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02-08-2020
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#1 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Starts up then begins to run rough and dies
Went to take Z out yesterday for a quick run. It had been out a few days prior w a datalogging session. No problems. I have an Ostrich 2 emulator in the car. New bin, car wouldn’t start. Re-load, same issue. Replace Ostrich w flash prom, car starts using previous bin file but get a Code 41. Flash prom w new bin, car starts but begins to run rough then dies. No code.
I check FP, static w ignition ON jumps to 50psi then drops to 40. Nothing changed except for loading new bin in Ostrich. With the new build, I’ve been working on refining VE table as well as setting timing now that I don’t have knock. Car has been running great. New bins flash SES w ignition ON as they should. ECM flashes Code 12 when in ALDL as it should. Also compared the bin files and nothing appears out of whack from one cal to the other. My suspicion is fuel pump. Discuss.
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[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 Last edited by XfireZ51; 02-08-2020 at 11:14 AM. |
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02-08-2020
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#2 |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Starts up then begins to run rough and dies
How long does it run before it goes rough and dies? What does the fuel pressure do it you pull the vacuum line on the regulator?
H 
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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. |
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02-08-2020
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#3 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Starts up then begins to run rough and dies
Quote:
Haven’t pulled the vacuum line. Haven’t checked fuel pressure w motor running. Need 90* elbow to get to rail pressure fitting for that. I hear pumps with ignition ON.
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[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 Last edited by XfireZ51; 02-08-2020 at 12:16 PM. |
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02-08-2020
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#4 |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Starts up then begins to run rough and dies
I would test to eliminate the fuel pumps and filter first. Go from there. Especially since no codes are shown.
H
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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. |
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02-08-2020
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#5 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Starts up then begins to run rough and dies
Just checked MAP hose and regulator. Looks good.
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[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 |
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02-08-2020
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#6 |
 
Join Date: Nov 2007
Location: Sunshine State
Posts: 1,071
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Re: Starts up then begins to run rough and dies
Any chance the IAC is sticking at some point?
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[B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B] |
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02-08-2020
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#7 |
 Join Date: Feb 2011
Location: Clayton, North Carolina
Posts: 1,133
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Re: Starts up then begins to run rough and dies
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Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR] |
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02-08-2020
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#8 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Starts up then begins to run rough and dies
K got it. I think the ports on my laptop are going bad. Not downloading bin files properly. Reloaded Ostrich w different cable and motor was fine. Also checked w flashprom and that worked.
Laptop not recognizing USB devices on the ports I am using.
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[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 Last edited by XfireZ51; 02-08-2020 at 03:58 PM. |
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02-08-2020
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#9 |
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Join Date: Feb 2011
Location: Clayton, North Carolina
Posts: 1,133
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Re: Starts up then begins to run rough and dies
Time for a new laptop. Make sure it has solid state drive(s). Don’t chinz out on the memory[emoji512]
Sent from my iPhone using ZR-1 Net Registry
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Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR] |
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02-09-2020
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#10 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Starts up then begins to run rough and dies
A netbook would be fine. The bin file is 32k.
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[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 |
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Linear Mode
