Hello there, I’m having some issues with my 1996 Mazda MX3 1.6L 5-speed. I’ll begin by listing the symptoms/issues my car is having, followed by what I’ve done to try and solve these issues.
RPM’s dropping to about 200-300: sometimes even lower almost causing the car to stall (oil/engine lights come on like it’s stalled, but engine revs back up) and even occasionally stalling completely. This typically happens when coming to a stop and pressing the clutch in. Also it typically happens after the car has warmed up.
Rough idle: After the RPM’s drop down to that low range (200-300ish) they’ll usually jump back up to about 700(ish) which is a bit low compared to what my normal idle RPM’s should be.
“Pulling” while driving: I notice this most frequently in 3rd gear while going a constant speed (not accelerating) the car feels as if it’s pulling or jolting forward, and as soon as I put some pressure on the gas this usually goes away.
Whistling sound: I can hear a faint whistling sound from under the hood, it’s not very loud and most noticeable right after starting the car.
Power not going to wheels: This symptom doesn’t happen as often as the others but sometimes I feel as if even though I’m accelerating the power isn’t going to the wheels right away, instead there is a slight hesitation before the power goes to them.
Things I have done:
- Removed and cleaned the throttle body
- Removed and cleaned the IAC (Idle Air Control valve)
- Replaced the O2 sensors
-After some research I read that the cause of this could be a vacuum leak, and when checking under the hood I noticed my air intake hose had a crack in it, which has since been repaired.
-After replacing the O2 sensors the issues did seem to disappear for a few days, but since then have returned.
-My car isn’t throwing any codes
I’m hoping someone here might have some insight/suggestions on what I should check/be looking for as the cause of my issues. And if you need any additional information, I’ll be checking this post frequently and can provide it.
Thanks in Advance,