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All injectors are open and firing

  • nathan.brook
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31 Jul 2019 02:05 #32327 by nathan.brook
All injectors are open and firing was created by nathan.brook
I have a 1992 Lexus es300, car smokes, fuel coming out of exhaust, power loss sputter and shakes, very very bad gas mileage <15/half tank. This problem was solved when I changed the ECU right after I bought it. With that I changed all injectors, cat, spark plugs and wires, air filter, pcv valve, intake gasket, cleaned throttle body....

Car ran fine almost for a whole year and just started having intermittent smoking and shaking a while ago and now it's undrivable because it uses toooo much gas and has almost no power and leaves an embarrassing amount of black heavy smoke( Not head gasket for sure). A week ago mechanic replaced the fuel pressure damper and the shaking was gone for a day and the car sounded fine but the power was not back to normal. The next day the car is acting up all over again l...too it back and the mechanic said the damper failed again, in a day.
I can see the damper is brand new and he told me to get a fuel pressure regulator and he will get the damper under warranty. Anybody here familiar with this? It's a 92 manual transmission Lexus ES300 with 3.0 V6 3VZFE engine

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01 Aug 2019 15:14 #32330 by Deltron
Replied by Deltron on topic All injectors are open and firing
I'd make sure it wasn't being commanded that rich first

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  • nathan.brook
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01 Aug 2019 16:58 #32331 by nathan.brook
Replied by nathan.brook on topic All injectors are open and firing
How can I check it? I have changed the ECU and I don't know how to find or figure out an electric shorting out somewhere

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02 Aug 2019 19:16 #32379 by Tutti57
Replied by Tutti57 on topic All injectors are open and firing
Does it do this all the time? Definitely limit running the engine or you'll end up putting another converter in it from melt down.

Do you know anyone with a scope? It would be nice to know if the O2 sensor is doing its job. You could pull an intake hose and see if it leans out. An incorrectly stuck lean sensor would command rich.



Nissan Technician - ASE L1 Master Tech

Lots of diagnostic gear.

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