake valve problem. if air is leaking out the pcv hose at the valve cover, then you have worn out rings.
Open the radiator cap. If the water is bubbling then air is leaking through the headgasket as bob stated.
I was talking about a gasket leak where the intake manifold bolts to the head, not through the head gasket. A leak at the intake manifold gasket will not be detected during a leakdown or compression test.
A gasket leak into an intake runner or runners is a very common problem with 4.0L OHV Rangers. Vac leaks may affect any or all cylinders but a coolant leak usually affects #4 only.
yeah.. i dont know what it is or if its the # 4 cylinder that is misfiring again.. since there is no CE light yet.. all i know is yesterday she was running fine one minute, went into the BX, came out and she was running like ****! like anytime i would give her gas she would jolt.. put her in nuetral, and she would be fine.. rev her up in N, and fine.. put her in gear, and she would start to misfire..
ok, so today i realized that when the truck is 'jolting' or 'bucking' when i am giving the truck gas, if i let off or put it in Neutral its smooth.. could it be the tranny is low or something? i checked the tranny fluid and it was low, went and bought tranny fluid, checked it again before i added some and it was fine?