I shift to 4th gear at around 10mph and the revs falls to around 1k ( this is from memory might try again later ), and step on the gas. The engine felt like it does not have enough strength to pull up and there is this vibrating motion on the gear stick + some vibration noise, the feeling is like the car is about to stall. But when the revs rise above 2k rpm eveything is ok and engine rev smooth as usual.

Can someone help a newbie here?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by voofee &raquo;</TD></TR><TR><TD CLASS="quote">I shift to 4th gear at around 10mph and the revs falls to around 1k ( this is from memory might try again later ), and step on the gas. The engine felt like it does not have enough strength to pull up and there is this vibrating motion on the gear stick + some vibration noise, the feeling is like the car is about to stall. But when the revs rise above 2k rpm eveything is ok and engine rev smooth as usual.

Can someone help a newbie here? </TD></TR></TABLE>

what car is this? mustang v8?

i never drop revs below 3K on itr

4th gear for 40-50mph.. somewhere around that..

(it may drop to 2.5k.. but thats about as low as i let it go in other than 1st gear)

 

umm.. why are you shifting to 4th at 10mph? thats your problem. end of thread

 

4th at 10mph!?

 

Why you do that?

 

Seriously, there is no point being in 4th at 10 mph. I had to read your post a couple of times because I thought there was a mis-type.

The revs should never be that low in any gear above second. I have heard of people babying their R's by not going above 3000, but holy **** man 1000 RPM???

I hope you know that your car must be revved up once in a while to keep it healthy. The way you treat your car is actually hurting it, and wasting gas. How do you even get anywhere on the freeway?

 

our cars have no torque, shift higher at around 4-5k for the first 2 gears. i usually dont get into 4th until 45mph or so. you wont get this problem if you do that.

 

I did it just for detonation testing purpose, I don't normally drive like that.

 

well we gave you the answer.. thats not detonation.. that's dumb driving.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jonas &raquo;</TD></TR><TR><TD CLASS="quote">well we gave you the answer.. thats not detonation.. that's dumb driving.</TD></TR></TABLE>

i agree

 

u should be driving auto or not driving at all.

 

how do u test for detonation then?

 

Why are you testing for detonation? Is your car boosted. Tell us your set up and we will tell you if there is any remote chance you are detonating. The test you did is for cltuch slippage but there are far better ways of testing for that too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by voofee &raquo;</TD></TR><TR><TD CLASS="quote">how do u test for detonation then?</TD></TR></TABLE>

i guess read your spark plugs, make sure your timing and ignition components are withing service limits

just don't push full throttle at rpm at low rpm - you'll end up with more mess..

 

Car is basically stock with intake and muffler mod and timing at 18. I read in previous posts that u got to run high gear at low rpm to listen for detonation, but how low is low rpm?

Anyway it is ok if the situation I mention is not detonation, but can someone confirm?

 

floor i on the freeway at 50 mph. If you don't hear any rattles, you're fine.

Why are you looking for something that most likely isn't there????

If it WAS there, you would know

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jonas &raquo;</TD></TR><TR><TD CLASS="quote">well we gave you the answer.. thats not detonation.. that's dumb driving.</TD></TR></TABLE>

Actually, its both. You will detonate(ping) flooring the car in 4th at 10mph.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITR#132 &raquo;</TD></TR><TR><TD CLASS="quote">

Actually, its both. You will detonate(ping) flooring the car in 4th at 10mph. </TD></TR></TABLE>

True, but why are you testing for detonation though especially with your current set up?