|
bad gas can cause poor running but so can so many other things..
maybe clean the distributor cap, see if any of the new hoses came off, If an injector stopped working that might make the engine shake.
Id say the most obvious is that a plug wire might have worked loose, first make sure you don't have one thats just off it's plug..
you could try to get it running unplug one spark plug lead at a time or each injector, either should cause the engine to slow or shake, if you find one that does not cause a difference then that's a clue.
an exhaust leak will cause sound, but that's unlikely to cause the poor running condition you describe.. a vacuum leak can, you might have a loose intake manifold?
gas is easy to change, just siphon it add more and try if its super old gas. you can always dump it back in. a bit of fuel conditioner helps if you park a long time. if you know you will be parking it I'd buy the best gas (highest octane) you can get for that last tank. if you siphon to a Jerry can you can have a look-see for water in the bottom of can.
you might pull each plug and have a look , se if any one is different from the rest.
fuel starvation might be noticeable if it seems to choke when its burning more fuel , you can check the flow rate, see if the pump is moving the fuel ok, there is a procedure in the manual. in case the screen in your tank plugged up or similar.
the idle air valve can be checked out.. it opens and closes, you might squirt some cleaner in and try connecting it to see if it opens and closes. i seem to remember trick for checking them where you can squeeze off the hose, thought maybe if it's hard to get to you can look into that.
maybe if it should be closed and you squeeze the hose then you should see no difference and if you did it proves its open or stuck or leaking air.
is there a closed throttle switch? maybe it can be adjusted or checked if there is one.. i'm wondering if that's related to the IAC wiring, others may know if there is a micro switch that tells the car that the throttle plate is closed , IE it's idling, not under throttle. it might look like throttle position sensor, not sure.
see how I stuck a question in there ? ;-)
|