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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
Hi "Pontisteve".; I have that kind of noise. Like marbles in the can but only after the engine is hot (20 minutes driving). Only under certain load (light load) to keep constant speed 30-40mph at arround 1500 rpm. No noise in N or Park.
Do you have that noise when the engine is cold?
Only on closed loop/warm engine
I feel flat idle drop from 700 to 500 every 30 seconds after the engine is warm. It runs fine when drive and can go to redline rpm. MAF was cleaned several times with no luck and p0171 comes and goes without by itself. Could it be the O2 sensor? But there is...
