Sputtering in engine bay
Thread Starter
Drifting
Joined: May 2002
Posts: 1,562
Likes: 1
From: "Drive like Hell, you'll get there faster." Tucson AZ
Sputtering in engine bay
I just changed the IAC motor and the engine sounds and runs near perfect now, but there's still a wierd *** sputtering sound coming from the engine bay(it was there before I changed the IAC and cleaned out the TB). Sounded like a belt maybe, so I put some belt conditioner on it, but its still there. Almost sounds like either a fan creeking subtly or a part near the alternator? Sounds like somethings subtly hitting a pinwheel when the engine runs....dunno how else to describe it. I checked and dont see anything loose getting caught in any moving parts. Any guesses? BTW... it's a '90
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
I found that a mechanic's stethoscope (cheep) really comes in handy when trying to isolate the source of various sounds emanating from under the hood. Just place the tip of the "feeler" near the bearings of the various gizmos (alternator, belt tensioner, etc) and if it is a bearing, for example, there'll be no mistaking it.
Just a thought.
P.
Just a thought.
P.
Le Mans Master
Joined: Dec 2003
Posts: 5,768
Likes: 33
From: Van Steel Corvettes
St. Jude Donor '12-'13
This would rule out any bearing issues with the A/C or alternator. My alternator made a horrific noise when the bearings went out...made a funny noise leading up to that but I don't remember what it sounded like. Good luck. 
