Ok, i have had the well known power suring when on the highway off and on for some time.

And today on my way home i just happened to figure out what it was. I was driving along fine and no surging. Then i went to change lanes and noticed that it was surging when i was but after i was done i looked at it and it had stopped.

So later I did the same thing. Well after the 3rd time i thought something is funny and turned on my blinkers, and sure enough my engine starts surging in tune to the blikers. I don't have a clue how this could be happening but it sure was doing it.

Turn the blinkers on = Instant Surging

Turn them off = Runs like normal

I am totally lost as to how this could even happen much less where to look. Any ideas?

 

Did you check the fluid in your turn signals? Mine was very low once and as soon as I topped it off....no more surging. I used Toyota OEM synthetic turn signal fluid.....

 

Hmm, i might need to do that, though i prefer this stuff:



Back on topic. lol

 

Electrical wiring upgrade...

 

Yeah, but want to tell me how to go about that?

I have a few other eletrical querks that make no senes on mine as well from time to time.

 

Big 3 wire, alt, battery and starter?

 

Yeah, i plan to do that when i install the SC but could that be causing this problem??

 

I've seen some electrical problems appear from the little wire (from the NEG terminal to the inner fender) being broke.

 

I know that is not the problem as i already have a beefed up wire there (had some extra when i installed my radio and put it there). But i guess it not be tight or something, i will look at it.

 

i have never noticed surging while driving, but i have at idle. in park, neutral, or drive as the rpms drop lower(to about 5 or 600) it automatically gives it gas and jumps to 1500. I think the ecu is telling it to do so because of power consumption so it raises the rpms to spin the alternator faster....or somethings broken =/

 

Well my idle is fine (a little low but fine).

When looking at my OBD scanner i noticed that my TPS is showing 12% = 15% when my foot is not on it at all, and only goes to a max of 75% when i am down to the floor.

Don't know if that is the way it is meant to be or if that could be a problem?

 

I'll check mine and see what its doing next time I drive it (maybe today).

 

That would be GREAt, i have a few other problems that could be related to the TPS if it is bad.

 

Mine shows 9% foot off the pedal and a max of 70 something % I think it was at WOT. It was hard to tell because I can't stay at WOT very long in traffic.

 

Well then i guess that is normal, though it seems odd that it would not show the real values.

As for the WOT, i did mine with the engine off, that way i could do it all day and not have a problem lol.

Thanks for the info!

 

Yeah that seems weird. I didn't know it would show up with the engine off, learn something every day.

 

Yep, with the key on and the engine off all the sensors will show up, most are just not working due to the engine not running.

 

Check the grounds on the side of the intake by the diagnostic port. Mine were loose and created the weirdest symptoms then eventually quit running.

 

I don't remember any ground on the intake? Where exactly is this?

 

On the driver side there is a diagnostic port bolted to the side of the upper intake. There are 3 or 4 wires bolted right by that box tot he side of the intake plenum