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#31 |
![]() Join Date: Oct 2021
Location: Tampa
Posts: 19
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Did some more testing today...
Both pumps are working, but I am still only getting 18-20psi fuel pressure... on top of that if I pinch off of the return fuel line, there is no change in pressure.. As mentioned the pumps are new Advance Auto (Car Quest) E219663 pumps from a same year 7.4L Suburban.. Which I am now realizing might just be the wrong pumps.... I just ordered new GM ones (EP381).. Hopefully that helps the fuel pressure issue.. Also discovered some lovely coolant under the passenger side dash.. I am guessing from when I used the heater to test it.. fml... Last edited by kapkanimd; 02-27-2022 at 09:09 PM. |
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#32 |
![]() Join Date: Oct 2021
Location: Tampa
Posts: 19
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Update! New pumps in, car is running normal now! Finally!
However, I got it up to temp (no issues) then let it sit for a bit. When I started I got the dang 31 Cam sensor code again. The car didn?t run as rough as it used to with the SEL light and actually restarted, so still in a better place? I?ve tried 3 different cam sensors so I?m guessing it still might be a ecm issue.. I?ll run some more tests, but overall happy.. Coolant leak: I tried a new cap but still leaking.. I think it might just be corrosion at the inlet and I need a new tank.. anyone see this before? |
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#33 | |
![]() ![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,154
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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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#34 | |
![]() Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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Sent from my SM-G950U using ZR-1 Net Registry mobile app |
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#35 |
![]() Join Date: Oct 2021
Location: Tampa
Posts: 19
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Quick update:
-Replaced the clutch master cylinder and slave cylinder (was leaking bad in bell housing) -Replaced the coolant reservoir (however I think the heater core might still be leaking) -Dropped oil pain, cleaned everything up, and put new gasket Now no leaks at all and car is still running great. It is now giving me issues starting where it is just clicking.. I think it is the switch ![]() Still left to do: -Suspension: bushings, tie rod ends, and shocks -Radio not working (shows the stuck time of 1:00, no sound, and no antenna) -A/C not working (clutch not coming on) -Paint needs fixed (clear coat missing on hood and other areas) -Replace all the weather stripping Turning into a long project, but hopefully worth it in the end |
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#36 |
![]() Join Date: Dec 2019
Location: st louis mo
Posts: 747
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Cam codes are probably due to misfire,are the injectors fat body type or plastic skinnys,I would definitely get a 94 or 95 ecm because the 91 ecm is junk from new
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95 admiral blue z(sold)/ / 93 ruby z(sold) 91 steel blue z/95 aqua z haibeck 510, 91 callaway 415 areobody #5 |
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#37 |
![]() Join Date: Jun 2013
Location: PA
Posts: 879
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#38 |
![]() Join Date: Dec 2019
Location: st louis mo
Posts: 747
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every 91 i have had (years ago) the ecm went south on low mile cars (3) and back then i believe around year 97-98 they updated the part number to the later year part number/plug and play ac delco i bought them whole sale for under 200.00 brand new
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95 admiral blue z(sold)/ / 93 ruby z(sold) 91 steel blue z/95 aqua z haibeck 510, 91 callaway 415 areobody #5 |
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#39 |
![]() Join Date: Oct 2021
Location: Tampa
Posts: 19
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Do you have the part number and a source to get it?
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#40 | |
![]() Join Date: Jun 2013
Location: PA
Posts: 879
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They are only available on the used market. |
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