When I start the car and its still cold, it runs fine until it warms up. I get this howling noise coming from passenger side of the engine, oppisite side of the belts and pullys so I kinda ruled out water pump. I have no leaks of any kind and the car still runs good. I cant find any vacuum leaks with soapy water and stethescope. it started small, but now comes on as soon as the car warms up. its seams its coming from the vaccum control box area or right around throttle body and fire wall. the sound is like a heavy teapot noise that goes away when I accelerate or push on the gas, but soon appears again.
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Re: 93 honda accord howling noise coming from engine
Hi try taking the air filter pipe off the throttle body see if the butterfly spindle has no play in the spindle or the retaining screws that hold it to the spindle have not come loose just put your finger on the butterfly while its idling see if the noise goes if not just pinch the vacuum hose on the vacuum box see if noise goes or changes pitch yates210456
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have the cooling system pressure tested to 20 psi remove the spark plugs & see if any water/coolant comes out of the spark plug holes. You may have a cracked cylinder head or partially blown head gasket.
was there a solution to this one? my 93 accord lx is having the same trouble except it wont start at all now. ive got gas and spark and will crank but not start. wont throw a trouble code either just get the flashing CEL and clicking from control box which stops when the egr purge connector is opened. does anyone know the sequece of the egr/evap system. seems like something is getting hung up there. thanks
it may be idle control sensor or a bad mas air flow sensor--maf sensor in otherwords. or could be engine misfire at cold temp. start. only time when cold? or does run better when warm? try warming engine to operating temperature before driving,if problem removes it's self after warm up,up grade gas to 93 octane for 1 tank full. then see if problem goes away. it's cold where you are right? if so the fuel needs to be at least midgrade 89 octane fuel because 87 octane fuel will not start your honda correctly at cold temps. in cold weather 93 or super gas octane will start ,no problem,low octane fuel sometimes gels, or freezes at low temps. if in warm climate, change the fuel filter, add fuel injector cleaner to your fuel tank[preferablly lucas fuel treatment] this will lube your fuel injectors and give better fuel mileage. thank you for choosing fixya.com