2005 Sequoia pulsing
I have a 2005 Toyota sequoia limited 2nd with 136000 miles. Just bought is. When the engine is working hard, accelerating up a hill, or at high speed an freeway going up hill there is a slight pulsing. Feels like a momentary loss of power. Probably not noticeable to most people. Once the engine stops working as hard the pulsing stops. Have cleaned the MAF sensor, air filter is good, and has new plugs. I ran some fuel injector cleaning through it and on that tank of gas it was almost gone. But on the next tank it’s back. Is this a indicator of failing fuel injector? Is there a way to test? Thanks for your help.
long term fuel trim is +18%
it thinks it's starved for fuel and it's trying to add as much as it can
How old is the fuel filter? Is fuel pressure up to specification?