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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Okay, got the car back now...

  • Thread starter Thread starter smitty_64
  • Start date Start date Nov 16, 2006

smitty_64

New Member
May 27, 2006
75
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0
Nov 16, 2006
#1
  • Nov 16, 2006
  • #1
All,

I had all the tuning and horsepower questions, but now I have the car back. Still doesn't seem to have the horsepower I should expect from a Stroker and the idle sticks at 1500 after pressing the clutch for about 10 seconds before it idles down to 1000. When I turn off the ignition, there is a hissing sound, kind of like a pressure relief valve (yes, I know there isn't such a thing in cars). The sound comes from down around the intake gasket or valve cover. My guess is this is a vacuum leak that is not only manifesting itself in the idle hanging but also stealing my horsepower. The tune is right now. Am I right, or is it normal to hear that sound with my combo?

Greg
 

1TallMF

New Member
Apr 17, 2006
955
1
0
Montreal
Nov 16, 2006
#2
  • Nov 16, 2006
  • #2
I hear this hissing sound on my car on occasion after shut down. I figure its one of the pistons stopping at the top of the compression stroke, and air is slowly decompressing at the valves and/or piston rings. Could be air coming back out the intake from this. I'm not sure though
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
19
99
Louisiana
Nov 16, 2006
#3
  • Nov 16, 2006
  • #3
I hear a hissing on my stock 302.
 

94gts

Member
Jul 4, 2004
873
0
16
Carmel, New York
Nov 16, 2006
#4
  • Nov 16, 2006
  • #4
i heard a HUGE hissing from a mercury sable that i had to move at work today when i shut it off. i never have been able to figure out what that noise is
 

smitty_64

New Member
May 27, 2006
75
0
0
Nov 17, 2006
#5
  • Nov 17, 2006
  • #5
Well, I don't know that I am that worried about either of these problems since I scared a Cobra today, but one thing I am noticing is that the idle will fall to 1000 as soon as the car comes to a complete stop. May still be the shift retard that others have mentioned. As far as the hissing, the builder wants the car back in Monday to change and check the oil and put it back on the dyno again now that most of the problems have been straightened out. I'll let him listen to it.
 

stprorolla49

Active Member
Oct 9, 2004
1,455
15
39
Fairfield, CT/North Jersey
Nov 18, 2006
#6
  • Nov 18, 2006
  • #6
the hissing is something in the air intake...it happens to me to, and its more evident with a cai...
 
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