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Engine shaking and thumping during reving #1069365 10/05/04 12:42 AM
Joined: Mar 2004 Posts: 70 Cincinnati, OH N nimrod_dup1 OP CEG\'er
OP nimrod_dup1 CEG\'er N Joined: Mar 2004 Posts: 70 Cincinnati, OH	When I rev my engine, it will get to a certain point and then just go vroom-vroom-vroom-vroom-vroom-vroom-vroom-vroom-vroom-vroom-vroom and the actual engine in the engine bay will jolt back and forth with the noise. This is happening when I barely have the gas pedal pushed down. Any ideas what is happening? The engine seems to run fine when driving normally.

Re: Engine shaking and thumping during reving #1069366 10/05/04 02:04 AM
Joined: Mar 2004 Posts: 70 Cincinnati, OH N nimrod_dup1 OP CEG\'er
OP nimrod_dup1 CEG\'er N Joined: Mar 2004 Posts: 70 Cincinnati, OH	Any ideas?

Re: Engine shaking and thumping during reving #1069367 10/05/04 03:08 AM
Joined: Jul 2002 Posts: 4,714 Grafton, WI H hetfield_dup1 Scourge of the Master Debaters
hetfield_dup1 Scourge of the Master Debaters H Joined: Jul 2002 Posts: 4,714 Grafton, WI	ATX or MTX? Beer is my Gatorade. Hooray Beer. '98 "Sport" Pacific Green '98 E0 SVT Silver Frost Pictures

Re: Engine shaking and thumping during reving #1069368 10/05/04 10:16 AM
Joined: Mar 2004 Posts: 70 Cincinnati, OH N nimrod_dup1 OP CEG\'er
OP nimrod_dup1 CEG\'er N Joined: Mar 2004 Posts: 70 Cincinnati, OH	I have no idea.

Re: Engine shaking and thumping during reving #1069369 10/05/04 10:54 AM
Joined: Sep 2002 Posts: 1,788 St. Louis, MO P projectSHO89_dup1 Hard-core CEG\'er
projectSHO89_dup1 Hard-core CEG\'er P Joined: Sep 2002 Posts: 1,788 St. Louis, MO	If it's an automatic (ATX) and you're getting that around 4K RPMs, it is normal. You're hitting the rev limiter and the computer is keeping you from doing something stupid, like blowing up the torque converter. Steve 98 Contour SE Sport 2.5 Duratec ATX The wifey's car 89 Taurus SHO - 246K miles 94 SHO ATX - 190K 1997 F-150 5.4L ATX - The Workhorse 150K. ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!

Re: Engine shaking and thumping during reving #1069370 10/05/04 12:44 PM
Joined: Mar 2004 Posts: 70 Cincinnati, OH N nimrod_dup1 OP CEG\'er
OP nimrod_dup1 CEG\'er N Joined: Mar 2004 Posts: 70 Cincinnati, OH	I have an automatic, but I have never seen this on any car before. I don't have a tachometer so I don't know how many rpm's I'm doing. The engine barely revs before this happens.

Re: Engine shaking and thumping during reving #1069371 10/05/04 03:35 PM
Joined: Aug 2002 Posts: 80 Houston, TX P Pick_dup1 CEG\'er
Pick_dup1 CEG\'er P Joined: Aug 2002 Posts: 80 Houston, TX	Get your motor mounts checked out. If they have cracked or broken it will definetly cause shaking under load. "Not a newbie" Been here since it all started!! 98 silver SVT Contour several mods and counting www.pickettperformance.com "Remember, you're part of the human race, try not to embarrass the rest of us"

Re: Engine shaking and thumping during reving #1069372 10/05/04 04:07 PM
Joined: Jun 2002 Posts: 652 Washington J Josch_dup1 Veteran CEG\'er
Josch_dup1 Veteran CEG\'er J Joined: Jun 2002 Posts: 652 Washington	Originally posted by nimrod: I have an automatic, but I have never seen this on any car before. I don't have a tachometer so I don't know how many rpm's I'm doing. The engine barely revs before this happens. Projectsho89 is right on. Rev-limiter while in park or neutral is set very low (4000 rpm). When in drive the computer sets it at the normal limit (maybe 7000 rpm or there abouts- don't know exact hi-end limit) '95 CONTOUR SE -Enkei 16s -SVT wannabe -Dual escapes w/ 2 1/2" stainless tips -True LED taillight conversion -Audi Xenon Projector Retrofit -Mp3 deck, dual 10s

Re: Engine shaking and thumping during reving #1069373 10/05/04 05:10 PM
Joined: Jul 2002 Posts: 4,714 Grafton, WI H hetfield_dup1 Scourge of the Master Debaters
hetfield_dup1 Scourge of the Master Debaters H Joined: Jul 2002 Posts: 4,714 Grafton, WI	I agree. I remember testing my IMRC and hitting the limiter. I pulled open the throttle too quickly and I was almost instantly vroom-vrooming. And yes, the engine does bounce back and forth quite a bit when you do this. If that is what you're experiencing (mostly likely since you're not having any other problems) its a safety feature designed to protect the torque converter from overheating, as projectsho mentioned. Last edited by hetfield; 10/05/04 05:10 PM. Beer is my Gatorade. Hooray Beer. '98 "Sport" Pacific Green '98 E0 SVT Silver Frost Pictures

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