Originally Posted by JamboRST
Originally Posted by safechav
If you cracked the intercooler there would be a leak, and ERST's wont run with air leaks....

not always the case,my intercooler had a small drill hole in the bottom to clear any oil from a blown engine,still runs fine
But are/were you running KE jetronic. As much as leaving the mixture screw uncovered can have dramatic effects on the running of the car, not to mention the extra fuelling needed to get the mixture right.........
Sorry to have to say it but whoever drilled a hole in the intercooler obviously isn't the worlds deepest thinker.