help troubleshooting a sound
 

the car is finally running great, although I HAVE to use a $5 bottle of Bordahls Knock Out with every gas tank (only that brand for some reason)...anyhow, now that i do not have pinging noises, i now can hear something else wierd. The only way I can describe it is years ago, i had a turbo dodge shadow. It made a sort of fluttering/whirrling turbo noise. NOW my car makes that similar noise? Vacuum leak? it is more high pitched than say a clunky/mettalic noise. Only makes it on wide open throttle, and if during the sound, I let off a bit and hit it again, it goes away. It is not gear whine either...definitely coming from engine bay.

wish i could help, but not sure, although alternators are known to make noises like you explained, my car has an accel coil on it, and i can hear some noises from it, and im about to go with a stock one.

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90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607

next mods: subframes, mac h-pipe

I used to hear a high pitched whining noise from my engine. Turns out it was my EGR, and the noise was higher and lower as I drove and slowed down. My car was running pig rich, and it still had some unburnt gas in it, so I guess it caused the EGR to do that. I switched FPRs and leaned it out and it went away. Maybe that additive you use is causing it.

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Clint L.
White 95 Cobra #3637
58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW LCAs, Kenny Brown super subs, Steeda CC plates, aluminum driveshaft, Steeda quadrant, B&M ripper, Kirban FPR, MSD6A, Taylor wires, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s
13.61 @ 104.7 w/ 2.22

TEX, it could be the additive, but unless I use it, I get pinging so bad you can't hear anything else...so, using the additive makes the ping go away, but now I hear the whirrling noise. What does an exhaust leak sound like?