Corvette C4 Forum 1984 through 1996

'86 coupe, tapping under car

Old Dec 13, 2006 | 02:29 PM
  #11  
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Default RE: '86 coupe, tapping under car

Thanks! I'm still going to check the fuel pressure this weekend. If that checks out OK, then I'll see about getting the part described in the TSB. Hopefully, then, that'll take care of it.
Take care,
Ed
 
Old Dec 13, 2006 | 06:36 PM
  #12  
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Default RE: '86 coupe, tapping under car

Well, it look like Chevrolet discontinued the "filter-accumulator" kit for the 'vette. This according to two dealerships I called up.
Back to the drawing board...

Ed
 
Old Dec 14, 2006 | 09:21 AM
  #13  
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Default RE: '86 coupe, tapping under car

Sorry, but I could have probably told you that. If it is over 10 years old, GM discontinues a lot. They don't want you to fix it, they want you to buy a new one.[:@]
 
Old Dec 14, 2006 | 09:23 AM
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Default RE: '86 coupe, tapping under car

If you call Summit or JEGS, they may have something that might work. I would suggest a new A/C Delco fuel pump. I have one in my 86 and have no pulsation probs with it. [8D]
 
Old Dec 14, 2006 | 01:25 PM
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Default RE: '86 coupe, tapping under car

ORIGINAL: mech259

Found this:
mech were did you find that. what site..... sounds like a informive site
 
Old Dec 15, 2006 | 01:20 AM
  #16  
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Default RE: '86 coupe, tapping under car

The Direct Hit site is a pay service. Monthly subscription and the rest came from my Alldata at my shop.
 
Old Dec 16, 2006 | 12:38 PM
  #17  
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Default RE: '86 coupe, tapping under car

I had a similar problem...but...it turned out to be a 10 year old raccoon. Apparently chevy thought that was a nice option. I now have to go find a newer one to replace the old one
 
Old Dec 16, 2006 | 08:55 PM
  #18  
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Default RE: '86 coupe, tapping under car

HA! Did you contact the ASPCA?
 
Old Dec 26, 2006 | 09:13 PM
  #19  
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Default RE: '86 coupe, tapping under car

So I finally hook up a fuel pressure gauge to the car.The carhas an adjustable fuel pressure regulator, and the fuel pressure reads 47 psi. The needle bounces back and forth rapidly between 46-48psi. This *might* be the pressure gauge. I think I'm going to reduce the fuel pressure at the regulator and see what that does for me, although I doubt that that is the cause. I'm leaning towards a new fuel pump and "pulsator"...
Ed
 
Old Dec 26, 2006 | 10:46 PM
  #20  
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Default RE: '86 coupe, tapping under car

Stock fuel pressure spec is 32 - 35 lbs @ ilde. If you have stock fuel injectors, pressure is to high. Maybe why you have pulsations.
 

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