Compression readings good or bad. 95 Civic Dx 171k miles

my car is suffering from lack of power, i was thinking the compression was horrible, but doesn't look too bad to me.

1 - 150
2 - 145
3 - 145
4 - 135

I am going to change the plugs. distrib cap and rotor, to see what happenes. just to think this is the only car i haven't fucked with, and drove into the ground 171k miles. woot woot.

 

4 seems a little too low, shouldnt all of em be within 5 of each other?

 

did you do those with the engine warm?

 

yes the motor was warm... when tested

 

do it again... make shure the engine is at operating temperature.. pull the ecu fuse.. and unhook the power to the dizzy ... cuz i have heard of people frying coils...

pull all spark plugs...i cant remember how.. or 1 at a time and crank it over till the needle stops moving.. it should be like 5 rotations..

my friend has a 94 del sol with the dx motor in it and 160 thousand on the motor driven hard most of the time and he got 185 183 180 177

 

the motor was tested at operating temp. i drove at least 12 miles on it, pulled the plus and tested. so i belive soon it will be time for a new motor.

 

i have the same problem, lack of power,
all i did was change the coil in the dizzy
and it running better.

 

Boost it and kill it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93egsedan &raquo;</TD></TR><TR><TD CLASS="quote">4 seems a little too low, shouldnt all of em be within 5 of each other? </TD></TR></TABLE>

135 psi is the minimum serviceable compression. 180-185 psi is typical of a good engine. 28 psi is the maximum variation between cylinders. Do a leakdown test to determine if it is the piston rings or the valves that are causing the low compression.

 

thanks for the info jim