3vze random misfire?

[91'4bee]

NGK coppers or plain jane Densos. No fancy shit or domestic/german plugs in these trucks, they hate it.

Guess I know what I am doin this weekend...

 

[02SE]

I ran Bosch Platinum plugs in my '93 SR5 4wd 3VZE powered truck, for approx. 40k miles. No issues, and it was running fine when I sold it..

 

[91'4bee]

Been drivin some more and (knock on wood) I haven't heard any misfiring at idle or when the motor is under load but I feel like the throttle response has dwindled a bit but that could just be me. I am gonna switch to v-powers at the end of the week (O' Reillys near my house does sell them I just didnt look hard enough) and I am going to properly test my wires and TPS and then report back with results. As of now...:beer:

 

[91'4bee]

I put in the NGK v-power plugs saturday and it runs great, just like when the densos were in.

But the random misfire is back at 1500RPM only(not under load)...At this point I am thinking this is normal for the truck because it random misfired like this before back as far as I remember(before mods and such).

All wires, distributor and coil tested good and the TPS tested good for the tests I could do. How do you insert a thickness gauge when the TB is still on the car?? I couldn't do it so I only got readings for the wide open and closed throttle positions (they tested good).

The NGK platinum plugs looked just like the 8 year old densos only that the platinums were only a week old! And this time it took me an hour(instead of 4!) to do the plugs just cause I am getting pretty good at it now...:shrug:

No codes by the way

Let me know what else to check or do and thanks for taking the time