bluto00

Hi NTX5467, Again thanks for the help guys. As I stated I only drove this once but it seemed to me that at about 55 mph I held the gas pedal steady to engage the coast down. The rpm's dropped normally like in my '91 and it seemed to me that the shudder started at that time. I will have to check with him to be positive on that though. When I accelerated it seemed to stop the rough running/shudder. I also put the car in lower gears and I didn't "seem" to have any problems after that. At the time I believe that the rpm's were around the levels on my '91 which is about 1200 rpm's when the problems started. What would the test be for the throttle body IAC motor? I will have to wait until I see him again to test the mounts as you stated. I will set my son up with this forum and maybe he can answer some of the questions. Thanks, Clark

Hi Tim, Thanks for the help. As to the miles I will guess and say around 150K. The symtoms do not seem to be effected by the engine being warmed up or not. I only test drove it once and I really can't tell you whether braking changed the vibration. Off the top of my head I will say it did not but I will check with my son on this. Thanks, Clark

Hi Rivieraman, Thanks for the response. In answer to your question I did not check the EGR Valve. I will have him check this as soon as I talk to him next (I live in Iowa and he is in Wisconsin) and replace it. I am not sure I understand about the computer behind the glovebox. Is this safe pulling my chip and putting it in another year auto? Also what am I looking for by doing this? Thanks, Clark

Hi all, My son has a '92 Riv (mine is a '91) and is having some problems. When the engine RPM's normally drop back while going into the "*coast down" mode on the highway, the car starts to shudder mildly. It is similar to when driving a stick and the gear is too high for the speed of the car. The steering wheel shakes and all that good stuff. When stepping on the accelerator to get out of this mode it seems to stop shuddering. Just replaced plugs and wires in his car a few months ago so that shouldn't be a problem. The tranny fluid is not low. No Codes have been tripped and the Service Engine Soon light has not come on. Can anyone give me some idea's what to check or where to start? Thanks, Clark *When driving on the highway with a steady accelarator the RPM's normally drop like going into an overdrive mode.