converted a northstar 1994 sts to a 4.9 and have everything but injector pulse, anyone have any ideas?
2007-02-03 09:31:25 · 3 answers · asked by bwibwi2000 1 in Cars & Transportation ➔ Car Makes ➔ GMC
check and triple check the grounds! they are very important and it's easy to over look one or two
2007-02-03 09:36:30 · answer #1 · answered by howardhughes 1 · 0⤊ 0⤋
Did you transfer all of the computer system and harnesses? You are dealing with 2 completely different ignition systems here. The 4.9 relied on the ignition module in the distributor as well as the ECM to generate injector pulses. Do you have spark to the spark plugs? On this engine the 12 volt signal to the injector came from a fuse, and the ECM provided the ground path. The ECM toggled the ground to pulse the injector.
2007-02-03 15:07:23 · answer #2 · answered by Mr. Badwrench 6 · 0⤊ 0⤋
You're in a world all by yourself on this one.
I'm sure you pulled over the PCM too. Check the pins to make sure none are bent at the PCM.
2007-02-03 09:35:58 · answer #3 · answered by Lemar J 6 · 0⤊ 0⤋