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89-94 NM Diagnostics...

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Old May 29, 2009 | 05:41 PM
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Infam0usMax's Avatar
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89-94 NM Diagnostics...

Okay...so the guys that I always take my car to said the fuel injectors are shot now...so...I would like to know if its possible for me to go to a Nissan dealership and have them do a Diagnostic test and if anyone knows how much will it cost? Also is it possible that this being an older car will it shoot the right code to tell me everything that wrong even if its a little off? Hope this thread will help a few people when it comes to wondering whats going on with their car instead of asking a lot of questions cause ive asked a ton of them and got good help but its getting old. Thanks again guys...
Old May 29, 2009 | 05:48 PM
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our cars suck about providing codes for dead injectors. besides if the car isn't misfiring then you don't have a dead injector. just do an ohm test to see how well in-spec they are, and aside from that, don't listen to people who are just trying to make a quick buck.

one of the biggest causes of crappy-running 3rd gens is corrosion in the connectors, and out-of-spec sensors (coolant temp, 02, maf, tps, etc), vac leaks, carbon-covered air components (throttle, iacv, pcv), and overdue tuneups. if none of those are a problem then it would be time to look into actual component failures.

Last edited by CapedCadaver; May 29, 2009 at 05:54 PM.
Old May 29, 2009 | 05:54 PM
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Originally Posted by CapedCadaver
our cars suck about providing codes for dead injectors. besides if the car isn't misfiring then you don't have a dead injector. just do an ohm test to see how well in-spec they are, and aside from that, don't listen to people who are just trying to make a quick buck.
Glad I asked but its not just about the injectors that I want to know about there just seems to be something really off about the car and i dont know if it was u that said it but it is misfiring from the youtube vids i posted and sounds like crap.
Old May 29, 2009 | 06:20 PM
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Originally Posted by Infam0usMax
Glad I asked but its not just about the injectors that I want to know about there just seems to be something really off about the car and i dont know if it was u that said it but it is misfiring from the youtube vids i posted and sounds like crap.
well if it is misfiring then ohm the injectors. if one's out of spec, replace it. if all are in spec, see if it's plugs or wires causing the problem instead (trade wire of a bad cylinder with a good cylinder... if problem wire, wire is the cause, if not, trade spark plugs the same way. if problem follows plug, plug is the cause. if not..... then the injector is probably clogged despite being electrically functional.)
Old Jun 2, 2009 | 09:43 PM
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Originally Posted by CapedCadaver
well if it is misfiring then ohm the injectors. if one's out of spec, replace it. if all are in spec, see if it's plugs or wires causing the problem instead (trade wire of a bad cylinder with a good cylinder... if problem wire, wire is the cause, if not, trade spark plugs the same way. if problem follows plug, plug is the cause. if not..... then the injector is probably clogged despite being electrically functional.)
Good news on the injectors the connectors are reading 13ohms if i read it right or did it right...but my spark plugs had my car running hard because two of them somehow jumped off but u could really tell they were off so i pushed them back on and now one of them keeps coming back a little dont know why?
Old Jun 3, 2009 | 04:35 AM
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because it's time to get new plug wires?
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