96 pontiac 2.4 4 cy sometimes runs fine other times runs rough and won't go above 40 with out really pushing it, what could be wrong
sounds like you have a fuel filter thats plugging up, when you start an engine it pressurizes the fuel filter and gunk that has settled gets pushed to the outlet, when you shut it down it depressurizes and the gunk settles again, so everytime you start you get and engine that sometimes runs good or sometimes runs bad until something in the filter lodges in a bad place and then it wont run at all. Im not sure where the fuel filter is, but i can find out if youd like, just let me know.
now another thing is the fuel pump may be beginning to fail, if you have an in tank fuel pump the filter may be there also, some rigs have a small filter with the pump and a larger more efficient one on the link. if you can get under the rig look for two or more 5/15 or 3/8 steel tube lines, usally mounted to the frame, running toward the front of the rig. an external filter will be probably mounted to the frame or in the engine compartment.
the fuel filter is where i would start.
if you can find it, see if you can take it off (engine not running), fuel filters have to go on one way, some have an arrow showing the direction of the fuel travel and some dont, make sure if you put it back on that you do it exactly as it came off.
once you get the fuel filter off, blow thru it in the direction of fuel travel and see if there is any resistance, if good there shouldnt be much, if there is, then replace it.
let me know how you make out and good luck
would apprecitate your feedback if you would please
May 21, 2009 |
1996 Pontiac Grand Am