lost of power,rough idle & when giving it gas rpm's drop

1993 LEXUS GS 300
204,000 MILES
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TERRELL BRANDON
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i was diving one day doing 60mph and all of sudden i could not accelerate and lost power coming from emission test that i passed. ive just had a full tune up change mass air sensor no change,still no power and rough idle...
Sep 19, 2011 at 10:46 PM
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JACOBANDNICKOLAS
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  • 110,175 POSTS
check catalytic converter for plugging, check for vacuum leaks, check fuel pump pressure.
Sep 20, 2011 at 12:32 AM
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TERRELL BRANDON
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When I unplug the mass air flow sensor it idle & run the mass air flow is new out the box the second one I took the first one back because their was no change
Sep 20, 2011 at 1:02 AM
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RONSELLERS
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It is your ECU Module. Probably got hit by severe heat. Typically it is the capacitors that need replacement on the board (less than $2) but you need a TV repair place to solder the new caps on board. $20 generally. The problem is finding where it is. This was ask before but was not answered. Instead they said check the battery cables. lol
Sep 23, 2011 at 6:25 PM
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RONSELLERS
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Do this work?
Sep 23, 2011 at 6:26 PM
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RONSELLERS
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You could not accelerate because to ECU dropped you into Limp mode. You will need to downshift to run the car.
Sep 23, 2011 at 6:29 PM
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TERRELL BRANDON
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I will try that what do it look like & where is it located
Sep 23, 2011 at 6:57 PM
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TERRELL BRANDON
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once agian same problem;now changed the ecu,full tune,checked the cats new vac hoses new mass air flow sensor and also change the complet throttle body & cleaned it car still wont idle rpms are low
Oct 1, 2011 at 6:34 PM