What causes high RPMs at low mph?

5

Asked by May 14, 2011 at 09:54 AM about the 1991 Mazda 626 LX

Question type: Maintenance & Repair

Car shifts at 20 mph but RPMs are around 2000.  Car shifts at 35 mph but RPMs are between 3500 -4000 rpms.  Car used to shift at 30mph.  Letting up from accelerator allows car to shift sooner but it shifts a little harder.  Two tranny shops have told me that it's something w/ the engine that's causing it to shift later than 30 mph.  They have told me that the transmission itself is fine, all of the gears work fine.  It was suggested by two engine shops that it may be something inside the throttle body or the idle air control valve.  However, each shop had a different suggestion, not both suggestions.  The throttle positioning sensor has been replaced in Jan 2011.  At one point (after the tps was replaced) I was driving 55 mph & the RPMs dropped from 3500 to 2000 and back up again.

2 Answers

5

has anyone actually checked tranny oil level? thats where my money is.

5

Yes, mine is clean and didn't need any added. The tranny fluid was looked at by both tranny shops.

Your Answer

Add photo

Related Questions

Search Mazda 626 Questions

Mazda 626 Experts

#1 littlehorn
littlehorn
Reputation 390
#2 tropikalpirate
tropikalpirate
Reputation 270
#3 lightGear
lightGear
Reputation 220
View All

Related Models For Sale

Used Honda Accord
830 Great Deals out of 85,684 listings starting at $988
Used Toyota Camry
1,019 Great Deals out of 90,645 listings starting at $650
Used Toyota Corolla
769 Great Deals out of 73,008 listings starting at $1,995
Used Mazda MX-5 Miata
49 Great Deals out of 4,229 listings starting at $1,995
Used Mazda Protege
252 listings
Used Honda Civic
653 Great Deals out of 89,883 listings starting at $1,299
Used Nissan Maxima
308 Great Deals out of 25,082 listings starting at $999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.