I have recently started seeing flashing check engine light only under full throttle then goes away. All ignition coil packs have been replaced. What things should I start checking first? Thank you in advance.

 

What code(s) is the check engine light on for?

 

P0300 Random misfire

 

I would change spark plugs and wires if you havent already. Use dielectric grease on the spark plug boots as it helps quite a bit.

 

Turned out that a vacuum hose was disconnected from the front part of the air intake box. Connected vacuum hose and replaced pinch hose clamp with screw tighten clamp. So far no codes!

 

Bummer my flashing check engine light is back only under full throttle. Same code p0300 random misfire.

 

Could be the wiring to your coil packs. The heat makes the insulation brittle. You will have to get new leads and replace back to main harness. Get one with easy access and take the plastic conduit off (it will disintegrate) and look at the insulation

 

P0300 is an "Indicator DTC." You will need to dig deeper.



Paul

 

More info.

Paul