Injector Identification needed - ZR-1 Net Registry Forums

Young1 · 12-28-2018

Plenum is off and neither Marc's site nor Stickies indicates. Please identify what I have installed. They all check out ohm wise.

Green band installed in secondary
3226 5235366

Red band installed in primary
2203 5235357

First owner did replace originals but could not tell me with what. Probably work was fine st a dealership. Could these be 93-95 MY injectors?

Ccmano · 12-28-2018

Can you post a photo?
H

Ccmano · 12-28-2018

From the numbers they are Rochester MPI injectors that are original equipment on the 90-92 engines. You can find them listed here...
http://teamzr1.com/injector.htm
H

Young1 · 12-28-2018

Does that mean that these will fail because of alcohol? Or were these part numbers upgraded to resistant materials?

Sent from my iPhone using ZR-1 Net Registry

secondchance · 12-28-2018

Quote:

Originally Posted by Young1

Does that mean that these will fail because of alcohol? Or were these part numbers upgraded to resistant materials?

Sent from my iPhone using ZR-1 Net Registry

Others may disagree but I have a 94 and it’s injectors failed way back when. Was it alcohol? I don’t know.

Young1 · 12-29-2018

I am trying to track down the slight knock and slight rough idle. The injectors check out with ohms and so do the coils. I am replacing the coil's since they are originals.

Sent from my iPhone using ZR-1 Net Registry

Ccmano · 12-29-2018

Quote:

Originally Posted by Young1

I am trying to track down the slight knock and slight rough idle. The injectors check out with ohms and so do the coils. I am replacing the coil's since they are originals.

Sent from my iPhone using ZR-1 Net Registry

Ohms is only half the Issue. Spray pattern is the other. Check for a local place that can check the flow. Problem is it gets a little pricy to have them checked. $10 to 20 per injector is not unusual. It’s almost worth it to just replace the injectors. Accels and FIC’s are $600 -700 a set of 16. While your at it Ohm out the wires, replace the plugs and do a compression test. At sea level compression should be ~200-215 psi.
H

XfireZ51 · 12-29-2018

Well as we realized during my own recent check of injectors, Marc Haibeck will flow test injectors for $100. And the shop I used also charged $99 for flow testing and inspecting all 16 injectors. In my case, it turned out to be well worth the money ultimately leading me to replace all of them w FICs.

12-28-2018	#1
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 896	Injector Identification needed Plenum is off and neither Marc's site nor Stickies indicates. Please identify what I have installed. They all check out ohm wise. Green band installed in secondary 3226 5235366 Red band installed in primary 2203 5235357 First owner did replace originals but could not tell me with what. Probably work was fine st a dealership. Could these be 93-95 MY injectors? __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

12-28-2018	#2
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Injector Identification needed Can you post a photo? H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

12-28-2018	#3
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Injector Identification needed From the numbers they are Rochester MPI injectors that are original equipment on the 90-92 engines. You can find them listed here... http://teamzr1.com/injector.htm H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

12-28-2018	#4
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 896	Re: Injector Identification needed Does that mean that these will fail because of alcohol? Or were these part numbers upgraded to resistant materials? Sent from my iPhone using ZR-1 Net Registry __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

12-29-2018	#6
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 896	Re: Injector Identification needed I am trying to track down the slight knock and slight rough idle. The injectors check out with ohms and so do the coils. I am replacing the coil's since they are originals. Sent from my iPhone using ZR-1 Net Registry __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

12-29-2018	#8
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,707	Re: Injector Identification needed Well as we realized during my own recent check of injectors, Marc Haibeck will flow test injectors for $100. And the shop I used also charged $99 for flow testing and inspecting all 16 injectors. In my case, it turned out to be well worth the money ultimately leading me to replace all of them w FICs. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX