ZR-1 Net Registry Forums  

Go Back   ZR-1 Net Registry Forums > C4 ZR-1 > C4 ZR-1 General Postings

Reply
 
Thread Tools Display Modes
Old 04-07-2020   #1
EDT
 
Join Date: Feb 2020
Location: Covington, LA
Posts: 9
Default ASR or Fuel Starvation?

So I've finally gotten the 92 I picked up to a point where I feel comfortable pushing it a little on some backroads and onramps, but I've started to have an issue with completely losing power on the exit of long right hand corners. I don't know enough about these cars yet to know if this is a common issue, so I thought I'd ask before pulling fuses and really diagnosing. I have ASR off when this happens and just a touch under half a tank of fuel. Maintenance throttle mid-corner isn't affected, but when I really put the pedal down off apex, the car dies on me for .5-1sec and then resumes. Does ASR turn off completely when you push the button and get the light on the info center or is there a special song and dance to get it off fully? Thanks
EDT is offline   Reply With Quote
Old 04-07-2020   #2
secondchance
 
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
Default Re: ASR or Fuel Starvation?

Quote:
Originally Posted by EDT View Post
Does ASR turn off completely when you push the button and get the light on the info center or is there a special song and dance to get it off fully? Thanks
No song and dance. Push button, ASR off warning light means no ASR.
I suggest start by pulling OBD codes. How many miles on the odometer?
secondchance is offline   Reply With Quote
Old 04-07-2020   #3
EDT
 
Join Date: Feb 2020
Location: Covington, LA
Posts: 9
Default Re: ASR or Fuel Starvation?

Quote:
Originally Posted by secondchance View Post
No song and dance. Push button, ASR off warning light means no ASR.
I suggest start by pulling OBD codes. How many miles on the odometer?
Darn, thanks. Just over 28k

Edit: Just pulled codes and got the typical C12 but then a bunch of --. I'm going to say it was a low fuel issue for now.

Last edited by EDT; 04-07-2020 at 07:13 PM.
EDT is offline   Reply With Quote
Old 04-07-2020   #4
DRM500RUBYZR-1
 
DRM500RUBYZR-1's Avatar
 
Join Date: Sep 2008
Location: Mullica Hill, New Jersey
Posts: 2,593
Default Re: ASR or Fuel Starvation?

Fuel starvation.
Tape pressure gauge to windshield and repeat what you did.
Marty
DRM500RUBYZR-1 is offline   Reply With Quote
Old 04-07-2020   #5
Ccmano
 
Ccmano's Avatar
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
Default Re: ASR or Fuel Starvation?

Quote:
Originally Posted by DRM500RUBYZR-1 View Post
Fuel starvation.
Tape pressure gauge to windshield and repeat what you did.
Marty
Yup, a known C4 issue. Change the filter, then pull the fuel pumps and have a look at the socks (external filters on the pump inlets). Then make sure theres no water or gunk in the bottom of the tank where the pickup is. If the pumps have never been changed I would change them out while your in there. Their relatively cheap at RockAuto. Don’t bother with the high dollar pumps their not worth it.
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.
Ccmano is offline   Reply With Quote
Old 04-07-2020   #6
EDT
 
Join Date: Feb 2020
Location: Covington, LA
Posts: 9
Default Re: ASR or Fuel Starvation?

Quote:
Originally Posted by Ccmano View Post
Yup, a known C4 issue. Change the filter, then pull the fuel pumps and have a look at the socks (external filters on the pump inlets). Then make sure theres no water or gunk in the bottom of the tank where the pickup is. If the pumps have never been changed I would change them out while your in there. Their relatively cheap at RockAuto. Don’t bother with the high dollar pumps their not worth it.
H
The pumps and socks are less than a month old and I cleaned out the tank while I was in there, so I've got that covered. Sounds like I just need to top up before slinging the old girl around.
EDT is offline   Reply With Quote
Old 04-07-2020   #7
A26B
 
A26B's Avatar
 
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,394
Default Re: ASR or Fuel Starvation?

You have answered your own question. C4's are known to suffer from fuel starvation on the track, IF the fuel level is low. Like you said, try it again with higher fuel level.
__________________
Jerry Downey
JERRYS LT5 GASKETS & PARTS
http://www.jerrysgaskets.com
1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc.
2016 Black-Red, 3LT-Z51 Auto 8-speed.
A26B is offline   Reply With Quote
Old 04-08-2020   #8
dredgeguy
 
dredgeguy's Avatar
 
Join Date: Aug 2012
Location: Ellicott City, MD
Posts: 1,713
Default Re: ASR or Fuel Starvation?

Also recheck the hose connections to the fuel pump. Mine came loose which can cause a similar condition to what you are having. We put new stainless clamps on and problem solved.
__________________
Charlie

__________
Dredgeguy
WAZOO Member

1992 Bright Red/Black ZR1 #246
Dana 4:10 gears
Polished LT5 by Haibeck
Polished Fikse FM5's with Michelin Pilot Sport 2
Stainless Works headers and cats with Corsa
dredgeguy is offline   Reply With Quote
Old 04-08-2020   #9
Paul Workman
 
Paul Workman's Avatar
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
Default Re: ASR or Fuel Starvation?

Sounds to me 2 that you've located the probable issue. Rule of thumb is to keep them above a quarter tank and you'll be safe.

However, when I first read your post, I recalled a problem I had with that accordion-hose between the air filter box and the snorkel on the TB. They get warm and sometimes collapse at WOT. It is an easy DIY fix, but being new to the ZR-1, I thought you might wanna know about that quirk - should it fall flat as the tach climbs above 4500 (in my case).

Welcome to the 'Brotherhood of the Beast!'

Paul.
__________________
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
Paul Workman is offline   Reply With Quote
Old 04-08-2020   #10
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
Default Re: ASR or Fuel Starvation?

Quote:
Originally Posted by EDT View Post
The pumps and socks are less than a month old and I cleaned out the tank while I was in there, so I've got that covered. Sounds like I just need to top up before slinging the old girl around.
Did u say u changed the gas filter up front?
__________________
[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
XfireZ51 is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:26 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright ZR-1 Net Registry 2020