Bro cng is the issue when I bought my car it was on cng,I have cleaned my tb,replaced my tb,fuel pump,fuel filter,maf sensor,catalytic removed newplugs resetted the ecu for around 1000 times but still the problem remains.i saw a video on u tube regarding 1zz engine having this issue he opened the manifold and cleaned it the problem went away I guess I will have to do it next,jis din jaldi uth gaya
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