Quote:
Originally Posted by Purestock240
got the maf issue fixed. wired in a ka maf. now it just has a sputter at low rpm if i go WOT and when its held at a continuous rpm at higher rpm. it also blows a bit of black smoke
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What ECU? What are the shape of the injectors? Run some cleaner through them too. Sounds like shit injector come on under low fuel pressure could be a possibility too. Did you swap the plugs yet? get new ones. If you're running bigger cams with stock injectors you're going to have wacky stuff like this happening. Time for used pfc l jetro and some 550s IMO. Or you can figure out the cam size if they are only like 255 or something on duration then you could get away with just bumping up the fuel pressure a little bit.
Also what's the TPS voltage look like? Is the TPS working correctly?
What's your base timing? Did you check this with a timing light per FSM?
All critical things you also need to be checking.
All these damn cars come into the dyno or even when I help people remotely have timing that is way off and all of sudden they have 50-75 more hp and are so happy and thankful. Basic basic basics first.