Code 61 - ZR-1 Net Registry Forums

John Boothby · 09-15-2010

I have replaced my entire secondary vac system including all actuators, solenoids and check valves. I get the "Service Engine Soon" light even though the secondary parameters are not met, ie: rpm 3K and throttle to the floor. The temps are up though. I can be cruising at 65-70mph 2k rpm and if I hit a small grade and slightly increase the throttle, (below 3k) I will get the light. About a month after I replaced all the secondary components I got this light and traced it back using the FSM to the secondary solenoid under the front of the plenum. I replaced it and all was well until now. I am getting tired of r&r ing the plenum. Could it be a MAP sensor? I have a DRM chip, type unknown. I have checked the plumbing with a hand vac and all checks ok. I am getting frustrated!!

GOLDCYLON · 09-15-2010

John last time I had this the secondary actuator rod was cracked at one of the screw points. The rod had actually failed. Did you remove your actuators when you hand pumped them. Are they pulling off to one side or straight as they should be ?

John Boothby · 09-15-2010

I did not remove them when I vac tested them, but they are new. They worked though. The starboard side actuator is a little stiffer than the portside. They look like they are pulling straight, but I do not know how to tell if one is reversed?

rhipsher · 09-15-2010

If you replaced the secondary vacum solenoid and everything was fine but not now then it's entirely possible that it could have gone bad. There's no way to know how many years it sat on a shelf before you got it. There is a ZR-1 member on the other forum who also lives in Sin City that I sold an actuator to that has done quit a bit of his own work on his. What I would suggest is you two get together and swap your vacum solinoid with his and see if there is any difference. It wouldn't be the first time sombody got an NOS part and it was bad. Let me know and I'll give you his contact info.

GOLDCYLON · 09-15-2010

Quote:

Originally Posted by John Boothby

I did not remove them when I vac tested them, but they are new. They worked though. The starboard side actuator is a little stiffer than the portside. They look like they are pulling straight, but I do not know how to tell if one is reversed?

Unfortunately these have a high failure rate new right out of the box (ask me how I know) My problem was the port throttle rod that the black pieces connect too. The SES light always came on with Accel and then went away after my foot came of the throttle. Check the long linkage rods in there (Both sides)

John Boothby · 09-15-2010

Quote:

Originally Posted by rhipsher

If you replaced the secondary vacum solenoid and everything was fine but not now then it's entirely possible that it could have gone bad. There's no way to know how many years it sat on a shelf before you got it. There is a ZR-1 member on the other forum who also lives in Sin City that I sold an actuator to that has done quit a bit of his own work on his. What I would suggest is you two get together and swap your vacum solinoid with his and see if there is any difference. It wouldn't be the first time sombody got an NOS part and it was bad. Let me know and I'll give you his contact info.

Give me his contact info. I don't use the other forum.

Quote:

Originally Posted by Dynomite

This vacuum canister is on a 91' Z.

http://www.zr1.net/forum/showthread....3330#post83330

It's a 90. Not the canister, the actuators.

Thanks for the replies.

John Boothby · 09-15-2010

Jerry, get the gaskets ready, looks like another plenum pull!!

A26B · 09-15-2010

John,

Just saw Code 61 is the title of the thread...... duh.

Do you have the service manual to follow the diagnostic flow chart?

John Boothby · 09-15-2010

I use a Tech-1A. Code 61 is the only code showing. I have cleared the code using the Tech-1A. The thing I am trying to understand, is that the SES light will come on and throw a code 61 even though the parameters have not been met to initiate the secondaries. I have used the FSM to diagnose the problem before and it was the secondary solinoid. I replaced it with a new one from White Racing and everything was ok for awhile, but now I get the SES light again. I guess I am just trying to avoid another plenum pull.

A26B · 09-15-2010

John,

Quote from the Service manual:
"During NORMAL engine power operation, (secondary operation disabled) a DTC 61 will set if any vacuum is present at the air inlet valve actuators. When DTC 61 is set, engine speed is limited to 3,000 RPM."

I haven't taken the time to try & review all the diagnostics to see what else besides the solenoind valve, might be involved (secondary vacuum sensor, etc.) Just thought I would tell you what I found regarding a DTC 61 in normal conditions, i.e. no full power operation.

Hope this helps a little bit.

09-15-2010	#1
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Code 61 I have replaced my entire secondary vac system including all actuators, solenoids and check valves. I get the "Service Engine Soon" light even though the secondary parameters are not met, ie: rpm 3K and throttle to the floor. The temps are up though. I can be cruising at 65-70mph 2k rpm and if I hit a small grade and slightly increase the throttle, (below 3k) I will get the light. About a month after I replaced all the secondary components I got this light and traced it back using the FSM to the secondary solenoid under the front of the plenum. I replaced it and all was well until now. I am getting tired of r&r ing the plenum. Could it be a MAP sensor? I have a DRM chip, type unknown. I have checked the plumbing with a hand vac and all checks ok. I am getting frustrated!! __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers:

09-15-2010	#2
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: Code 61 John last time I had this the secondary actuator rod was cracked at one of the screw points. The rod had actually failed. Did you remove your actuators when you hand pumped them. Are they pulling off to one side or straight as they should be ? __________________ 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

09-15-2010	#3
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Re: Code 61 I did not remove them when I vac tested them, but they are new. They worked though. The starboard side actuator is a little stiffer than the portside. They look like they are pulling straight, but I do not know how to tell if one is reversed? __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers:

09-15-2010	#4
rhipsher Join Date: Aug 2008 Location: Houston 90 Red ZR-1 Posts: 2,320	Re: Code 61 If you replaced the secondary vacum solenoid and everything was fine but not now then it's entirely possible that it could have gone bad. There's no way to know how many years it sat on a shelf before you got it. There is a ZR-1 member on the other forum who also lives in Sin City that I sold an actuator to that has done quit a bit of his own work on his. What I would suggest is you two get together and swap your vacum solinoid with his and see if there is any difference. It wouldn't be the first time sombody got an NOS part and it was bad. Let me know and I'll give you his contact info.

09-15-2010	#7
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Re: Code 61 Jerry, get the gaskets ready, looks like another plenum pull!! __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers:

09-15-2010	#8
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	Re: Code 61 John, Just saw Code 61 is the title of the thread...... duh. Do you have the service manual to follow the diagnostic flow chart? __________________ 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. Last edited by A26B; 09-15-2010 at 03:15 PM.*

09-15-2010	#9
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Re: Code 61 I use a Tech-1A. Code 61 is the only code showing. I have cleared the code using the Tech-1A. The thing I am trying to understand, is that the SES light will come on and throw a code 61 even though the parameters have not been met to initiate the secondaries. I have used the FSM to diagnose the problem before and it was the secondary solinoid. I replaced it with a new one from White Racing and everything was ok for awhile, but now I get the SES light again. I guess I am just trying to avoid another plenum pull. __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers:

09-15-2010	#10
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	Re: Code 61 John, Quote from the Service manual: "During NORMAL engine power operation, (secondary operation disabled) a DTC 61 will set if any vacuum is present at the air inlet valve actuators. When DTC 61 is set, engine speed is limited to 3,000 RPM." I haven't taken the time to try & review all the diagnostics to see what else besides the solenoind valve, might be involved (secondary vacuum sensor, etc.) Just thought I would tell you what I found regarding a DTC 61 in normal conditions, i.e. no full power operation. Hope this helps a little bit. __________________ 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.