Well you did the right thing by letting off the throttle any time the CEL light blinks. The blinking is the ECU saying there is a really big misfire going on that if it continues long enough will pour too much raw fuel into exhaust possibly harming cats, possibly. I wouldn't worry about a few seconds...
I wouldn't start worry about new injectors. I'd suggest making sure they stay clean first. I've used a goofy named product I first got because I wanted an alcohol fuel treatment for my quads.
It worked so well I then used it on all other small engines and then my vehicles. It works in a couple ways to help clean intakes, fuel system, injectors and finally engine internals (freeing them of carbon over time).
It is less expensive per ounce than any other alcohol fuel treatment I've come across and I get it on amazon by the quart for about $25.
It only takes 1 oz per 18-20 gals, so the quart lasts awhile across a few vehicles and mowers.
This could clear up the issues you came across and it really should be done regardless as a preventative.
Star Tron Enzyme Fuel Treatment
https://www.amazon.com/Star-Tron-Enz...dDbGljaz10cnVl
Luck and enjoy the Runner. : ^ )))
__________________
2001 Limited 4WD - 346+K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL - StopTech ANGLED rotors - In series 699 trans cooler, New Yota1 transmission, All new OEM suspension front to rear.