My lexus ls 400 (1994) check engine light is on and itried driving it and it would go then hesitate then go on and on then i pulled over then tried to go again and it wouldnt go i put it in second on it would go then studder then go then studder then go. Ive taken it to two shops and neither can retrieve any codes my exhaust are black with soot and smoke comes out of there also they say " needs new ecu" oh and there was a popping noise when restarted
Fuel filter? Or maybe something to do with disconnecting antenna motor or recharging ac or " overcharged"????????????
Since your check engine light is on, there is a problem. A fuel filter wouldn't trip the light, neither the antenna motor or a A/C Recharge i'm surprised that two shops couldn't pull a code, when they can't do that, they repalce the ECU or main computer of your vehicle. Are one of those shops a Lexus dealer? If not they may be able to help, and or try another shop before replacing the ECU.
possibly the egr valve is shot.
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