fuel help
davideborg
04-07-2009, 05:05 PM
93 Pont. Transport, I had a flame backfire in my TBI it scourched the injector leads I have repaired them and now I dont have any power to the injectors. Could anyone have any suggestions?
ctwright
04-07-2009, 05:13 PM
93 Pont. Transport, I had a flame backfire in my TBI it scourched the injector leads I have repaired them and now I dont have any power to the injectors. Could anyone have any suggestions?
Could it have been possible that the two wires crossed each other when they were burnt bare. If so the short may have blown a fuse.
Could it have been possible that the two wires crossed each other when they were burnt bare. If so the short may have blown a fuse.
LMP
04-07-2009, 09:55 PM
93 Pont. Transport, I had a flame backfire in my TBI it scourched the injector leads I have repaired them and now I dont have any power to the injectors. Could anyone have any suggestions?
Well...you have the diagram in the previous thread (...it would have been fine to keep with the tread that you had already opened) ...have you made voltage tests? After checking the fuse OK, 12V is always hot on one side of the injectors (red and white) once ignition is ON and the ECM makes the ground on the other end of the injector coil...(drk green and drk blu). WHen the ECM does not ground the injectors, you will also measure 12V on drk green and drk blu. BUt at KEY ON, the injectors should fire for about 1 sec and during that interval drk green and/or drk blu would fall down to near 0 volt.
As suggested by ctwright, make sure the leads have not fused together as feeding 12V direct to the ECM grounding transistor is a threat to its integrity. I think though that the transistor circuits are internally current limited/protected, because the 10A fuse alone (it feeds other components too) would not be a safe limit.
PLease reply in this thread....
Well...you have the diagram in the previous thread (...it would have been fine to keep with the tread that you had already opened) ...have you made voltage tests? After checking the fuse OK, 12V is always hot on one side of the injectors (red and white) once ignition is ON and the ECM makes the ground on the other end of the injector coil...(drk green and drk blu). WHen the ECM does not ground the injectors, you will also measure 12V on drk green and drk blu. BUt at KEY ON, the injectors should fire for about 1 sec and during that interval drk green and/or drk blu would fall down to near 0 volt.
As suggested by ctwright, make sure the leads have not fused together as feeding 12V direct to the ECM grounding transistor is a threat to its integrity. I think though that the transistor circuits are internally current limited/protected, because the 10A fuse alone (it feeds other components too) would not be a safe limit.
PLease reply in this thread....
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