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what is an ECT?

Discussion in 'The Garage' started by bigbadchev84, May 14, 2006.

  1. bigbadchev84

    bigbadchev84 1/2 ton status

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    my mom has a 1990 toyota 4runner 4wd v6 and it is running like crap and the ECT light in the dash is staying on, what is it?
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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    maby engine colant tempature
     
  3. bigbadchev84

    bigbadchev84 1/2 ton status

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    yeah i did a little searching and found that.......how do i test to see if it is bad?
     
  4. 1979jimmy350

    1979jimmy350 1/2 ton status

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    take the wire off the sending unit and ground it, if the gague reads a really high temp it is the sender of not you might have short in the wire or dash
     
  5. bigbadchev84

    bigbadchev84 1/2 ton status

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    is the ect light in the dash actually to tell you if the temp gauge in the dash is bad or is it for the injection? if for the injection it would probably explain the crappy starting after it is warmed up and it smells really rich out of the exaust. can someone please clarify for me what this light is on for?
     
  6. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    The ECT light on the dash is indicating that the ECT switch is turned on. You will find an push button switch on either the dash or center console (can't remember where on a 4Runner) clearly marked "ECT". Think of it as sort of a "Power/Normal" type switch, having it on will change the tranny shift points slightly (I've also been told timing is advanced some) to create the illusion of more power.

    Don't worry about the engine coolant temp, this is NOT related. Your owners manual should also cover the ECT operation.
     
  7. mxfireman

    mxfireman 1/2 ton status

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    ya what he said. only I noticed a difference while using mine. I used mine while towing more weight than I should have......:D
     
  8. bigbadchev84

    bigbadchev84 1/2 ton status

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    ummmm..........that light was never on before, she has owned it over a year and it just came on today, what is it for? it has no manual with it
     
  9. fabjunkie

    fabjunkie 1/2 ton status

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    x3 I think the button is on the shifter on the 4runners.
     
  10. bigbadchev84

    bigbadchev84 1/2 ton status

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    ok well i guess i still need to troubleshoot this thing, starts awesome in the mornings, after it has been driven it is hard to start, just cranks then finally fires, with lots of blacksmoke out of the exaust, i know it is running rich plus it is getting horrible fuel mileage like around 8mpg. dosent have much power either. so what are the 1st few things i should check? sensors, etc, also how would i go about checking them?
     
  11. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    To begin with, check the "cold start time switch" and the "cold start injector". :wink1:
     

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