4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

compression test in progress

Thread Tools
 
Search this Thread
 
Old Mar 31, 2007 | 11:42 PM
  #1  
Fuel's Avatar
Fuel
Thread Starter
4th Gear Member
 
Joined: Oct 2006
Posts: 1,443
From: Elgin, NE
Default compression test in progress

so my car has 198k miles on it so i decided to do a compression test just to see where i am at

i have done 2cylinders so far and both have been at about 95psi, is this really low or high or what

i will keep u posted as i get done, would just like to know what u guys think
Old Apr 1, 2007 | 12:18 AM
  #2  
Fuel's Avatar
Fuel
Thread Starter
4th Gear Member
 
Joined: Oct 2006
Posts: 1,443
From: Elgin, NE
Default RE: compression test in progress

anyone know where these numbers should be all cylinders are running around 85-95psi
Old Apr 1, 2007 | 12:58 AM
  #3  
Fuel's Avatar
Fuel
Thread Starter
4th Gear Member
 
Joined: Oct 2006
Posts: 1,443
From: Elgin, NE
Default RE: compression test in progress

so all of the cylinders put up 85-95 psi, is this really low, am i going to have to do a rebuild with an overbore?
Old Apr 1, 2007 | 01:02 AM
  #4  
01GT4.6's Avatar
01GT4.6
6th Gear Member
 
Joined: Mar 2007
Posts: 5,726
From: Slidell, Louisiana
Default RE: compression test in progress

not sure what stock is supposed to be, I put down 195-200 to all 8, but I have 11:1 CR.
Old Apr 1, 2007 | 04:33 AM
  #5  
FDNYBullitt's Avatar
FDNYBullitt
2nd Gear Member
 
Joined: Apr 2006
Posts: 417
From:
Default RE: compression test in progress

If it seems to run good and its not burning any oil, I'd try a different gauge. Those #'s sound a bit low andtoo even with that many miles on it and running good, good luck.
Old Apr 1, 2007 | 04:38 AM
  #6  
99StangGTTN's Avatar
99StangGTTN
2nd Gear Member
 
Joined: Feb 2007
Posts: 398
From:
Default RE: compression test in progress

85-95 is very low on compression.
Old Apr 1, 2007 | 05:59 AM
  #7  
2000GT4.6's Avatar
2000GT4.6
6th Gear Member
 
Joined: Jan 2004
Posts: 12,575
From: United States
Default RE: compression test in progress

Strange though that they are all about the same, that usually means everything is ok.

195K miles though... damm. Its time for a PI engine (complete) swap!
Old Apr 1, 2007 | 12:16 PM
  #8  
lizzyfan's Avatar
lizzyfan
Underboss
 
Joined: Jan 2006
Posts: 20,272
From: Helaware
Default RE: compression test in progress

ORIGINAL: 2000GT4.6

Strange though that they are all about the same, that usually means everything is ok.

195K miles though... damm. Its time for a PI engine (complete) swap!
That would be probably the cheapest/smartest way to go!
Old Apr 1, 2007 | 02:20 PM
  #9  
Fuel's Avatar
Fuel
Thread Starter
4th Gear Member
 
Joined: Oct 2006
Posts: 1,443
From: Elgin, NE
Default RE: compression test in progress

thanks for the opinions guys
Old Apr 1, 2007 | 02:25 PM
  #10  
2000GT4.6's Avatar
2000GT4.6
6th Gear Member
 
Joined: Jan 2004
Posts: 12,575
From: United States
Default RE: compression test in progress

The car does look sharp though in your pic. I have always liked that bright orange color.



All times are GMT -5. The time now is 02:34 AM.