Code 31 - ZR-1 Net Registry Forums

mmkkpro · 05-10-2020

Good morning guys, I am having an intermittent code 31on my 1990Z, it doesn't seem to affect the way the engine runs other than no secondaries. When I unhook the battery ground it goes away and runs great. I checked the FSM and for intermittent says to check section B.
I checked Jerry's, and he does not show a listing for a cam sensor, would you guys know where to find one? Part seems to be superceded. Something about new part has wrong shield. Can old shield be used on new sensor maybe?
I just got done cleaning connections and I'm going on a drive now, see what happens, thanks for any info.

Jetjock · 05-10-2020

I had this happen on my 92Z. Still haven't fixed it. I pulled it and replaced it with another one and it ran horribly. I put the old one back it and it ran better but it won't accelerate. I've been real busy with another Z but plan to get back to it.

Roy

mmkkpro · 05-10-2020

Hi Roy, I cleaned the connector and drove it all day and hasn't done it again. Driving her to work tomorrow, will see what happens. It sat for many years so I know there will be some bugs to work out, thanks, good luck with yours.

Young1 · 05-12-2020

My code 31 she would just quit running when driving in town. E we oils start right back up but quite unnerving. I hope you can find a replacement. This is one of the few parts NLA that does not yet have a work around yet.

32valvZ · 05-12-2020

You can get a new cam sensor from Phil Wasinger on this site.. (Jagdpanzer) I and others bought one from him and it works great.

GOLDCYLON · 05-13-2020

Quote:

Originally Posted by 32valvZ

You can get a new cam sensor from Phil Wasinger on this site.. (Jagdpanzer) I and others bought one from him and it works great.

X2 talk to Phil. GC

Young1 · 05-13-2020

I have Phil’s prototype first one in my car. I can say there have been no issues. I was not sure he was yet building the cam sensor. He is our only hope it seems.

mmkkpro · 05-13-2020

Thank you guys for letting me know about Phil. I have driven about 200 miles this week so far and have had no more issues. I suspect cleaning the connector helped, so far so good. The tone generator has begun to work, maybe driving her is bringing things alive. My cruse control works, AC, all lights, hatch release, among other systems. Sitting all those years was kinda hard on her, but I think she is happy to be loved and cared for, lol. I plan on going through all electrical connections and clean them up. Thank all you guys for replying.

Young1 · 05-14-2020

Often times unplugging and plugging back makes things work again. High resistance at contact points. Do the simple first.

05-10-2020	#1
mmkkpro Join Date: Apr 2019 Location: Supply NC Posts: 121	Code 31 Good morning guys, I am having an intermittent code 31on my 1990Z, it doesn't seem to affect the way the engine runs other than no secondaries. When I unhook the battery ground it goes away and runs great. I checked the FSM and for intermittent says to check section B. I checked Jerry's, and he does not show a listing for a cam sensor, would you guys know where to find one? Part seems to be superceded. Something about new part has wrong shield. Can old shield be used on new sensor maybe? I just got done cleaning connections and I'm going on a drive now, see what happens, thanks for any info.

05-10-2020	#2
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 540	Re: Code 31 I had this happen on my 92Z. Still haven't fixed it. I pulled it and replaced it with another one and it ran horribly. I put the old one back it and it ran better but it won't accelerate. I've been real busy with another Z but plan to get back to it. Roy __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

05-10-2020	#3
mmkkpro Join Date: Apr 2019 Location: Supply NC Posts: 121	Re: Code 31 Hi Roy, I cleaned the connector and drove it all day and hasn't done it again. Driving her to work tomorrow, will see what happens. It sat for many years so I know there will be some bugs to work out, thanks, good luck with yours.

05-12-2020	#4
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 870	Re: Code 31 My code 31 she would just quit running when driving in town. E we oils start right back up but quite unnerving. I hope you can find a replacement. This is one of the few parts NLA that does not yet have a work around yet. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

05-12-2020	#5
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: Code 31 You can get a new cam sensor from Phil Wasinger on this site.. (Jagdpanzer) I and others bought one from him and it works great. __________________ [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]

05-13-2020	#7
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 870	Re: Code 31 I have Phil’s prototype first one in my car. I can say there have been no issues. I was not sure he was yet building the cam sensor. He is our only hope it seems. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

05-13-2020	#8
mmkkpro Join Date: Apr 2019 Location: Supply NC Posts: 121	Re: Code 31 Thank you guys for letting me know about Phil. I have driven about 200 miles this week so far and have had no more issues. I suspect cleaning the connector helped, so far so good. The tone generator has begun to work, maybe driving her is bringing things alive. My cruse control works, AC, all lights, hatch release, among other systems. Sitting all those years was kinda hard on her, but I think she is happy to be loved and cared for, lol. I plan on going through all electrical connections and clean them up. Thank all you guys for replying.

05-14-2020	#9
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 870	Re: Code 31 Often times unplugging and plugging back makes things work again. High resistance at contact points. Do the simple first. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.