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01-27-2013
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#1 |
 
Join Date: Nov 2011
Location: Salt Lake City, Utah
Posts: 167
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Are these injectors original?
Last fall my 91 would stumble when I got on it. The car has a very sorted past with no records at all. I figured that all I needed was to change injectors assuming that they where the originals. I pulled the plenum and checked the ohms only to find that everyone of them was 14.0 to 14.1. One set is orangey yellow and the other set is black. Are these original, and they have not shorted yet, or has a p.o. changed them. If they are ok why would it stumble? I have changed spark plugs.
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01-27-2013
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#2 |
 Join Date: May 2007
Location: Addison IL
Posts: 254
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Re: Are these injectors original?
Your primary injectors are Ford injectors. They have the Ford part number on them. Sometimes the part number has been obliterated by the supplier. They seem to work well. I have never seen one fail. The secondary injectors look like the OE injectors.
At what engine speed and throttle opening do you encounter the stumble? |
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01-27-2013
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#3 |
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Join Date: Nov 2011
Location: Salt Lake City, Utah
Posts: 167
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Re: Are these injectors original?
As I recall is was about 1500 to 2000 RPM. It only seems to happen when I really get on it. It seems to be starving for fuel. I have changed both pumps as well as the filter. I am getting 50 psi fuel pressure at idle, I have no idea where it is after I close the hood.
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01-27-2013
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#4 |
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Join Date: Nov 2011
Location: Salt Lake City, Utah
Posts: 167
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Re: Are these injectors original?
I just decided to change all 16 injectors. Those ones from Ford (yes they said Ford on them) looked a little funky. This way I know at least the injectors are OK. I will order new spark plug wires and replace them before I put the plenum back on. Mine still say LT5 on them, so they are at least 22 years old. Thanks for the help Marc. I just finished watching you on video be fore tackling this project. You gave me courage!!
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01-27-2013
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#5 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,686
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Re: Are these injectors original?
Marc,
Are the FORD injectors the same as the Accels? IOW, are they the SAME injectors? |
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01-28-2013
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#6 |
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Join Date: May 2007
Location: Addison IL
Posts: 254
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Re: Are these injectors original?
Chris,
50 psi fuel pressure at idle is too high. 43 psi +/- 1 psi is normal at sea level. Don't worry about it with respect to the stumble problem though. High fuel pressure at 50 psi won't cause a stumble, misfire or roughness. Maybe you have a shorted secondary injector causing the stumble? Check their electrical resistance. As they approach 6 ohms they stop flowing. Dominic, The Ford injectors have a different physical shape than the Accel injectors. I don't know who manufactures either one. |
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01-28-2013
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#7 |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,119
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Re: Are these injectors original?
Well whatever you replace them with make sure they have the stainless steel inserts to avoid rust. Accels, RCs etc are proven and work well. GC
__________________
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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01-29-2013
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#8 |
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Join Date: Nov 2011
Location: Salt Lake City, Utah
Posts: 167
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Re: Are these injectors original?
Here are a few photos of the "Ford" injectors, and the other injectors that where in my car. These have been replaced with Accels. I think that there will be a difference when I finaly am able to get the car out.
Chris |
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01-29-2013
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#9 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,686
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Re: Are these injectors original?
 Quote:
You using RCs? |
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04-11-2013
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#10 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,119
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Re: Are these injectors original?
Quote:
You betcha a member here once told me. They are an install once item. AKNA you get what you pay for. GC
__________________
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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