weird sound

[Anonymous]

after I push the gas really hard from idle it will hit 2000 rpm with a strange noise almost like a chain hitting the inside of a metal can. but if I gradually rise the rpm to 2350 rpm and above then it will make the same noise, is this normal, well maybe not a chain but more like a very angry growling sound I am not sure but it is not pinging and detonating sounds like a hammer hitting the inside of an engine now do any of those happen at higher rpms or all the time? I will see if I can set a sound clip later on to show what I am talking about.

 

[pedal2themetal45]

HI
Sounds like timming. If your using reg. unleaded the octain is most likely 88 or so and you car (when stock new) was built to run on 97 or better. Back then the octain was higher. You might try running prememum in it once and see what happens. If it goes away and you want to run the cheap stuff you'll have to change the timming.
Tim

 

[Anonymous]

Sure sounds like pinging or detonation to me. Pull your spark plugs and see if there are any physical marks on the plugs. Any good Chiltons or Haynes manual will show you signs of pinging or detonation.

What's your initial timing? If your timing looks like it's good, make sure the balancer hasn't slipped. You can do a quick physical check by putting the timing mark at TDC and look down the #1 spark plug hole to make sure your piston is all the way up.

Higher octane or cleaner gas (eg. Chevron) may also help as was suggested above but it sounds like the problem is pretty severe which would indicate more than bad gas.

Also, have you replaced any parts lately? I know this is an outside shot, but I had a starter gear go bad and threw some bearings back behind my flywheel. I thought I cleaned everything out, but when the car would accelerate it would rattle around and sounded like a bad ping. Try removing your inspection plate and see if any crap got stuck behind there.

Anway just some advice.

 

[Anonymous]

well I put in 91 octane and the sound is still there, but I did check my timing after setting it back to stock idle setting which was around 650 and I got about 6*. would this be responsible for the noise that I mentioned earlier?

and another thing to add: my car is having problems.
it starts up fine, runs fine but for the past 2 days after driving for 20 min it starts to die on my in gear then I punch the gas while it is still in gear and the key is still in and it starts up again then if happens again and again until in a few more minutes the car dies and wont start up agian no matter what until I wait for a few minutes then she is ok and the process starts over again. I would like to say it is overheating but it isnt it does not get over 195 and I know my gauge works cause after it is all warmed up and I turn off the car it continues to get hotter until I turn the car back on and it cools off abit again. it turns over like a sweet heard but has a problem.

I doubt it has a vacuum issue to deal with here cause I sometimes press the brake after going a few miles per hour and at times it will want to collapse but other times even going faster it will stay strong like this.

I have good wires, plugs, coil, timing(???), I want it to be the fuel filter and I have two of them one before and after fuel pump. what could be wrong. it cant be anything mechanical cause when I start her up cold turkey she is fine and dandy. she has all the fluids. I dont think this has anything to do with the premium I put cause this sort of thing happened a few weeks ago only once then I never saw it again until 2 days ago. please please help me, pep boys cant, please help.( I willl tell you all about pep boys with the next reply about this current issue ok, it is funny)

 

[Anonymous]

sounds like (and I am guessing as I have no mechanical experience...just a good reader)

1) vaccuum advance is bad
2) or you are 180* out


or maybe a carb rebuild...might be leaking gas into carb

 

[pedal2themetal45]

HI
There might be a fuel filter where the fule line goes into the carb. might check that..
tim

 

[Anonymous]

I have seen cars make all sorts of odd and weird noises because of broken motor mounts. The engine moves around and rattles things like tranny cooler lines and vac. modulator lines against the body. Just somthing else to check.

