Ok, I'm going to start off by saying I'm definitely a noob on here, so I apologize in advance if this has been answered, but I DID try looking around first. I searched far and wide with no avail... *sigh*
So, I've got a '96 LS auto with a misfire. A pretty bad one. It's low RPMs only. Seems to be just fine in the mid-high range, but as soon as I'm just above idle, it misfires pretty bad. Not to the point of stalling, but it makes the engine rock 4 inches front to back. (Yes, my mounts are fine). Engine codes galore, but deciphering anything they tell me at autozone is pretty futile...
I replaced the distributor, wires, plugs, sea foamed the crap out of it (valve train, intake, and fuel system), adjusted the distributor to the point that it would idle nice when warm, and replaced the PCV valve.
I did notice that when the A/C button is engaged, the engine bogs down big time and shakes badly. This is a randomly occurring thing. Sometimes it does, sometimes it won't... ?? The compressor is fine. Bearings are good, holds pressure, and the A/C system pumps out nice cold air.
It is a random misfire code that was read at autozone, and it is very clear and audible when it happens. It almost sounds like the engine "stutters" every 10 seconds or less.
I looked for vacuum leaks, and nothing. Everything is good in the vacuum department. However, there is the sensor on top of the intake manifold that's right by the throttle body. I guess it's the evaporative emissions purge control solenoid (EVAP solenoid)? I unplugged it momentarily while the engine was idling and nothing happened to the idle. Could this be the sign of a faulty sensor? Or does it do darn near nothing (aside from it's intended purpose of allowing gasses to be released)? I did some research on that solenoid, and supposedly it affects the A/C system? I have no clue, but that's why i'm here asking. lol
If anyone has any tips and/or suggestions, I would be very grateful.
Thanks all!
So, I've got a '96 LS auto with a misfire. A pretty bad one. It's low RPMs only. Seems to be just fine in the mid-high range, but as soon as I'm just above idle, it misfires pretty bad. Not to the point of stalling, but it makes the engine rock 4 inches front to back. (Yes, my mounts are fine). Engine codes galore, but deciphering anything they tell me at autozone is pretty futile...
I replaced the distributor, wires, plugs, sea foamed the crap out of it (valve train, intake, and fuel system), adjusted the distributor to the point that it would idle nice when warm, and replaced the PCV valve.
I did notice that when the A/C button is engaged, the engine bogs down big time and shakes badly. This is a randomly occurring thing. Sometimes it does, sometimes it won't... ?? The compressor is fine. Bearings are good, holds pressure, and the A/C system pumps out nice cold air.
It is a random misfire code that was read at autozone, and it is very clear and audible when it happens. It almost sounds like the engine "stutters" every 10 seconds or less.
I looked for vacuum leaks, and nothing. Everything is good in the vacuum department. However, there is the sensor on top of the intake manifold that's right by the throttle body. I guess it's the evaporative emissions purge control solenoid (EVAP solenoid)? I unplugged it momentarily while the engine was idling and nothing happened to the idle. Could this be the sign of a faulty sensor? Or does it do darn near nothing (aside from it's intended purpose of allowing gasses to be released)? I did some research on that solenoid, and supposedly it affects the A/C system? I have no clue, but that's why i'm here asking. lol
If anyone has any tips and/or suggestions, I would be very grateful.
Thanks all!