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Revs to 4000 rpm but wont do more than 20 mph

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Sporatic rpm increase at 2000 rpm (increases to 4000 by itself)

change tranny fluid with mercon v also can add friction modifier (ford part# m-19546-a) and be sure to drain torque converter as well. should fix ya

Posted on Sep 04, 2009

  • 118 Answers

SOURCE: transmission is not shifting properly on my 2000

You could have a bad valvebody in your transmission or a bad pump in your transmission or your clutches are bad. In any case you have a bad transmission. Please rate my answer.

Posted on Nov 17, 2009

  • 1 Answer

SOURCE: will not accelerate wont even rev past 3500 rpm's

i have a ford fairmont 95 ef that rattles when i accelerate sounds like chains on a bike clunking and wen i put my foot down it wont revv any higher than 3500 rpm and keept jerking about like it was tryna risist going faster and before u ask me yes the car was in drive so it wasnt because i forgot to change gear if any one can help me as to wat the problem might be it would be very much appreciated

Posted on Dec 15, 2009

  • 10 Answers

SOURCE: i have 2006 scion xb and when driving the rpm

3500 is about normal for an xb at 65 mph. My previous ride was a pickup and rolled at about 2000-2500 on the highway. But the XB's engine is way more "tightly wound". Your rpm gage should run at about half of of your speed...ie: 70 mph will be about 35 (3500) rpm, 80 mph will be about 40 (4000) rpm. Freaked me out when I first got the thing, but after researching it Ive found out that with a stock engine it actually runs more efficient at the higher RPM's. The 06 boxes won't redline until 6000 rpm, so unless you are driving 120 on a frequent basis you're good. You can probably have it modified to run lower, but you will lose the awesome gas mileage and overall it is not going to improve the way it runs, and would have no benefit............

Posted on Jan 15, 2010

  • 310 Answers

SOURCE: 03 yukon with 125000 miles wont shift into 3rd

yes but you can get it less becauses the kit cost only 72 to220$ for it and its a half day labor onit any ? you can call 863 261 6116 if no answer leave a message

Posted on Feb 26, 2010

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At 4000 rpm what does your speedo say. Your computer may be limiting both your mph and your rpms. I have a 2004 Ford Ranger at 90 mph the engine sputters and seems to miss. It will stay at 90. In neutral it revs fine. My problem is because of chip programming in the computer. Your problem may be the same.

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Runs rough under load ,stalls and won,t free rev over 4000 rpm. Acts like rev limiter kicks on.


Hi

one of 3 faults

1 MAF sensor also Known as air mass sensor
2 EGR valve, this is most common with the 4000 rev limit and a top speed of say 50 mph
3 air leaks or tears in air pipes or poor seals.

I would be tempted to clean both the EGR and MAF sensor before spending any money though, these parts ofetn work much lonegr when clean

Regards

Dan

need more info get back to me

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to me it sounds like the trans computer the trans computer is built into the main computer for the engine i would try that the local junk yard should have one

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Transmission is not shifting properly on my 2000 nissan frontier 2wd pick up, auto It revs at 3-4000 rpm instead of a nice consitent 2000rpm, revs real high and doesnt change gears intill 20 mph, it doesnt...


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In neutral car is not going more then 4000 rpm


The 300M is equiped with a rev-limiter. The technology is designed to protect the engine. It keeps you from blowing it up when it has no load on it...If it is driving and shifting ok, and you have no check engine light on...there is nothing wrong.
Why would want to rev the engine past 4000 rpm in neutral anyway? Max torque comes in around 3950 RPM...
If you keep reving it up in neutral you might throw the computer in to LIMP mode, then you wont go no where.
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Engine revs up to 3000-4000 rpm all by itself


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