2uzfe 100 series engine fluctuating (1 Viewer)

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Joined
Oct 23, 2007
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Location
Lagos state - Nigeria
Hello all, kindly help me engine is fluctuating when the throttle is not pushed. It goes up and down and it does not happen always.

The 8 coils and plugs are new and are original. The coils are not functioning properly some with cracks while some plugs changed by mechanic are not the specified ones.

I also replaced the fuel pump as I was told it is weak with low pressure. After the fuel pump change, the engine was running fine as supposed to run but few day now it started fluctuating.

I need help to get this resolved.
Thanks all
 
Fuel filter clogged, vacuum hose leak, fuel injector malfunction, MAF sensor dirty, air intake leak, etc. Any codes?
 

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