"eco" and "pwr"

[daywalker]

hi guys.as long as you know i have an AE86.the engine is 4age 16v blue top.but there is a problem about it.we start the engine.nice idle.the "eco" light is on as it should be.but when we start to drive the car and push the throttle to the end the car cant get to "pwr" mode.it stays on the eco.so the car cant have the power that it should.as a result of this we cant accelerate like a 4age but like a 1.4 civic... i believe that the main problem is that "eco" & "pwr" stuff. the car cant get to pwr so it cant get enough fuel or air.it seems like the air/fuel ratio is not right.

so as a result i need to check the cables which are related with that "eco" and "pwr" thing. does any one know which cables are they? thnx

[Jousi]

I believe it is not same problem, economy light just measure vacuum pressure in the manifold and lights the "power" light when vacuum drops, like on the moment when throttle flap opens wide or when engine is strained heavily.
The sensor is on the right side of the engine bay, on the strut tower. There goes one little hose from intake manifold and one wire. If you put the wire straight to ground, if i remember right, the "power" light goes on.

[robokill]

.... tear it off. the whole eco and pwr is bullshit. Measures on the intake manifold. Near teh throttle boddy

[Mikzu IV]

robokill Wrote:.... tear it off. the whole eco and pwr is bullshit. Measures on the intake manifold. Near teh throttle boddy

Hey. I like my eco/pwr light, don't call it that way :wink:

if you take of the vacuum pipe from the sensor, the pwr light should light up, there is also a little air restrictor in the vacuum pipe,

[banpei]

robokill Wrote:.... tear it off. the whole eco and pwr is bullshit. Measures on the intake manifold. Near teh throttle boddy

It's not bullshit: when it's on it will restore the rainforest! So never push your car to pwr!!! >

Seriously: my hachi had the same problem. The eco/pwr light did not change and that was probably due to the vacuum sensor being faulty. Nothing serious and my engine ran just fine.

The butterflies are operated seperately (so not the same system!) through the ECU. The ECU gives the signal to the vacuum valve under the butterflies and the valve opens the butterflies.

Ofcourse it could be that both of them are broken.

[daywalker]

first of all my car is not a at.it has always been mt =) what eve i have found some videos =) the first one shows "how should it be"

http://au.youtube.com/watch?v=23TmzlqKVhA

the second one shows "how is mine" the second one has some engine else i think but it doesnt matter i m caring about the eco pwr light =)

http://au.youtube.com/watch?v=...lated

[max_ae86]

As far as I know, pwr & eco vacuum sensor has no influence on engine and ECU. I’m running my car with out it and it works fine. I have noticed that some additional vacuum is running thru the sensor, so I removed it. Now the green light is always on. Also I have removed old rusty EGR pipe, vacuum hoses and valve. Not a big deal. Engine is running just fine.

[Jousi]

In the first video, driver "hit the pedal to the metal" so the power light goes on (cause of pressure changes in the manifold) and car star to accelerate.
Ecu does not got any signals from the economy light, or maybe if there are some d.i.y-wirings .