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Old 02-12-2012, 10:42 AM   #1
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Default injector fuse issue

okay so yesterday i was driving pretty hard under boost as i normally do haha and all of a sudden the car turned off and i came to a coasting stop. i check to see if the car would start again and all it did was crank just fine but no start. i usually have a check engine light but there was none (keep in mind im running a greddy e-ultimate). i check to see if there is a battery light and there was none. i check under the hood and the 30a injector fuse is blown. i swap fuses with another 30a fuse and try to start the car but it cranked and blew the fuse again. so i swap another 30a fuse in there and turn the car to the on position and the battery light came on and went out shortly after due to the fuse blowing again. i am wondering what the issue could be as i haven't yet tried trouble shooting thus far. i have a wiring diagram and read a bit on injector fuse blow out but none match the "ignition switch ON" blow out of the fuse. im wondering if maybe the injectors themselves are now faulty all of a sudden cause i have rx7 460cc injectors in now or maybe the stock fuel pump is blowing it out right now. i also have been thinking maybe the stock ecu as gone bad. please help
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Old 02-12-2012, 12:13 PM   #2
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are they low impedance injectors?
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Old 02-12-2012, 12:16 PM   #3
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Unplug your ignitor and try another fuse. Report back.

Edit: Irregardless, your injectors wouldn't cause this.
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Old 02-12-2012, 03:51 PM   #4
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okay i just got off work and about to hit the parts store to purchase more fuses. in the mean time what does pulling the ignitor rule out? are there a lot of possibles that can cause a problem like this? i have been driving this car like this for 2 months and all of the sudden this happens.
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Old 02-12-2012, 03:52 PM   #5
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o and no they are high imp jus like the stocks. i am aware of low imp injectors frying ecus without resistors haha.
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Old 02-12-2012, 04:26 PM   #6
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Did you wire in the emu yourself? It sounds like one of your injector harness leads from the emu are grounding out on something.

Go over your wiring install.
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Old 02-12-2012, 04:40 PM   #7
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nope it's a boomslang harness but i did do the injector clips to make the 460's work ill check those
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Old 02-13-2012, 02:30 AM   #8
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okay so i have resolved the issue. there was an injector ground right under the throttle body that was loose due to one of the bolts that hold the upper part of the intake manifold to the block wiggled its way out. the fuse and ecu are happy now grounds are somethin else haha.
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