by cargodz » Mon Jun 25, 2007 12:14 am
This sounds all to familiar to me as my Monte was acting the same way until finally it wouldn't start at all... and it wasn't throwing a code for my or the shops tester to pick up either.
That being said, here's what I went through before I finally found the exact problem:
1) Fuel pump and filter - well you already did the filter, but I should tell you that on GMs you should normally treat 1/4 tank as if it were Empty. Reason is a lot of GMs fuel pumps pick up crud at the bottom of the tank and that can clog up the filter faster and kill your pump... so your pump may be weak now.
2) Leak - Mine was a very small fuel leak at the intake and wasn't noticable unless someone was in the car with there foot on the throttle, so I had to have the lines replaced
3) Spark plugs and wires - While this was a standard maintainence item that needed to be done, AAA of Northwest Ohio thought that it was the problem... They were wrong, but I've got new plugs and wires on now so I'm good for a while
4) O2 sensor and/ or Catalytic - Theses ones you shouldn't have to worry about, although it could make your vehicle act the way it is... It would definately throw a code that the tester would pick up
5) Mass Air Flow Sensor - This was finally the problem with mine and it wasn't the entire sensor itself that went bad, but just one of the sensors inside of it... and No it didn't show on the tester... Mine was like a $14 part that went on top of the M.A.F on the intake, so you may actually want to look into that first as it is cheap and better than some of the more expensive items already listed
Hope this helps.
This sounds all to familiar to me as my Monte was acting the same way until finally it wouldn't start at all... and it wasn't throwing a code for my or the shops tester to pick up either.
That being said, here's what I went through before I finally found the exact problem:
1) Fuel pump and filter - well you already did the filter, but I should tell you that on GMs you should normally treat 1/4 tank as if it were Empty. Reason is a lot of GMs fuel pumps pick up crud at the bottom of the tank and that can clog up the filter faster and kill your pump... so your pump may be weak now.
2) Leak - Mine was a very small fuel leak at the intake and wasn't noticable unless someone was in the car with there foot on the throttle, so I had to have the lines replaced
3) Spark plugs and wires - While this was a standard maintainence item that needed to be done, AAA of Northwest Ohio thought that it was the problem... They were wrong, but I've got new plugs and wires on now so I'm good for a while
4) O2 sensor and/ or Catalytic - Theses ones you shouldn't have to worry about, although it could make your vehicle act the way it is... It would definately throw a code that the tester would pick up
5) Mass Air Flow Sensor - This was finally the problem with mine and it wasn't the entire sensor itself that went bad, but just one of the sensors inside of it... and No it didn't show on the tester... Mine was like a $14 part that went on top of the M.A.F on the intake, so you may actually want to look into that first as it is cheap and better than some of the more expensive items already listed
Hope this helps.