'03 with 175,000 miles. Stock exhaust and Super Chips. Super Chips in the tow safe mode. Allison automatic. Surges when cold, for the old time Detroit mechanics, soulds just exactly like an old 8 V 71 when its cold. RPM surge up to 1200 and then immediately drop to idle, 3 seconds later, does it again. Doesn't do it when hot/warm. Been getting worse lately. Stock fuel filter (new filter) with a Racor ahead of it.
Thoughts? Ideas? Comments?
Thoughts? Ideas? Comments?