What internally could causes surge at idle
I’ve seen this twice on two different vehicles. Both had a Holley TB. Holley had a big run of mis-matched air feed holes for the IAC circuit. We tried new IAC’s…same as you…with no improvement. Both times we bought a new Nick Williams TB and it was instantly fixed. Google Holley TB IAC issues. You’ll see what I’m talking about. The NW TB is pricey, but you’ll practically tear up when you hear it run right again. Priceless…
Last edited by Che70velle; Nov 19, 2022 at 12:16 PM.
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I’ve seen this twice on two different vehicles. Both had a Holley TB. Holley had a big run of mis-matched air feed holes for the IAC circuit. We tried new IAC’s…same as you…with no improvement. Both times we bought a new Nick Williams TB and it was instantly fixed. Goog Holley TB IAC issues. You’ll see what I’m talking about. The NW TB is pricey, but you’ll practically tear up when you hear it run right again. Priceless…
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Verdad Gallardo Quick update…installed a factory TB on a stock LS6 intake and still no change in the surge. Also, went ahead and swapped out the TPS and it seems to not be as bad of a surge but it’s still a problem. It may just be me looking for hope. I called another tuner today and told him the issue. He said that he actually has seen this from this tuner. He said he could get it fixed so fingers crossed he will get it lined out.
Quick update…installed a factory TB on a stock LS6 intake and still no change in the surge. Also, went ahead and swapped out the TPS and it seems to not be as bad of a surge but it’s still a problem. It may just be me looking for hope. I called another tuner today and told him the issue. He said that he actually has seen this from this tuner. He said he could get it fixed so fingers crossed he will get it lined out.
I’ve seen this twice on two different vehicles. Both had a Holley TB. Holley had a big run of mis-matched air feed holes for the IAC circuit. We tried new IAC’s…same as you…with no improvement. Both times we bought a new Nick Williams TB and it was instantly fixed. Google Holley TB IAC issues. You’ll see what I’m talking about. The NW TB is pricey, but you’ll practically tear up when you hear it run right again. Priceless…
He didn’t bring up any abnormal problems. He said it was no issues when he tuned it other than needing an O2 sensor. He didn’t drill the TB or anything. He said he’s had other cars from the other tuner, and the guy just doesn’t know how to tune a stock pcm. Now I’m on to the next project. Been having too much fun in it, and I just blew the ring gear. Yay me!!