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Originally Posted by parsonsj
An update:
Yesterday, I swapped the engine over to SEFI (it was bank to bank because the original tuner couldn't get the car to start that way). Now I know why! He had put in the wrong firing order!!!!!
Anyway, now that I'm running SEFI the car seems smoother at idle and part throttle accel.
Today I increased the IAC start position about 20%, and allowed it to move faster and farther. The car started much quicker, with no sag after initial fire. Much much better.
Tomorrow, I'll increase the cranking pulse width about 10% and see if that helps too.
jp
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that's great John. That's how you find the balance. The IAC park has to be enough so when it does fire it doesn't try to die immediately. Then figure out what pulse width makes it happy at that opening.
Jody