Help Engine shaking and abnormal noise are not EGR problems

If you asked me where you could get the most unreliable hybrid information from the least qualified people, I would say Autozone.

Replacing 1, 2, 3 or 4 expensive coils would be a waste of money. You said you were replacing spark plugs; they do have a defined lifespan of 120,000 miles, Toyota allows 150,000 miles in some states and many use them longer.

If you had one misfire the standard no cost test is to swap the coil or plug with a cylinder that is not recording a misfire. OEM coils rarely fail.

The idea four coils would fail at the same time is ludicrous.

I would certainly do the block egr flow test (again?) - if that clears it you have a sticking egr valve. It's hard to keep up with what you have done or not tried when your posts are spread out everywhere.

The Autozone disclaimer in small print:

"The information provided within this report is intended to supplement, not replace, regular automotive maintenance programs or advice by a qualified automotive technician. Neither AutoZone nor any of its subsidiaries or affiliates assume any liability for the completeness or correctness of either the report or its content. Always seek the advice of your personal mechanic, dealership, or an ASE Certified automotive technician prior to attempting any repairs to your vehicle.

This is a free service offered by AutoZone to our customers and there are no fees or charges associated with this service... Based on the error codes retrieved..., a "most likely solution" is indicated."



Video with egr block flow test

 

egr block flow test?

 

No that is not true. Unplugging the egr power plug just leaves it in the position it was in. If the valve is sticking open it will continue to be sticking open. See the video above.