S
secondchance
Guest
Hi, all,
I currently have a 94 ZR-1. Car started to ping right around 2200 to 2800 rpm at moderate acceleration when in closed loop mode about a year ago. Then I noticed a vacuum leak, you guessed it, under the plenuem. All vacuum hoses were replaced and problem went away. Then, about three months ago, she started to ping again around 2200 to 2800 under moderate acceleration, never under wide open throttle, and only in closed loop mode. When hooked up to a scanner, driverside O2 sensor was fluctuating between 40 to 190. So, I replaced the O2 sensor. This did not cure the problem. Furthermore, she started to hesitate under moderate acceleration, again in closed loop mode, and this hesitation seems to be getting worse. I have talked to Mr. Gordon Killbrew and he seems to think the knock sensor have gone bad. I have a knock sensor on order and will be replacing it shortly. Any thoughts?
p.s. I always use 93 octane, either Amoco or Mobile.:confused
I currently have a 94 ZR-1. Car started to ping right around 2200 to 2800 rpm at moderate acceleration when in closed loop mode about a year ago. Then I noticed a vacuum leak, you guessed it, under the plenuem. All vacuum hoses were replaced and problem went away. Then, about three months ago, she started to ping again around 2200 to 2800 under moderate acceleration, never under wide open throttle, and only in closed loop mode. When hooked up to a scanner, driverside O2 sensor was fluctuating between 40 to 190. So, I replaced the O2 sensor. This did not cure the problem. Furthermore, she started to hesitate under moderate acceleration, again in closed loop mode, and this hesitation seems to be getting worse. I have talked to Mr. Gordon Killbrew and he seems to think the knock sensor have gone bad. I have a knock sensor on order and will be replacing it shortly. Any thoughts?
p.s. I always use 93 octane, either Amoco or Mobile.:confused