LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Rattle

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Old Oct 20, 2003 | 12:56 PM
  #1  
darkoverlift's Avatar
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Rattle/Gas

I don’t know if you can describe it as a rattle, but something is making noise in drive from the rear of the car. My first, thoughts are Exhaust is loose, but just looking at it is appears to be solid. It is stock and I have 83K on her. It is just a funky noise that occurs well in gear sitting at a light ect… Never occurs when just parked and idling. It is somewhere behind the rear seats.

Any suggestions on things to check?


Also, I need to order a 1le elbow to repair my current tear in mine. Where is the cheapest place to get one.

P.S
I have been using 93 Octane. I recently looked in the manual and it says 91 is fine. Further looking it says I can run 87, but I have heard horror stories of people who use less than 93. Are there any cold hard facts stating we should always use 93 or is 89 or 87 okay?


I get poor mileage now with 93; 200 per tank, I used to get 278, but I think the cats are getting clogged. I think. I know I had a low voltage reading from the rear O2 awhile back, but cleared the code a few times and it has not come back.

Last edited by darkoverlift; Oct 20, 2003 at 01:06 PM.
Old Oct 20, 2003 | 01:18 PM
  #2  
darkoverlift's Avatar
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ttt
Old Oct 20, 2003 | 10:58 PM
  #3  
Fatdog's Avatar
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Joined: Nov 1998
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From: valencia,california,u.s.a.
Cool

Might try wrapping electrical tape around the posts where the rear seat latches onto.(rattle)
Jason Cromer@ Gmparts.com/html/parts.html===Phone 877-726-8295 or 850-243-8826 (Florida)
Also Dal Slabaugh (Ohio)877-448-5451==@---Lockitup@bright.net
Can save you big buckaroos.
I would stay with 91 octane at least.(87 if you don't get on it,but hey,someday you might want to blast the car,and you might have engine problems with the lower octane.)Hope this helps.
(Just a note.My dealer in town wanted $149.99 for the bellows,plus tax,Dal shipped the same genuine part to my home for$56.00,about 4 years ago.)
Old Oct 21, 2003 | 12:01 AM
  #4  
ead94z28's Avatar
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Joined: Aug 2003
Posts: 450
From: Maryland
Might want to check your heat shields for the rattle.
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