Strange misfire

[hoser]

I have been driving the car to work for the last 3 days. Runs great in the morning but at the end of the day , it has been temperamental . It has stalled at idle and misses and will backfire through the exhaust when I try and give it anything over 20ish % throttle for the first 5km of highway , then it clears up and instantly runs smooth. I put new 60 lb injectors with alky chip in it last fall. Still have not found time to install the gauges , scan master or the alky kit, but I am not driving with boost.....which takes a lot of will power. Anyways , any guesses on what I will hopefully find when I take the scanner home from the shop this weekend to check it out ? It feels like a lack of fuel then turns itself on again...my guess is mass air flow sensor.

 

[hoser]

Of course it didn't act up on the way home from work with the snap on scanner hooked up.

 

[TTOP350]

Check the plug gap and tightness in the head?

 

[hoser]

I finally got it to act up with a scanner hooked up. I noticed the sensor readings were all over the place, tps , iac , voltage , and temp were way out of spec. checked the sensor and battery grounds and everything measured fine. I replaced the computer and it has seemed to cured the issues except the low rpm misfire. checked the plug wire to coil connections and found one corroded terminal. Cleaned the terminal on the coil (replacing asap) and replaced the wire end and boot and the mis is gone. Now I can get back to tuning / alchy install.