 

[Lazy JW]

I'm guessing that you may have at least two separate problems. The situation with it starting up and running fine while cold, then dying later, sounds like a fuel delivery problem to me. These older cars can get a lot of gunk in the tank/ fuel lines over the years. Some cars have a filter inside the tank that can really give you fits (don't know if yours does or not). When it dies, can you check for fuel in the carb? Or maybe pull the line off and have a helper crank the engine to check for fuel pumping(PLEASE disable the ignition while doing this test :!: ) As far as the strange noises, does it make the noise immediately upon startup, or does it have to warm up first? Pinging/detonation seldom happens until the engine is warmed up a bit.
Joe

 

[Anonymous]

thank you for all the info I had similiar theories upon this lets just hope that the fuel is all I have to worry about.

as for noise on a couple of accounts:
1) makes noise at around above 2000 rpm especially if I rev it fast, or I hear something very similiar but more temporary like a (plunk) when I plung the gas pedel for super fast accel(in park I mean.) I can still hear noise in gear, but can hear better due to no wind while car is in park or neutral( not moving at all)

2) the car does not viborate in any way it is just a strang noise if I can I will record a sound clip for you today or tomorrow and maybe have in on here by the weekend for you all to hear what I mean.

3) the only line that goes near the engine to even vibrate against is the vacuum line that goes into the transmission casing for pressure shifiting.
I hear the noise almost on the passanger side of the car anyways.

thank you and please dont stop throwing ideas at me about this please.

 

[Anonymous]

2000 in park or in gear while moving?

maybe a loose ball joint? wild guess that is probably wrong

 

[Lazy JW]

If it is making this noise immediately upon startup, I would be inclined to do some exploratory surgery before it becomes expensive. It may be nothing bad, but it could be. A valve cover gasket doesn't cost much, neither does a timing cover gasket. You can also pull the distributor and the fuel pump to inspect for trouble. A loose flex plate can do some weird things too. Without actually hearing the noises, it is difficult to pinpoint where to start looking. Good luck,
Joe

 

[Anonymous]

yer car gets to 195? thats pretty damn hot.. mine just stays at cold on the meter 83 fairmont 200block 1barrel carb

 

[Anonymous]

I would not be afreaid of the 195 degree. That is not hot at all for a car with and aged cooling system. A lot of new cars run 190 to 195 degree thermostats.
Two things come to mind as far as the stalling. One could be a bad condenser in the distributor. I have had these go bad out of the box. Sometimes I was able to start back up, and others, you had to wait until it cooled down.
I also wonder if your choke is working properly. My car ran fine on the commute to work until some colder weather hit. Then it would often die as I was making turns, slowing down etc. Problem solved when choke was fixed. But, that should not prevent you from starting again unless the choke is flooding the engine.

As far the engine noise, I am at a bit of a loss if I understand you correctly. Your first posts made it sound timing related possibly under light throttle conditions. But your posts about it making noises with it in park is confusing. Unless the timing is way off, you typically do not hear pinging from timing issues while in park. They normally occur when the engine is under load. So it sounds like you may have something making a mechanical noise versus a timing/spark related noise.

When you say it starts up by punching the gas with it in gear and the key in, are you implying that you are just giving it the gas and it does not really die? Or are you implying that you are turning the ignition key while doing this? If you are using the key and starting it while in gear, you could have some sort of intermittant fault in the neutral safety switch. The car should not start up while it is in gear. Can you clarify?
Doug

 

[Anonymous]

what I did was the car was in gear when it died it was still moving and punch the gas and sometimes it started back up still in gear by just pushing the gas. then sometimes it would die again then I put in in neutral to start it up by turning the key and sometimes that would work and then it would not.

anyways what i did yesterday was I took out the filter before the pump and found alot of something in it. it looked like what wax in the ears look like and I blew it out and it was alot. it was a light color creamy dry stuff. then I changed the filter out with a big one and I am not sure yet have to drive long enough to see real results but it might have gone away.

then I pressed the gas and at 2000 rpm the noise is gone not it is moved up to above 3200 rpm to hear that noise and it is still light noise at that rpm but still there. timing is still 6*. should i turn it back a bit to like say 10*. I am still using premium in the tank.

the filter in the carb is clean all the way.