Engine diagnostics using engine vacuum

[XfireZ51]

Originally Posted by 9T1 Red ZR1

How much vacuum should you read on a stock 1991 at idle?

Should be in the 40+kPa range. With cams mine idles between 50-55 kPa.

[Roadster]

Good info......
Will be very helpful when checking out and tuning the 82....

[XfireZ51]

Originally Posted by Roadster

Good info......
Will be very helpful when checking out and tuning the 82....

I owned an 84 for 24 years. Balancing the TBs was important in getting a smooth idle and throttle response.

[Roadster]

Originally Posted by XfireZ51

I owned an 84 for 24 years. Balancing the TBs was important in getting a smooth idle and throttle response.

I have been lucky, having the 82 3 years next month and 60,000 miles later, have not touched the TB's and still running great!!!