can anyone tell me how to do a compression test to my 91 civic lx

 

Do you have the compression test gauge first off? PM me and Ill send you a list of what to do.

 

Its pretty straightforward..

Pull the plugs, then screw in the tester. Crank the engine and then record the results.

Easy as that.

 

Its not exactly that straight forward... well... to test it yes... but what do those little #s mean?

Your compression is good if there is not a variation of more than 5psi overall. For example; you test all 4 cyl and get this reading; 180, 180, 181, 176... then this would be a good reading.

But, If it turns out like this; 180, 170, 179, 176, then it would mean that you have improper compression and would probably need new rings and or head gasket.

Hope this helps.

 

take out plugs, disconnect ign. (that should shut off fuel), Put in tester, crank engine over slowly.

Hope that helps

 

If there is a fitting on the end of the comp. tester, that lengthens it by 1.4 inches.. I suggest taking it off so it doesn't get stuck in there..

 

i like to pull the fuel pump fuse so fuel doesnt get in there... and how can you crank an engine slowly? It just cranks... anyway, crank it for about 3-5 seconds... If you get poor readings try putting a few drops of oil in the cylinder, if the readings are better than you know you need rings...

 

I dont even bother to pull the fuel pump fuse anymore. Ive done a lot of compression tests, and havnt seen a difference between pulling it and not pulling it.

Crank it SLOWLY??? WTF? Just turn the key for a few seconds.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doc_Honda &raquo;</TD></TR><TR><TD CLASS="quote">I dont even bother to pull the fuel pump fuse anymore. Ive done a lot of compression tests, and havnt seen a difference between pulling it and not pulling it.</TD></TR></TABLE>

What ?!? If you don't pull the fuse you will flood your engine. The difference will be all the fuel inside your engine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Outsane &raquo;</TD></TR><TR><TD CLASS="quote">If there is a fitting on the end of the comp. tester, that lengthens it by 1.4 inches.. I suggest taking it off so it doesn't get stuck in there..

</TD></TR></TABLE>

Usually with the one fitting if you don't have it your not gonna be able to do a compression test because it won't reach down there. Just tighten the piece on and use a little thread lock on it.

 

One I have never flooded my engine, while doin a compression test or any other way..

and
Two it reaches fine with out the fitting... ..it was just a suggestions..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Outsane &raquo;</TD></TR><TR><TD CLASS="quote">One I have never flooded my engine, while doin a compression test or any other way..

and
Two it reaches fine with out the fitting... ..it was just a suggestions..</TD></TR></TABLE>

Yeah I understand, some of them have an adapter you need to thread into the hole, which ends up coming off sometimes. And about flooding your engine, if you don't take the fuse out, or unhook the dizzy your gonna get fuel in your engine.

 

yeah I may get fuel..but not enough to flood any thing..

I used to pull the injector wiring harness..but that was years ago...since then don't do that any more...