help troubleshooting a sound

slo95 · 05-14-2001, 08:36 AM

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.

90dpscoupe · 05-14-2001, 10:59 AM

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.

------------------
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

TEXSN95 · 05-14-2001, 01:16 PM

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.

------------------
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

slo95 · 05-14-2001, 02:00 PM

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?

05-14-2001, 08:36 AM	#1
slo95 Registered Member Join Date: Dec 2000 Posts: 168	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.

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05-14-2001, 10:59 AM	#2
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	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. ------------------ 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

05-14-2001, 01:16 PM	#3
TEXSN95 Registered Member Join Date: Mar 2001 Location: college station, tx Posts: 143	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. ------------------ 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

05-14-2001, 02:00 PM	#4
slo95 Registered Member Join Date: Dec 2000 Posts: 168	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?