LOUD VIOLENT SUCKING SOUND!!HELP!!
Thread Starter
Member
Joined: Oct 2000
Posts: 195
Likes: 0
From: Ct. USA
LOUD VIOLENT SUCKING SOUND!!HELP!!
HELP!! I got a loud violent sucking sound coming from my Elelbrock baseplate region. I put spray everywhere, and cant seem to pinpoint it. Is it the IAC, or something else? Its a 1988 formula w/FULL mods. Still have the stock chip though.. Thanks in advance!!
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"Ever notice how imports sound like weedwackers"
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"Ever notice how imports sound like weedwackers"
Senior Member
Joined: May 2000
Posts: 980
Likes: 1
Get a piece of hose... put it your hear and snoop around the engine with the other end. It helps a lot to pinpoint noises 
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92 Z28 L98 350
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Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
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92 Z28 L98 350
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Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
Senior Member
Joined: Jun 2000
Posts: 599
Likes: 0
From: Glenbeulah, WI
Car: 1988 Firbird
Engine: 406
Transmission: T-56
Axle/Gears: 4.10
Check your power brake booster line ti the plenum, maybe it came off or is leaking.
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1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29
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1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29
Member
Joined: Sep 1999
Posts: 207
Likes: 0
From: Amarillo TX usa
my car also makes a violent sucking sound that started right after i put the edelbrock throttle body on the IAC works fine it is just the 52mm throttle body. if i put my finger over the hole to the IAC circit and wait for a minuet then release my car screams up to 3000 rpm and the sucking sound is so loud it hurts your ears.
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90 iroc l98
last season best corected 13.62 @102
mods
full exhaust, AFPR, pulley, jet stage 1 chip, billet servo, 52mm throttle body and a few other little things.
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90 iroc l98
last season best corected 13.62 @102
mods
full exhaust, AFPR, pulley, jet stage 1 chip, billet servo, 52mm throttle body and a few other little things.
Junior Member
Joined: Feb 2000
Posts: 85
Likes: 0
From: New Mexico
Car: 85 Mercedes 500SEL
Engine: 5.0 DOHC
Make sure the vacuum hose is on your fuel pressure regulator. I left mine off and got that sucking/screeching sound too.
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85 IROC,5.0 TPI,T-Tops,fully loaded,black with red Lear-Siegler "Camaro" interior,Decal Delete,91 Bose stereo,Stage 2 Fastchip,AFPR,TB Airfoil,K&Ns,March pulleys,Alum. Driveshaft,92 police version 700r4
"The Devil drives a Camaro"
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85 IROC,5.0 TPI,T-Tops,fully loaded,black with red Lear-Siegler "Camaro" interior,Decal Delete,91 Bose stereo,Stage 2 Fastchip,AFPR,TB Airfoil,K&Ns,March pulleys,Alum. Driveshaft,92 police version 700r4
"The Devil drives a Camaro"
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