I have had this same problem for a while..posted on here a long time ago and just don't know what's the deal. I'm ready to throw a carb on it and be done with it.. I have mods posted in my sig.. New 255 pump, new msd wires, coil cap, rebuilt the injectors, cleaned the maf, replaced the iac, o2 sensors... And more that I can't even remember.. Now for the problem.. I start it when its cold. It will idle for a min or two.. Then surge. Give it gas and it stumbles then revs... But the engine doesn't sound right.. Like a spark plug wire is off...(Already checked all of them.. And sprayed water on them@ night.) If I kill it.. Then restart it after a few seconds.. It will run GREAT for a minute or two then right back to sounding like crap.. And it doesn't have the power it should... It seems it runs good or okay in open loop but bad in closed loop?...(I might have the two mixed up...) I unpluged the maf while it was running and drove it... And it ran great @wot. But kinds weird everywhere else.. Also pulled the Iac while it was running and it died... Assuming it should... Any ideas to point me in the rigt dirrection would help.. Oh and timing is set at.....10 or 12... Thanks for your time..
Brandon
Brandon
