Symptom: Slight misfire at cruising speed and idle.
Here is what I've ruled out:
-EGR valve (vacuum pump tested)
-Injectors (tested)
-Coil pack resistance (new and tested)
-Spark plugs (new, 2 sets)
-Plug Wires (new)
-Compression (150-155 on every cyl)
-IAC numbers (21)
-TPS numbers (.44)
-Fuel Pressure (42 line off)
-Vacuum leak (mostly new lines, 19lbs at idle)f
-Weak valve spring (vacuum holds steady and does not fluctuate at idle)
I've only owned the car for a few months, the only other unknown is when the chip was purchased, before or after the new injectors were in place. I ordered a new chip this evening to rule out a timing issue with the larger injectors.
My only other thought is possible a sticky valve? I thought this was unlikely but possible. I'm just not ready to rip the heads off yet.
Who has ideas!?!?! I have access to the tools necessary for just about any diagnostic process, I'm just running out of ideas.
Here is what I've ruled out:
-EGR valve (vacuum pump tested)
-Injectors (tested)
-Coil pack resistance (new and tested)
-Spark plugs (new, 2 sets)
-Plug Wires (new)
-Compression (150-155 on every cyl)
-IAC numbers (21)
-TPS numbers (.44)
-Fuel Pressure (42 line off)
-Vacuum leak (mostly new lines, 19lbs at idle)f
-Weak valve spring (vacuum holds steady and does not fluctuate at idle)
I've only owned the car for a few months, the only other unknown is when the chip was purchased, before or after the new injectors were in place. I ordered a new chip this evening to rule out a timing issue with the larger injectors.
My only other thought is possible a sticky valve? I thought this was unlikely but possible. I'm just not ready to rip the heads off yet.
Who has ideas!?!?! I have access to the tools necessary for just about any diagnostic process, I'm just running out of ideas.