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| Author: | nytehawk [ Tue Dec 06, 2016 10:40 am ] |
| Post subject: | rpm's too fast |
When I accelerate rpm's go to 3500 at 45mph should be around 1500 and keep increasing more as I accelerate but rpm is normal when idling. What's happening? |
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| Author: | tjkj2002 [ Tue Dec 06, 2016 10:47 am ] |
| Post subject: | Re: rpm's too fast |
Sounds normal to me,the rpm's should increase as your accelerating. |
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| Author: | WWDiesel [ Tue Dec 06, 2016 11:06 am ] |
| Post subject: | Re: rpm's too fast |
nytehawk wrote: When I accelerate rpm's go to 3500 at 45mph should be around 1500 and keep increasing more as I accelerate but rpm is normal when idling. What's happening? Welcome! What vehicle do you have, year, motor, transmission, etc... You can add this info to your signature and it will provide others with helpful information with any future postings, questions, etc...! 
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| Author: | nytehawk [ Tue Dec 06, 2016 8:53 pm ] |
| Post subject: | Re: rpm's too fast |
The too fast rpm's are on a 2003 Liberty Renegade with 3.7 liter 6 cyl. |
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| Author: | nytehawk [ Tue Dec 06, 2016 8:56 pm ] |
| Post subject: | Re: rpm's too fast |
It's also an auto trans with high low 4wd but so far it's only doing it in 2wd. Thanks |
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| Author: | JeepinJarhead03 [ Tue Dec 06, 2016 10:28 pm ] |
| Post subject: | Re: rpm's too fast |
is it up to operating temp when it does this? |
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| Author: | papaindigo [ Thu Dec 08, 2016 10:57 am ] |
| Post subject: | Re: rpm's too fast |
Engine rpm is a function of speed and the gear you are in. Under "normal" acceleration, at least on the CRD with automatic, the rpms will rarely go above 2,500 unless you have manually set the gear selector to 1 or 2 instead of D. However, under hard acceleration your rpms could easily exceed 3,000 and increase until the transmission "up" shifts again unless up shifting is overridden. Questions: 1. do the rpms drop back to normal once highway speed, say 65, has been reached? 2. what is the rpm at 65? 3. in fact what are the rpms at the various shift points, you should be able to feel the shifts? 4. what's the vehicle mileage and when was the transmission last serviced? 5. have you only used ATF+4 in the transmission and what's the fluid level? 6. does it do this all the time or only on cold starts? |
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