2000 Saturn L200 Repair Question
2000 Saturn LW2 Noise Problem
Sounds like its detonating/pinging
Have the valve and ignition timing rechecked to include checking the knock sensor and EGR valve
My mechanic says that he's checked these, and they're good. Catalytic converter is good, too. He's very concerned with the loss of power, as well. Any other ideas?
Could be caused by one of the following below
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Manifold absolute pressure sensor.
Fuel pressure regulator leaking or defective fuel pump.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.
Note:If it doesn't apply disregard it and keep testing.
Ok. I gave the list to my mechanic to check out. However, I don't know if this will help you at all or not, but here goes. He says that the noise is at the top of the engine, front intake cam and towards the drivers' side. Hope this helps.
It sounds like valve tapping to me. And on an engine with over 100k miles, I'd consider that the most likely cause. Valves not opening and closing properly will still deliver clean emissions, not trigger any fault codes, and, yet, because they're impeding proper internal air/fuel flow, will seriously degrade engine performance. With the right Chilton's or Haynes manual, this is something you can replace on your own, because the mechanic is going to charge quite a bit on labor.
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I've been waiting for 5dys for a comeback -but no show-
When I answer a question I can deal with it all the way -It depends what's coming back to me to force me to fire all my heat rounds. Some experts don't like to be stepped upon,unless a back-up is requested. I for one been here 5yrs I know how it goes and who's who and what they got-
Sometimes I'm not even sure if my answer will fix it hard to do over the net-The name of the game is play it by ear
In conclusion answer the open new questions I'll deal with mine-
Ok. I got the car back from the mechanic and have driven it. The noise goes away (or at least I can't hear it) around 1500 rpms. All the time you're accelerating you can hear it. Inside the car it sounds like a rhythmic "tick," but outside it makes more of a tapping, or, as I say, diesel engine sound. Mechanic says that it's a stuck hydraulic lifter, but he recommends driving it. What do you think?
Not exactly a cheap proposition to replace lifters. I would replace it, but then again, it's something I'm quite familiar with replacing and can do it myself. It may or may not get better over time. I'd give it about 1000 miles or so and if it hasn't gotten better, consider replacing the lifters.
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