Now there are some wires or hoses that I can't figure out where they go, one looks like a PCV but has an electrical connection on it and seems not to have any place to attach, also on the throttle body there is spot that looks like a fitting is broken off, it toward the back of the engine, the engine runs but very rough and won't idle very well!
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check vacuum hoses, pcv valve etc. it seem this is not electrical related, it is more of air exchange if my term is correct, example is the hose from engine to air filter and so on check everything cuts,kinks, rubber tend to crack at age, or when soaked in oil this sort of thing.
On 3.5L engines, the PCV Valve is located on the rear valve cover (see pictures bellow). Please note: the PCV valve must be replaced if it's removed. Access to the valve is easier if you remove the upper intake manifold. However, this is not absolutely necessary and if you are already a little mechanically inclined you can do it the way you would replaced any other PCV valve.
-A 19mm open wrench will make your life a lot easier if the PCV valve is a bit tight. It is in an awkward spot to apply pressure.
-Disconnect the electrical connector from the valve. There is a small pin or locking device on the wire that you will have to slightly depress for the connector to release.
-Disconnect the hose from the valve and turn the hose clockwise so that you have a bit of room to work with.
-Turn the PCV valve counterclockwise and remove from the valve cover. Pay close attention to the position of the valve at the point when it is to be removed. The new PCV valve will go in at that same position. Why is this important? It is possible to install the PCV valve facing in the opposite direction. Once the PCV valve in and locked it in place, it damages the locking mechanism. Therefore, if you remove it you will have to throw it away and purchase a new one.
-You just saved $130 - $150 to have the PCV replaced at the dealership...
clean the carb, or the throttle body . God only knows what all has been sucked in through that broken hose , but I would check the electrical end of it , Plugs, rotor, cap, wires, more than not, that is the rough idle problem,, check the air filter too
Ok when you're looking at your engine look at the valve cover with a black rubber hose with a funny plastic piece which fits into a rubber grommet in the valve cover. This is the pcv positive crankcase ventilation valve. Remove the pcv from hose after you've obtained a replacement throw it away insert it into the hose then the valve cover and you're good to go
Remove PCV valve from rocker cover. Run engine at i dle. Place thumb over open end of PCV valve to check for vacuum. If there is no vacuum at valve, c heck for obstruction in manifold port, hoses or PCV valve. Repair or replace as necessary.
Turn engine off. Remove PCV valve. Shake valve and listen for rattle of check valve inside. If a clear rattle is not heard, replace PCV valve.
Visually inspect valve for varnish or deposits whic h may make PCV valve operation sticky, restricted o r cause incomplete seating of valve. Replace if neces sary. An engine must be sealed for the PCV system t o function as designed. If leakage, sludging or dilut ion of oil is noted AND the PCV system is functioni ng properly, check engine for cause and repair as requ ired to insure PCV system will continue to function properly. An engine operating without any crankcase ventilation can be damaged so it is important to replace PCV valve and air cleaner breather at regul ar intervals (at least every 30,000 miles). Check a ll hoses and clamps for failure or deterioration.