someone enlarged idle airhole on throttle plate
12-18-2016, 12:23 PM
#1
someone enlarged idle airhole on throttle plate anyone kn ow if this would be a problem? it got drilled out to 13/64 ,have
another one that"s untouched it"s 5/32 ,I hate buying stuff off the internet! thanks.
another one that"s untouched it"s 5/32 ,I hate buying stuff off the internet! thanks.
12-18-2016, 02:03 PM
#2
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Yes, this will be a problem. If you don't have a setup that requires an enlarged hole (most don't with proper tuning) then you will have issues with idle hang and "cruise control effect". I've fixed these with JB Weld in the past (filled hole, redrill to stock size) and had no issues, some people don't trust that method though.
01-01-2017, 11:25 PM
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I had a similar issue and just took a ball peen hammer and gently pounded the perimeter of the hole to thin and deform the aluminum to reduce the diameter. Obviously this was after I removed the throttle blade and put it on a hard flat surface. Not pretty but It got the job done.
02-03-2017, 12:27 AM
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Additional airflow to help stabilize the idle for some aftermarket cam profiles. This was a typical method used when custom tuning was still very unrefined for these cars. You could also adjust the set screw some, but by enlarging the hole you achieve the same effect without causing any TPS related issues.