rpms

...mph.whats going on? this only happens once in a while, but sometimes when coasting along at about the 45 to 55 mph range the rpm odometer will start rising and falling about 300 rpms.you can feel it drive all jumpy like youre rocking back and forth like its engaging and stopping erratically...

Car did something weird to day: after starting rpms went up and down between 1000 & 1500...what is wrong? I went to start my car (motor was warmed up already from earlier driving) and right after it started the RPMS slowly went up and down between 1000 and 1500 (making small revs everytime it...

I have a 5 speed Nissan Xterra. I've been told conflicting advice. One person says to drive it in a gear where the rpms are high and the other says it's better to drive it in a gear where the rpms are lower. Example - if I'm driving 45 miles an hour should I be driving in 4th where the rpms...

Its been going on for awhile, I put a brand new catalytic converter on it, new cat back exhaust. Took all the exhaust shield off, except for the shield on my header. I have no clue what it might be, but I would appreciate it if some could let me know if they have experienced the same problem, if...

changed the thermostat still hot? I changed the thermostat, still getting hot. While ideling runs great. Start driving, as the rpms get up engine gets hot.

I have a 1997 Jeep Grand Cherokee and when I come to a stop (idle), my RPMs keep dropping to where it almost makes the car die. Does anybody have any clue what could possibly be wrong?

Any ideas on my problem? My 2 front tires were stuck in the snow for about 1/2 an hour before this. Nothing really bad was done.

i have a 96 dodge 1500 and when you slow down to take corners and stuff it steers like there is no power steering, you have really pull on the wheel, i checked the power steering fluid its good, at first i thought it was the pump but it doesnt do it all the time just sometimes with low rpms

it seems to pull back when i hit 5000 rpm. but it only does it sometimes not all the time. any ideas of what it might be?

...up but upon releasing ? the gas it acts like it wants tio die. The car was bucking and shaking today while driving. I was thinking battery cables were the problem but they seem to be fine. Any advice is appeicated. Please help!

...2nd to 3rd, 3rd to 4th etc...? its a new bike does it matter?