crusing rpm
From : news
Q: my 99 ram rpms increase about 300 to 500 and then drop back down while in cruse. it doesnt do it unless it is in cruse. 2 wheel drive 318 auto. 40000 miles any suggestions .
Replies:
From : Annonymous
my 00 qc 4.7 slt suffers the same problem only mine ranges from 125-250 rpm. on tue 21 oct 2003 112450 -0700 steve porter sporter@cet.com wrote try replacing the throttle position sensor. not that uncommon of a problem. easy to do yourself. if you have an auto zone store in your area you should be able to buy it there cheaper than from the dealer. had the same problem and that cured it immediately. .
From : gary glaenzer
more likely going in and out of converter lock-up my 99 ram rpms increase about 300 to 500 and then drop back down while in cruse. it doesnt do it unless it is in cruse. 2 wheel drive 318 auto. 40000 miles any suggestions is the road relatively flat youre probably going in and out of overdrive. jeff .
From : news
i dont feel any change of speed. just the engine speed increasing momentarily. it onlt happens when it is in cruse. my 00 qc 4.7 slt suffers the same problem only mine ranges from 125-250 rpm. on tue 21 oct 2003 112450 -0700 steve porter sporter@cet.com wrote try replacing the throttle position sensor. not that uncommon of a problem. easy to do yourself. if you have an auto zone store in your area you should be able to buy it there cheaper than from the dealer. had the same problem and that cured it immediately. .
From : nitpik
do you have the 5 speed auto it will downshift on slight inclines and increase the rpm about that much or more. i have 00 cc 4.7 with the 5 spd tranny and it is pretty sweet. also could be due to the torque converter locking/unlocking. my 00 qc 4.7 slt suffers the same problem only mine ranges from 125-250 rpm. on tue 21 oct 2003 112450 -0700 steve porter sporter@cet.com wrote .
From : news
yes 5 speed auto. i thought of the converter. ill probably have to have it hooked to a computer huh. do you have the 5 speed auto it will downshift on slight inclines and increase the rpm about that much or more. i have 00 cc 4.7 with the 5 spd tranny and it is pretty sweet. also could be due to the torque converter locking/unlocking. my 00 qc 4.7 slt suffers the same problem only mine ranges from 125-250 rpm. on tue 21 oct 2003 112450 -0700 steve porter sporter@cet.com wrote .
From : twixgary glaenzer
most service people are robots and parrots. no independant thought. they tried telling me everything is monitorwed by the computer but alas the tps is not. on sat 25 oct 2003 213502 -0600 d&d wheaton ddwheaton@look.ca wrote there is no service bulletin for this. it strictly a call dc in detroit. it took 5 calls to them before i ended up with this solution. i had this problem for 60k miles before it started throwing out codes and then those codes indicated a fuel injector problem. i would be extremely careful not to buy new injecotrs when offered when you get multiple injecor faults. if it is the same problem it will continue to get worse untill the pcm will eventually shut the engine down while your driving. first the tps will begin sticking and you will only notice this on cold starts. then the tps will begin floating while idlling and finally at throttle. the pcm tries to compensate buy injecting either too much fuel or cutting back because the engine wont stay on its programmed power curve. one way to find out... i live in a small town now and this works here but some of the bigger dealer in denver where im from will to this to the dealer here is willing to put on a new part for a trial. if it works good. if not the dealer will buy it back minus a small restocking fee 20%. its actually the highest restocking fee ive ever paid but theyre willing to work with me at least. i would just explain to the service manager/writer whats going on and what you want to do. if the technicians cant figure it out i offer the buy the part see if it works and sell it back if it doest solution the service manager. especially if theyve had you truck for this problem before. the last two times i had the shop hours dropped off the bill. give it a try. let me know how it goes. i imagine your cost for a tps would be reletively small.. wrote twix i have the same high rev when cold problem as mike i have a 2000 dakota auto with 3.9 l engine i just bought and am trying to figure this out.. do you know if chrysler has a service bulletin out on this so i can have the dealer read it they tell me it all checks out ok thanks don w ok thanks twix kinda funny though i had the truck in the other day told them what it was doing and i thought it was the tps and they said they couldnt find a problem but it hasnt done it since it came home before it always did it cold . whats upwith that.. nefer no with those service dept eh. .
From : jeff mayner
my 99 ram rpms increase about 300 to 500 and then drop back down while in cruse. it doesnt do it unless it is in cruse. 2 wheel drive 318 auto. 40000 miles any suggestions is the road relatively flat youre probably going in and out of overdrive. jeff .
From : willywanka
the road is flat it has even happened on a slight downhill. what would cause the converter to lock and unlock more likely going in and out of converter lock-up my 99 ram rpms increase about 300 to 500 and then drop back down while in cruse. it doesnt do it unless it is in cruse. 2 wheel drive 318 auto. 40000 miles any suggestions is the road relatively flat youre probably going in and out of overdrive. jeff .
From : jeff mayner
more likely going in and out of converter lock-up yeah! what you said. ;- jeff my 99 ram rpms increase about 300 to 500 and then drop back down while in cruse. it doesnt do it unless it is in cruse. 2 wheel drive 318 auto. 40000 miles any suggestions is the road relatively flat youre probably going in and out of overdrive. jeff .
From : gary glaenzer
bad tps is usual culprit it develops a bad spot right where it usually rides at cruising speed and the ecm interprets it as wide-open or closed throttle and unlocks converter the road is flat it has even happened on a slight downhill. what would cause the converter to lock and unlock more likely going in and out of converter lock-up my 99 ram rpms increase about 300 to 500 and then drop back down while in cruse. it doesnt do it unless it is in cruse. 2 wheel drive 318 auto. 40000 miles any suggestions is the road relatively flat youre probably going in and out of overdrive. jeff .