Surge on 1997 sr5 5 speed

[dc52317]

Hello,

My 1997 5speed 4 runner just started to do this odd surge. I notice it most in 4th gear at about 35-40. I will shift through the gears get up to speed let off gas. When I gently accelerate it surges like it loses power or slips. I have experienced this surge in all gears but seems that I feel it most in 4th and 5th after reaching speed and then slightly pressing on gas. It is a double pulse/surge then it is gone.

Any ideas? Is this driveline or engine?


Thanks for any help

 

[techno]

Sounds like an air or fuel delivery issue to me. I would suggest running through all the easy general maintenance items first, like checking the air filter etc. Also, try running an injector cleaning additive in your next tank of gas.

 

[dc52317]

reply

I was going to start with cleaning maf per instructions I found on this forum, and I will add some techron to the tank. Thanks for the input

 

[J-money$$$]

I'm not shure that you should be in 4th gear at 35 to 40 mph. That seems a little too slow for that gear. I have the same 97 with a 5speed and I use 4th about 45 to 50.

 

[dc52317]

Speed was estimate

I will double check the speed, probably a little faster, I just know this just started to happen, and my driving habits have not changed so if to low of rpm shutter was the issue I would have had for the past 6 months I have owned the truck.

 

[dc52317]

GOT A ENGINE CODE P0120

Any one know what TPS/Pedal position sensor malfunction

 

[J-money$$$]

I'm not shure that you should be in 4th gear at 35 to 40 mph. That seems a little too slow for that gear. I have the same 97 with a 5speed and I use 4th about 45 to 50.

 

[J-money$$$]

I'm sorry for the doubble post

 

[dc52317]

No problem

Checked speed through gears in 4th at 40 and up. The check engine light came on, and i used my reader and got a P0120 which says TPS/Pedal position sensor malfunction. So I will see if I can solve it with new TPS sensor.

 

[dc52317]

FIXED the problem

Well after a code for the TPS sensor showed up I decided to go ahead and replace. 140,000 miles + and old one was original so I figured this would not hurt and cheap.

I also cleaned throttle body, MAF, and put in a new air filter even though mine was not that old.

I have not seen any of the symptoms back I was having before.

I plan on replacing spark plugs also after i check records to see when they were replaced last.

Preventive work.