ECM Code 61 - ZR-1 Net Registry Forums

jrd1990zr1 · 05-31-2011

Went out for a short ride tonight, coming down an acceleration ramp I put my foot into it, felt like the secondaries kicked in for a short time then the car seemed to buck a little and the dreaded "Service Engine Soon" light came on. Backed off the pedal and in a few seconds the "Service Engine Soon" light disappeared. When I got home I pulled the ECM codes and got a Code 61. According to Gordon's book this is a Secondary port throttle valve system fault.

I also noticed when I turned the key on to start it again the vacuum pump is running constantly. I checked the pump, it is holding vacuum. Problem seems to be a leak under the plenum.

Before I pull the plenum I was wondering if any one else had this problem before and is it possible I have a bad secondary port throttle solenoid??? Could it be one bad actuator with a leak???

Any advice, thoughts or suggestions?? I need to get this fixed before the Northeast group goes to Lime Rock.

Thanks, John

05-31-2011	#1
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 916	ECM Code 61 Went out for a short ride tonight, coming down an acceleration ramp I put my foot into it, felt like the secondaries kicked in for a short time then the car seemed to buck a little and the dreaded "Service Engine Soon" light came on. Backed off the pedal and in a few seconds the "Service Engine Soon" light disappeared. When I got home I pulled the ECM codes and got a Code 61. According to Gordon's book this is a Secondary port throttle valve system fault. I also noticed when I turned the key on to start it again the vacuum pump is running constantly. I checked the pump, it is holding vacuum. Problem seems to be a leak under the plenum. Before I pull the plenum I was wondering if any one else had this problem before and is it possible I have a bad secondary port throttle solenoid??? Could it be one bad actuator with a leak??? Any advice, thoughts or suggestions?? I need to get this fixed before the Northeast group goes to Lime Rock. Thanks, John __________________ 1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold)