I am going around 70 in 5th gear on the fwy, I feel some shuddering that is off and on...It feels like briefly the car doesn't accelerate for about 1/8th or less of a second at a time and off and on, so.. a shudder.

No shuddering when I take my foot off the gas, though. Happens in all gears.


Modified by kotetu at 5:25 AM 5/27/2003

 

I think thats clutch chatter but i'm not sure.

 

I don't know what clutch chatter is either

 

I'd say: if you change a gear and try to accelerate and the car doesn't accelerate or does it in a shitty way then you can start to think about the new clutch set. You can feel the slippage if you know what to expect.
There is a simple test telling you about the condition of your clutch: hit second gear and slowly go till 4000rpm and the floor the accelerator pedal. If it will pull hard then everything is OK else if rpms go high but car will not accelerate then you have a problem with your clutch.
pentaq

 

I've heard that your sapose to put your car in 5th from a stop, if it stalls right away its still good. But if it still runs or takes a few secondes to stall (after the clutch is let out) then its shot?

 

Here's what I have found on the net, does my example sound like slip?

"I am going around 70 in 5th gear on the fwy, I feel some shuddering that is off and on...It feels like briefly the car doesn't accelerate for about 1/8th or less of a second at a time and off and on, so.. a shudder."

SLIP – Caused by oil on the friction plate or worn friction plate, the symptoms of clutch slip would be partial or total loss of drive, vehicle speed lower than normal compared with engine speed.

DRAG – Clutch cable not at correct adjustment or centre plate sticking on splines. The symptoms of this would be difficulty in obtaining gear, particularly first and reverse gears.

JUDDER – Caused by warped friction plate or engine / gearbox mounts broken. The symptoms of this would be a shudder and vibration as vehicle moves off from rest.



Modified by kotetu at 5:28 AM 5/27/2003

 

anyone ? Please give me a description, what you know of clutch slippage.

Could a spring be worn? I noticed some springs in the diagrams of the clutch, pressure plate and flywheel.

Thanks again.

 

Doesn't sound like clutch slippage. What are the conditions when this happens? Cruise? Heavy load? Heavy load in all gears? Sound like it could possibly be a misfire. Clutch chatter usually occurs when engaging the clutch, it wouldn't happen when the clutch is engaged. It wont engage smoothly rather it will chatter causing the engine to vibrate. Hope this helps.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ahnold &raquo;</TD></TR><TR><TD CLASS="quote">Doesn't sound like clutch slippage. What are the conditions when this happens? Cruise? Heavy load? Heavy load in all gears? Sound like it could possibly be a misfire. Clutch chatter usually occurs when engaging the clutch, it wouldn't happen when the clutch is engaged. It wont engage smoothly rather it will chatter causing the engine to vibrate. Hope this helps.
</TD></TR></TABLE>

Basically, I feel this when I am trying to maintain a certain speed. (cruise control doesn't work yet)

so I've got my foot on the gas, keeping it around 70 MPH in 5th. That is not the only time it happens, but generally I've noticed it at around 3600+ RPM.

My friend thinks it could be Injectors clogged or a bad O2 sensor.

 

My friend suggested cleaning the injectors and if that fails, checking the O2 sensor. Anyone feel like concuring?

 

your thinking you have clutch problems and your going to clean the injectors and check the o2 sensor?? im confused. well first off all if the car runs fine and idle and you can rev it at idle with no problem then your engine is runing fine. clutch chatter is when you first engage the clutch , its where the clucth first grabs then slips and grabs and slips alittle, this isn't very common on out preludes. but i have seen it on like older cars and school busses, but if you think you clutch is slipping there are soem tests you can do. you can try reving it up and poping the cltuch in first gear and if the tires break lose or you take off then the clutch is good, but if it just sits there and revs and you go no where or it slips then you know its the clutch. if your slipping then the revs should be going alittle higher and you should not be going much faster . a slipping clutch isn't that hard to mistake for anything else.

first find out if your clutch is having problems, call a local shop and ask then what the best way to test it, but im sure you would know, i sure knew when my way on its way out. but if it turns out not to be your clutch move on to engine problems

 

ive noticed with my clutch i swaped the motor in a year ago ...i put 30 000 miles on it and it still on the one that came with my jdm motor

but in 1st it used to just spin when i gave it gas ...put now it lages(doesnt slip)over the car feels slow.....i think the springs in the center hub are gone cause i get a pop when i engage into 1st gear......also a little bit of chattering in first

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by machine4321 &raquo;</TD></TR><TR><TD CLASS="quote">get a pop when i engage into 1st gear......also a little bit of chattering in first </TD></TR></TABLE>
i get some chatter when i try to take off from dead stop. BUT, when i worm up the car for 1-2min. and then drive, it's perfectly ok. how do you explain that?

 

Let's see, I described my problem to my friend and he said it's not the clutch, it's the engine is running lean for short periods, and that is what is causing the shuddering. He said it's either the component(injector) or the computer(because of bad data from O2 sensor).

That's where I got the injectors from.

As for the clutch, I have revved and popped into 1st, though I didn't intend to (newbie) and it did peel out a tiny bit and take off. I guess that means the clutch is fine.

I am gonna go buy the injector cleaner and give that a shot. My car was basically sitting for a month, I don't know how much that would effect the injectors.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BB1 &raquo;</TD></TR><TR><TD CLASS="quote">
i get some chatter when i try to take off from dead stop. BUT, when i worm up the car for 1-2min. and then drive, it's perfectly ok. how do you explain that? </TD></TR></TABLE>

Do you got a aluminum flywheel?

 

Just idling and revving the engine in neutral does not mean your engine is fine. Many times the engine has to be under load for a misfire to be present. Check your plug wires with an ohmeter. They should be no more than 1000 ohms per foot. Also check your plugs for carbon tracking, that would indicate a miss. Also if you have a clogged injector, I would suggest taking it to a dealer to have the fuel system cleaned with a Motorvac. This works extremely well in most cases. The injector cleaner additive you put in the gas tank may not work. Good luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ahnold &raquo;</TD></TR><TR><TD CLASS="quote">Just idling and revving the engine in neutral does not mean your engine is fine. Many times the engine has to be under load for a misfire to be present. Check your plug wires with an ohmeter. They should be no more than 1000 ohms per foot. Also check your plugs for carbon tracking, that would indicate a miss. Also if you have a clogged injector, I would suggest taking it to a dealer to have the fuel system cleaned with a Motorvac. This works extremely well in most cases. The injector cleaner additive you put in the gas tank may not work. Good luck!</TD></TR></TABLE>

Thanks a lot!
I'll post here again after this week with results from the addative, and I'll keep in mind your suggestion.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cottonwoodz &raquo;</TD></TR><TR><TD CLASS="quote">

Do you got a aluminum flywheel?</TD></TR></TABLE>
no. stock flywheel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pentaq &raquo;</TD></TR><TR><TD CLASS="quote">
There is a simple test telling you about the condition of your clutch: hit second gear and slowly go till 4000rpm and the floor the accelerator pedal. If it will pull hard then everything is OK else if rpms go high but car will not accelerate then you have a problem with your clutch.
pentaq</TD></TR></TABLE>


Oh and its not a bad O2 sensor trust me I know all too well how a bad O2 sensor affect the motor.......it doesn't!.......at least noticably and short term.