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post #1 of 7 (permalink) Old 09-13-2006, 08:57 PM Thread Starter
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noises and rough idle, need a little help

Ok, I have 2 main problems and I need to figure out what to do next. I have a 2000 3.2 Trep.

My first problem is that the car idles a little rough, feels like it's missing. I replaced the plugs, still does it. The car will also feel a little like it's surging and faltering a little on a straight stretch with no load on the engine when I'm at about 12-13k RPM. I took it today to a buddy who works at Monroe and he hooked it up to a Genisys(?) System and he found that the timing advance is hovering between 9 and 13. The car isn't throwing any codes so I have no check engine light. The dealership says it's probably the Cam sensor, one guy said maybe the timing chain, another guy said maybe it's a tranny problem. Does anyone have any ideas?

The second problem is a squealing sound that sounds like the brakes. The sound is not only when braking though. It sounds kinda like the brake pad sqeaking against a warped rotor because it kinda squeak, squeak, squeaks all the way down the road, but the car has almost new brakes and Rotors all around. I'm wondering what sounds I might hear if it's the bearings, can anyone tell me that? Has anyone experienced this?
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post #2 of 7 (permalink) Old 09-13-2006, 09:03 PM
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bearings is more of a groul noise,, very i mean very seldome a squeak,, now today i saw something interesting,, had a car come in the shop with a squeak,, just as the right front wheel turned with a load on Ie driving,, turned out to be a loose wheel,, felt tight up in the air but sure as heck it was loose, also a 3.2 has a timing belt,, how many ,iles?? has it ever been replaced?
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post #3 of 7 (permalink) Old 09-13-2006, 10:09 PM
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have you tried putting the car up on stands, putting car in neutral and spinning each wheel. this may help you isolate what could be wrong. i had to do this before and found out it was some dust cover?? or whatever bent and was hitting the wheel. sorry can't help with the engine. good luck...
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post #4 of 7 (permalink) Old 09-14-2006, 01:06 AM Thread Starter
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Quote:
Originally Posted by mlkmgr
have you tried putting the car up on stands, putting car in neutral and spinning each wheel. this may help you isolate what could be wrong. i had to do this before and found out it was some dust cover?? or whatever bent and was hitting the wheel. sorry can't help with the engine. good luck...
Where were you about 2 months ago, lol. I had the dust cover bent in and it made the most godawful noise every time I made a turn. I took it into the shop and they called me over, showed it to me, bent it back, and said "you can do that yourself next time" So anyways, that problem got fixed, but it's still making the noise, but thanks for the input, you are correct about those dust covers.
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post #5 of 7 (permalink) Old 09-14-2006, 01:17 AM Thread Starter
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Quote:
Originally Posted by DrDodge
bearings is more of a groul noise,, very i mean very seldome a squeak,, now today i saw something interesting,, had a car come in the shop with a squeak,, just as the right front wheel turned with a load on Ie driving,, turned out to be a loose wheel,, felt tight up in the air but sure as heck it was loose, also a 3.2 has a timing belt,, how many ,iles?? has it ever been replaced?
Well, I've had the tires removed and put back on twice since the noise started, and the noise hasn't changed, so it's probably not loose, but that IS a pretty strange story by the way. Somebody told me that it may be because I used Bendix pads, they said that they tend to get glazed and then squeak all the time, so I should take them off and grind off the surface and see if that fixes it, does that sound like a good plan to anyone else?

Now I need confirmation on this. First today a guy at the shop told me I had a timing belt, then at the Dodge dealership the guy in the service dept. told me that my year and engine has a chain, now you say it's a belt. I'm not saying you're wrong, I'm just saying are you certain? And why doesn't anyone agree on this point?

In any case, the car has 82k on it, and I just bought it a year ago so I'm not sure if it ever was replaced. But if you are asking then I'm assuming that you are leaning more toward the belt than the sensor. However, let me ask this, if the belt slips, wouldn't it just retard the spark advance, not speed it it up (forgive me if that doesn't make sense, I'm in over my head and trying to sound like I know what I'm talking about)?
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post #6 of 7 (permalink) Old 09-14-2006, 11:18 AM
 
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Quote:
"if the belt slips, wouldn't it just retard the spark advance, not speed it it up"...
Good logic, but the timing belt has slots (like teeth on a gear,sorta)that couples to
the driven pulley. Slippage isn't allowed...
Factory Service Manual (on this site!!)can ease your mind-better than a "shop guy". Knowledge is good!
fact- 2.7 liter has a timing CHAIN
3.2/3.5 has a timing BELT

Also; what octane are you using?
84 makes my 3.2L real unhappy! But so does the expensive gas!

Last edited by alarkyokie; 09-14-2006 at 11:24 AM.
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post #7 of 7 (permalink) Old 09-14-2006, 11:35 AM
 
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First, check for fuel and air problems.

Get a spray can of starting fluid, and, while the engine is running, shoot short squirts around the intake manifold gaskets. Any change in the engine speed or sound might well be an indication of a failed gasket.

Next, do the same to any vacuum hoses, don't forget the one that powers the cruise control.

How many miles on the PCV (valve)? Change it out and don't forget the rubber hose, that thing gets soaked with oil and deteriorates faster than you'd think.

Toss a can or two of Seafoam into the tank over 300 or so miles. This might clean out any sticking or slow fuel injector.

Beyond fuel and air problems, surging could be caused by a torque converter that has problems locking and unlocking. Sometims a full tranny service (fluid, flush, filter, pan drop, etc) will take care of the TQC as well as anything that might be in the solenoid pack.

Changing out the cam and crank sensors can't hurt except in your wallet. Usually a faulty crank sensor will kill the car dead. The cam sensor is backed up by the crank sensor so the car can run with a bad one. But in either case, the PCM should be throwing a fault code. The PCM monitors the signals from the cam and crank sensors in such a way that a slipped timing belt will throw a fault code too.

However, if you have any doubt as to the health of the timing belt, go get it changed. The 3.2 & 3.5 are interference motors and you run a real risk of some serious valve damage if the motor is run until the belt actually brakes. The service interval is something like 110k miles. As long as the front of the engine is open, get the water pump, coolant, timing belt tensioner, etc, etc all changed too.

Last edited by '98-ESer; 09-15-2006 at 11:28 AM.
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