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04-25-2012
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#11 |
 
Join Date: Jul 2005
Location: Cresson, TX
Posts: 970
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Re: Back fire at start
I bet you have a leaking injector... My 91 did this before I put RCs in it. I replaced the inj on my 90 with the 91 injectors and the 90 developed the same backfire at start up...
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04-26-2012
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#12 | |
  
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: Back fire at start
Quote:
longer before firing. An extra second on the start switch might save some plenum diving. P.
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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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04-26-2012
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#13 |
 Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,479
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Re: Back fire at start
It's only been a couple of times, but I tried what Scottfab suggested, holding the key a little longer. So far so good. On the subject of injectors. From FIC. New or rebuilt?
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04-26-2012
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#14 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Back fire at start
I am running the rebuilts from FIC. They seem to work fine, but they are very sensitive to becoming stuck if they sit without fuel in them for any length of time. Jon at FIC has been great about servicing them as needed, but of course it's no fun to pull the plenum to pull the injectors after you just finished up another job. The price is right,though!
All things considered, I'd probably not buy the rebuilts again, but they are working fine for me as of now.
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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04-26-2012
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#15 |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Back fire at start
I would not buy the rebuilds. Im running RC injectors a lot of folks have had notihing but postitive things to say about the Accels as well.
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director  91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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04-26-2012
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#16 |
Join Date: Jul 2005
Location: Las Vegas, Nevada
Posts: 777
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Re: Back fire at start
RC's. Expensive, but-----
Mine are over 7 years and 10K without a burp!
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JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers: |
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04-26-2012
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#17 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Back fire at start
Quote:
5 years 60K no issues.
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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04-26-2012
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#18 |
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Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,479
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Re: Back fire at start
Any reason to use anything other than the factory recommended unit? Bigger injector = more power?
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04-26-2012
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#19 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Back fire at start
Quote:
The Factory unit could not handle modern day fuels with all the EPA additives. They we actually melting the insides of the injectors and causing other issues like rust formation etc. Back in the late 90s original ZR-1 owners were complaining to GM about defective injectors however GM would never acknowledge a defect with the comments of they were designed to perform before all the new EPA additive requirements. So basically suck it was GMs response. RCs and Accels other than being new have a stainless steel sleeve that solved the melting and rust issue. These rebuilds do as well but Ive heard more than a few folks complaining about issue with the rebuilt injector having to be replaced or cleaned. However I have heard nothing but great comments about the customer service of the rebuilder however that can only go so far when you have to keep pulling the plenum.
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 04-26-2012 at 01:37 PM. |
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04-26-2012
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#20 |
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Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,479
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Re: Back fire at start
Thanks GC, you missed my point. Not GM injectors, but the actual size and rating of the injector. Like diferent size jets in a carb. Can I put in an injector that will flow more fuel and give me a bazillion more hp?
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Linear Mode
