Surging power on the highway

1,725

Asked by Jun 07, 2013 at 09:48 PM about the 1999 Toyota Camry LE V6

Question type: Maintenance & Repair

While on the highway at a steady speed and constant throttle pressure the car will all of a sudden act as though additional power is available and will start gaining speed.  Then a minute later just as suddenly it will 'turn off' and lose that slight boost.  The RPMs do not change.

7 Answers

246,855

RPM's don't change, hmmm. Could be a sticky throttle body plate or cable, maybe the cruise cable? Clean those parts up, they might just be dirty. Maybe it could be the transmission torque convertor slipping, But until it gets worse, it will be hard to diagnose with the description you gave us.

1 of 1 people found this helpful.
1,595

Are you perhaps switching between in/out of overdrive by resting you hand on the shift lever? There is an instrument panel light to show if you out of overdrive. There is a button on the shifter to toggle overdrive on and off. So, for example if you need to climb a long hill, it is better to turn overdrive off so you have the torque you need to do that smoothly. In other situations have overdrive ON for best gas mileage. Good Luck HTH

1,195

Could be the computer changing timing due to knocking, but it's not bad enough to throw a check engine light. May want to try some better gas or a can of Sea Foam in the tank to clean the engine and fuel system out a bit. Might also be a dirty fuel filter, 1999 it's about that time...

1,725

I currently put Cenex 89 octane in her. And no I'm not pushing overdrive, the 1MZ has plenty of torque to get up big hills without downshifting anyway its quite nice. I use a fuel additive once a month or so and oil additive with MaxLife blend on a 5000 mile interval. The throttle body is clean and it has fairly new spark plugs. The transmission fluid was changed not too long ago as well (it shift normal) not velvety like a new camry but much better than my old Jeep, and the torque converter always locks at about 42 mph, it does shudder very slightly (very few people would notice) when it unlocks from 4th under acceleration but i consider that quite normal? Im extremely adamant about using my emergency brake before putting it in park. The engine doesn't knock. It also has a new PCV valve. Im wondering if it could be related to the EGR valve?

1,195

Is it the A/C compressor kicking on?

2 of 2 people found this helpful.
1,725

No, its not that often.. and id say whenever it happens its a good 15% power increase

1,195

I would try 4 quarts of Royal Purple Max ATF for the torque converter issue, and you will get that velvety back. If you've had a filter put in not too long ago, I'd drain the transmission oil pan and measure what you took out. An old 5qt oil jug is handy for this. Should be about 4 qts though. No codes though? Also the only fuel additive I would trust is Sea Foam. It's made from Pale Oil, Naphtha, and Isopropyl alcohol.

Your Answer

Add photo

Related Questions

Camry

Looking for a Used Camry in your area?

CarGurus has 83,224 nationwide Camry listings starting at $750.

ZIP:

Search Toyota Camry Questions

Toyota Camry Experts

#1 Reelin68
Reelin68
Reputation 13,060
#2 Tom Demyan
Tom Demyan
Reputation 4,520
#3 tenspeed
tenspeed
Reputation 2,980
View All

Related Models For Sale

Used Honda Accord
1,033 Great Deals out of 67,106 listings starting at $1,000
Used Toyota Corolla
947 Great Deals out of 68,804 listings starting at $1,800
Used Honda Civic
824 Great Deals out of 83,792 listings starting at $750
Used Nissan Altima
1,268 Great Deals out of 74,639 listings starting at $1,000
Used Toyota Avalon
244 Great Deals out of 14,397 listings starting at $1,149
Used Toyota RAV4
869 Great Deals out of 63,403 listings starting at $1,988
Used Hyundai Sonata
1,068 Great Deals out of 47,476 listings starting at $1,195
Used Nissan Maxima
331 Great Deals out of 24,189 listings starting at $1,999
Used Honda CR-V
954 Great Deals out of 56,333 listings starting at $1,000
Used Chevrolet Malibu
1,176 Great Deals out of 79,465 listings starting at $2,500
Used Toyota 4Runner
231 Great Deals out of 19,232 listings starting at $2,195
Used Toyota Tacoma
549 Great Deals out of 42,548 listings starting at $1,995

Used Cars For Sale

2018 Toyota Camry For Sale
4,774 listings starting at $19,712
2017 Toyota Camry For Sale
48 Great Deals out of 41,321 listings starting at $14,000
2016 Toyota Camry For Sale
166 Great Deals out of 6,518 listings starting at $11,995
2015 Toyota Camry For Sale
155 Great Deals out of 5,142 listings starting at $9,988
2014 Toyota Camry For Sale
337 Great Deals out of 8,449 listings starting at $7,700

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.