SYS flash - ZR-1 Net Registry Forums

dredgeguy · 02-24-2020

After weeks of sitting in my garage I took my 92 out yesterday to blow the dust off it. Had the oil temp reading on display to know when it was safe to get the revs up and let the old girl sing.......
For the first time ever, saw sys flash and then the oil temp would come back. Changed over to coolant temp and same thing, sys flashing and then back to normal.
I am heading overseas today so have not had time to pull codes but read somewhere that possible older battery? I need to check my files but am sure the current battery is 5 - 6 years old so my guess is it should be replaced (at least before MR8 & BG trip this year).
Any suggestions?
Thanks

Paul Workman · 02-24-2020

Especially after sitting, low voltage would come to the top of the list first.

Before starting, if the battery voltage is down around 12.1 or less, it may be a question of low voltage. Check you battery connections. Give the connections a quick brushing "while your at it.

So, then check you charging system. It should be 13.8 (hot) to 14.7 (cold) with the engine running. But, first, "clear the decks" of any old news by disconnect the battery for 30 seconds or so.

Unless you have the battery on a SMART CHARGER (e.g., Battery Tender), 5-6 years is approaching life expectancy (MTBF), especially if it is stored for long periods (i.e., winter). But, with a modern electronic charger, the batteries in both Zs and the 69 Vette are waaay older - over 12 years and counting on the 69 Vette.

secondchance · 02-24-2020

I fully agree with Paul. It's battery issue most likely.

DRM500RUBYZR-1 · 02-24-2020

I agree.
Battery.
Safe travels.
Marty

dredgeguy · 02-24-2020

Thanks guys and greetings from somewhere over the Atlantic. Will get it all sorted out when I get home

ZuggZR1 · 03-01-2020

I started to go thru this recently. My issue was the EPROM was not clicked in correctly but the battery issue seems to be the most common issue for SYS.

Good luck.

02-24-2020	#1
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,645	SYS flash After weeks of sitting in my garage I took my 92 out yesterday to blow the dust off it. Had the oil temp reading on display to know when it was safe to get the revs up and let the old girl sing....... For the first time ever, saw sys flash and then the oil temp would come back. Changed over to coolant temp and same thing, sys flashing and then back to normal. I am heading overseas today so have not had time to pull codes but read somewhere that possible older battery? I need to check my files but am sure the current battery is 5 - 6 years old so my guess is it should be replaced (at least before MR8 & BG trip this year). Any suggestions? Thanks __________________ 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

02-24-2020	#2
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: SYS flash Especially after sitting, low voltage would come to the top of the list first. Before starting, if the battery voltage is down around 12.1 or less, it may be a question of low voltage. Check you battery connections. Give the connections a quick brushing "while your at it. So, then check you charging system. It should be 13.8 (hot) to 14.7 (cold) with the engine running. But, first, "clear the decks" of any old news by disconnect the battery for 30 seconds or so. Unless you have the battery on a SMART CHARGER (e.g., Battery Tender), 5-6 years is approaching life expectancy (MTBF), especially if it is stored for long periods (i.e., winter). But, with a modern electronic charger, the batteries in both Zs and the 69 Vette are waaay older - over 12 years and counting on the 69 Vette. __________________ 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

02-24-2020	#3
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,710	Re: SYS flash I fully agree with Paul. It's battery issue most likely.

02-24-2020	#4
DRM500RUBYZR-1 Join Date: Sep 2008 Location: Mullica Hill, New Jersey Posts: 2,566	Re: SYS flash I agree. Battery. Safe travels. Marty

02-24-2020	#5
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,645	Re: SYS flash Thanks guys and greetings from somewhere over the Atlantic. Will get it all sorted out when I get home __________________ 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

03-01-2020	#6
ZuggZR1 Join Date: Jul 2019 Location: Holly Springs, NC Posts: 91	Re: SYS flash I started to go thru this recently. My issue was the EPROM was not clicked in correctly but the battery issue seems to be the most common issue for SYS. Good luck. __________________ George Zugg 1990 DRM 500 ZR1 build#952