allstar Posted July 22, 2015 Report Share Posted July 22, 2015 I have a 87 quest and just installed new non jet head a t3t4 turbo 2.5" intercooler piping and 3" exhaust no cats.and egr delete I have never seen this on any starquest that I've owned, after all installed and timed it runs good but when I go to rev up it stumbles and cant rev past 3k but hold on I checked injectors clips which have been replaced but the thing is if I unplug the secondary injector it will rev higher but still stumbles but dont die? And also I can do all this with my maf UNPLUGGED? ?? The car ran perfectly fine before I took it apart I am stumped and changed the computer out also to see if it was an issue Link to comment Share on other sites More sharing options...
speedyquest Posted July 22, 2015 Report Share Posted July 22, 2015 My first guess is that you have your injectors mixed up. Check to see if your using your secondary injector plugged into your primary's plug. Link to comment Share on other sites More sharing options...
allstar Posted July 22, 2015 Author Report Share Posted July 22, 2015 Injectors are on correct sides if I change them around I get black smoke and dont rev at all but will idle Link to comment Share on other sites More sharing options...
allstar Posted July 22, 2015 Author Report Share Posted July 22, 2015 Also relocated battery in trunk Link to comment Share on other sites More sharing options...
allstar Posted July 22, 2015 Author Report Share Posted July 22, 2015 But how and why does my car run without maf plugged in also Link to comment Share on other sites More sharing options...
allstar Posted July 22, 2015 Author Report Share Posted July 22, 2015 Maf unplugged and only running on secondary with primary plug and runs better but wt.... Link to comment Share on other sites More sharing options...
allstar Posted July 22, 2015 Author Report Share Posted July 22, 2015 Bad maf sensor now runs awesome Link to comment Share on other sites More sharing options...
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