|
06-19-2017
|
#1 |
|
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
|
Sooty #7
Recently, I started experiencing a case of gray/blackish exhaust exiting the rear. Motor no breaking up. And at first I chalked it up to car sitting around during the winter. Blowing out some carbon. But it has continued. But only when I go WOT.
I pulled some plugs for a compression check and #7 was not in good shape. It was pretty black and sooty. I replaced the plugs and did about 700miles to MI this weekend. Car ran great, ~ 24-25mpg. Pulled new #7 plug and again sooty. Checking plug wire and injectors w engine hot: Injectors (primary/secondary) both check out at ~15ohms HoT. Also checked plug wire resistance thru coil HOT, 14Kohms end to end. Same as other cylinder pairs. #7 also tested out at 220psi which put it a bit below the 228psi average for the 8 cylinders. Compression was: Lft Rgt 235 235 210 230 215 245 220 240
__________________
[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 Last edited by XfireZ51; 06-19-2017 at 06:16 PM. |
|
|
| Thread Tools | |
| Display Modes | |
|
|
Threaded Mode