05-13-2012 | #11 |
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,193
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Re: Is you Knock sensor taking performance down for the count?
never saw one on the 92 when it was off..
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
05-13-2012 | #12 |
Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Is you Knock sensor taking performance down for the count?
Yes, this should trigger a code 43.
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
05-13-2012 | #13 | |
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Re: Is you Knock sensor taking performance down for the count?
Quote:
1. Eng temp above 194deg F. 2. at or near WOT (high load) So, based on this circuit description it is entirely possible to not get a code 43 when the sensor is unplugged.
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Scott Vett owner since 1979._It's about the car and the people |
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05-14-2012 | #14 | |
Join Date: Feb 2008
Location: Vancouver, BC
Posts: 252
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Re: Is you Knock sensor taking performance down for the count?
Quote:
So..... if you drive like a granny (I can assume LGAFF does not qualify on this count), OR you've changed your thermostat and/or fan cut-in - you won't get a DTC? I dunno - I have early activation of my fans and I still see temps > 200. Sounds like I need to disconnect the sensor and see what happens.
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[SIGPIC][/SIGPIC] __________________ 1990 Corvette ZR-1 #2824 4.10's, Custom PROM, Flowmaster, Top End Port NCRS BC Chapter Last edited by gbmidyear66; 05-14-2012 at 03:18 AM. |
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05-14-2012 | #15 | |
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Re: Is you Knock sensor taking performance down for the count?
Quote:
I can tell you that yesterday I hit WOT at above 200 several times on the way back from Home Depot because I chose to go to the one that is a few miles farther away than the one nearest me. I did this ostensibly to test to see if I'd get a 43 but also as an excuse to feel the WOT and to save some $ by shopping in a "no sales tax" US state
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Scott Vett owner since 1979._It's about the car and the people |
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07-15-2013 | #16 |
Join Date: Jul 2013
Location: Toledo
Posts: 17
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Re: Is you Knock sensor taking performance down for the count?
Bring up this thread again. Got a 92 zr1 here has a code 43. Suspecting a knock sensor issue. OHMed the sensor and it is at 3.891k. Customers car not sure of full repair history on it. Know all primary and Secondary injectors have been replaced over the past 3 years, and the fuel regulator was replaced last year. Just don't seem to have the power it should. Any suggestions would be helpful as i don't see to many of these.
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07-15-2013 | #17 |
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,193
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Re: Is you Knock sensor taking performance down for the count?
Is your ASR light or other lights coming on? I had a crack in the board of my chip for the knock sensor
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
07-15-2013 | #18 |
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,679
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Re: Is you Knock sensor taking performance down for the count?
Did you or somebody replace knock sensor?
You might have a 1990 knock sensor. I will check and get back to you later. Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
07-16-2013 | #19 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,704
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Re: Is you Knock sensor taking performance down for the count?
Have a read on this thread for some additional explanation. It's not a matter of knock, it's a matter of the knock sensor circuitry being operational. You don't get a MALF code if knock is occurring.
http://www.thirdgen.org/techboard/di...de-43-esc.html
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[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 |
07-16-2013 | #20 |
Join Date: Jul 2013
Location: Toledo
Posts: 17
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Re: Is you Knock sensor taking performance down for the count?
I did see the service ASR light come on yesterday, but it isnt on now. The service ride control light will go on and off while driving but it did that last year also. This all started as a feeling of a miss in power mode when you get on it. I checked the injectors and had 2 secondary injectors at 8 ohms the rest were 12.6. I replaced the 2 bad ones and suggested we replace the other 2 secondaries that were OE. So over the past 3 years all 16 injectors have been replaced. The car was running like it should fast and strong, it then sat for 2 weeks till the owner came, when he picked up the car he said it was running rough and thought maybe it just needed to be driven. Now it acts like its missing on hard accel in both power and non power modes. Like injectors are messed up again. I put my solus pro on it and found a 43. hit up google and found you guys. cleared the code and havent seen it back on yet but haven drove it either. Can feel the miss or stumble just goosing it in the bay.
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