Just a few GM TPI Questions

[George M. Dailey]

FYI, my '58 chevy likes the '89 5.7L TPI engine. Performance is very good.

Should there be a very slight detection of detonation (knock) at idle with
engine hot?
What about slightly moderate knock at full throttle going say...70mph?
NO code 42, or other est codes are present, 42 will set when 'set timing'
connector is disconnected.

Has any one noticed bad idle quality when the air cleaner is not installed
(MAF was connected)? The problem seems to have 'fixed' itself after
instaling the air cleaner and one of the missing PVC hoses. Could fine dirt
affect a hot wire MAF?

Thanks,
GMD