2004 Mazda B2300 Q&A
2004 Mazda B2300 Question: Loud noise in engine
When first excellerating engine feels like it is missing (not very noticable though). When speed is about 40mph the engine produces a very loud "roar" sound- no knocking or pings, just roar. The roaring sound will stop when speed is reduced but begin again as speed in increased. There is no loss of power, no exhaust smoke or smell. Regular maintenance is kept up and there is only about 60K miles on truck. I am the origional owner and do not drive this truck very hard. Any ideas? - Faye2020
Have a shop check your fan clutch because when these go bad they will make a roaring sound as engine RPM's pick up, about $58 at www.napaonline.com - bigblockchevy
Cut your catalyser, they tend to clog big time - Visitor
This occurs all the time
Installed new fuel pump,fuel filter,new injectors,2 new coil packs,clean out gas tank. Loud chatter noise from drivers side front of engine.Sounds like cranky injectors.Change injectors out again 1...