94z, put on D1sc, new AC plugs, car ran ok on factory injectors & no boost
went to tuner, he installed bosch 42# injectors & dyno tuned,car came back running rich
tuner blamed it on header gaskets leaking, so I replaced.
car started to run bad, started missing,
changed plugs again to irridums, still missing bad, thought Opti was dying so
ordered Delteq, installed with Taylor red spiral wires custom cut, but still missing
I have three cold header tubes #1,7,2
I pulled plugs,cleaned, they seem to be sparking ok during cold crank
compression ok, reinstalled the plugs, those 3 tubes are now warm, but still missing/barely running
The other tubes are damn hot.
Should I try 3 new plugs? Could those irridums foul in 20 miles? Any easy way to check the injectors in those cylinders - bosch 42's green stripes.
Any other ideas? This has all happened in one tank of gas, during which I got 10mpg.

 

I managed to foul out a set of plugs with about 2 mins of run time. It was funny watching them hold a flame when I pulled them out and hit them with a lighter.