Injectors blowing fuses?
#1
Injectors blowing fuses?
My 1991 seville keeps blowing one of the two 7.5amp injector fuses. 10amp doesn't blow Does this mean
I have a bad injector? How do I find out which one? Or perhaps are there other than
half the injectors on this circuit which might be blowing the fuse?
Thanks
Potlatch
I have a bad injector? How do I find out which one? Or perhaps are there other than
half the injectors on this circuit which might be blowing the fuse?
Thanks
Potlatch
#3
Senior Member
True Car Nut
If you want to invest a few fuses, you could try disconnecting the injectors one at a time, start the engine, and see if the fuse doesn't blow when a particular injector is disconnected. Then you could switch injectors around and see if the problem stays with the wiring or moves with the injector.
Seems like a lot of work, but electrical shorts can be difficult to track down. Start with a general inspection of all wiring in the engine compartment to see if it is something obvious before you start pulling injectors.
Seems like a lot of work, but electrical shorts can be difficult to track down. Start with a general inspection of all wiring in the engine compartment to see if it is something obvious before you start pulling injectors.
#4
Thanks for your advice. It doesn't blow the 7.5 amp except after some driving. 200 miles this weekend with 10amp fuse and no problem; however I never really pushed it hard. And as I recall both times it blew was after a full-throttle event. The shop manual and wiring diagrams don't show anything on the
circuit than the 4 injectors. Anyone know if there'* more on that circuit? I mean it does run fine, altho
NOX emissions are very high, one injector is 0.2 ohns while others on that circuit are 1.0-1.3 ohms;
High NOX suggests lean, right? And I'd almost swear there'* a single cyl denotating on throttle tip-in..
Would all suggest one lean,dirty, failed injector? Of course, I can R&R the four suspects
circuit than the 4 injectors. Anyone know if there'* more on that circuit? I mean it does run fine, altho
NOX emissions are very high, one injector is 0.2 ohns while others on that circuit are 1.0-1.3 ohms;
High NOX suggests lean, right? And I'd almost swear there'* a single cyl denotating on throttle tip-in..
Would all suggest one lean,dirty, failed injector? Of course, I can R&R the four suspects
#5
Senior Member
True Car Nut
I would be inclined to suspect the 1 injector that is different than all the rest. Lower ohms indicates closer to short I believe. Maybe switch that injector with one from the other side to see if the problem moves?
#6
Senior Member
True Car Nut
I agree. Switch the injector with the lower resistance to the other circuit and see if the problem follows the injector.
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Rich53
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06-23-2007 10:46 AM