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05-20-2018
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#1 |
 
Join Date: Jun 2014
Location: Cincinnati, OH
Posts: 10
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91 Injectors replaced by GM with NOS in 2005
I went ahead and replaced my injectors with the Accel 150821. I later found out the original multec injectors were replaced by GM in 2005. I ohmed all the multecs and they ran great. Is there any way to know if the Nos injectors GM installed were ever updated for ethanol or should I just leave the Accels in there?
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91 Corvette ZR-1 #1346 |
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05-21-2018
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#2 | |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: 91 Injectors replaced by GM with NOS in 2005
Quote:
My NOS injectors were installed (according to the Corvette dealer) by GM in 2007. They went bad very shortly there after - and MAY have been a contributing cause of a burned exhaust valve a couple years later! Fact is, very often the issue with the alcohol damaged injector (windings) does not manifest itself until the injectors reach (nearly) operating temperature. So, if you were to measure the resistance when they were at room temp, finding them to read "normal" resistance e.g., 12 or 14 Ω is more common than not - i.e., giving a false "good" resistance value! No reason to remove the Accels. They're functioning just fine in several ZR-1s; mine included - for well over 6+ years now w/ ZERO issues!
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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05-21-2018
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#3 |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: 91 Injectors replaced by GM with NOS in 2005
Agree with Paul 100%. Contrary to the myth that only early ZR-1s had injectors that wasn't designed for ethanol blend, my 94 injectors were bad when I bought the car in 2000.
I strongly recommend staying with Accels. |
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05-22-2018
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#4 |
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Join Date: Jun 2014
Location: Cincinnati, OH
Posts: 10
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Re: 91 Injectors replaced by GM with NOS in 2005
Well 6 years seems like a long enough test to confirm the Accels. My fuel trims are a little high at Idle and cruise but controlled at 138 as opposed to 128 for stochiometric. I guess I will keep the Accels in there.
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91 Corvette ZR-1 #1346 |
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