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Old 09-10-2009, 06:21 PM
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COMPRESSION TEST

when doing a compression test how do i stop the fuel from spraying?
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Old 09-10-2009, 06:35 PM
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Re: COMPRESSION TEST

either pull the fuel pump fuse, or unhook the coil wire. i always do the latter.
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But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 09-11-2009, 06:02 PM
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Re: COMPRESSION TEST

do i need to take all 4 spark plugs out and check that way or take one out at a time?
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Old 09-11-2009, 06:13 PM
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Re: COMPRESSION TEST

one at a time
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2005 Stage2.5+ Subaru WRB STi : RzKar!
Ivey Tuned - Advan - Cobb - Rallispec - CP - Perrin - ACT - KillerB - Carillo - TurboXS - Defi - Innovate - Walbro - DeatschWerks - Feal - H&R - Alpine - Infiniti - Curt

2001 Kawasaki STX1100 D.I. - Sold!
2007 Sea-Doo RXT 215; ET 127 +3 S/C impeller, DIY 3" intake, DIY resonator delete/free flow exhaust, DIY oil catch can, Rule 500gph bilge pump


Quote:
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But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 09-11-2009, 06:23 PM
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Re: COMPRESSION TEST

thanks
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Old 09-11-2009, 07:52 PM
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Re: COMPRESSION TEST

the adapter from the compression gauge got stuck on the spark plug hole and i cant get it out,what should i do?
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Old 09-11-2009, 08:58 PM
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Re: COMPRESSION TEST

hahhaha i did that once too. you actually don't even need to use that adaptor, the threaded end thats already on the hose is actually the same threading and can be used.


to get it out, just keep tightening the hose onto it, then loosening it, and cross your fingers you loosened the adaptor, and not the hose.
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2005 Stage2.5+ Subaru WRB STi : RzKar!
Ivey Tuned - Advan - Cobb - Rallispec - CP - Perrin - ACT - KillerB - Carillo - TurboXS - Defi - Innovate - Walbro - DeatschWerks - Feal - H&R - Alpine - Infiniti - Curt

2001 Kawasaki STX1100 D.I. - Sold!
2007 Sea-Doo RXT 215; ET 127 +3 S/C impeller, DIY 3" intake, DIY resonator delete/free flow exhaust, DIY oil catch can, Rule 500gph bilge pump


Quote:
Originally Posted by Brash View Post
But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 09-12-2009, 03:59 AM
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Re: COMPRESSION TEST

i did that alot of times but i think i tightened the adapter even more, i bought long pliars im gona try to trim them so they're thin enough and try to untighten it this way. good thing its a weekend cuz this is my daily driver
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Old 09-15-2009, 03:20 PM
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Re: COMPRESSION TEST

you can put a LITTLE BIT of lock tite on the threads of the hose and then screw it back down into the adapter, let it sit long enough to set up a bit, and then unscrew and it should get the adapter out too...

The key words being LITTLE BIT.
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Old 09-16-2009, 08:03 PM
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Re: COMPRESSION TEST

got the adapter out and did the compression test,wet and dry.dry was 1.140 2.130 3.45 4.90 first second and fourth picked up compression after wet test but third one not so much from 45 to 60. should i try valve clearance test next? is 45psi to low?
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Old 09-16-2009, 08:16 PM
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Re: COMPRESSION TEST

not sure if that'll really tell you anything. but you need to do some sort of test that tells you where your loosing that compression (cough LEAKDOWN test)

45psi is wayyyyyyyyyyyyyyyyyyyyy too low. H22's should be roughly AROUND 180-200'ish psi.
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1995 Honda Prelude SE Turbo; 250whp, 275wtq @ 10psi Soldddd!!!

2000 Acura TL; DD
2005 Stage2.5+ Subaru WRB STi : RzKar!
Ivey Tuned - Advan - Cobb - Rallispec - CP - Perrin - ACT - KillerB - Carillo - TurboXS - Defi - Innovate - Walbro - DeatschWerks - Feal - H&R - Alpine - Infiniti - Curt

2001 Kawasaki STX1100 D.I. - Sold!
2007 Sea-Doo RXT 215; ET 127 +3 S/C impeller, DIY 3" intake, DIY resonator delete/free flow exhaust, DIY oil catch can, Rule 500gph bilge pump


Quote:
Originally Posted by Brash View Post
But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 09-16-2009, 08:23 PM
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Re: COMPRESSION TEST

it was 210 on 1st cylinder when i did wet test and close to that on 2nd one 4th one had 125 on wet.im gona have to take it to a shop for a leakdown test.could it be bad head gasket?
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Old 09-16-2009, 08:27 PM
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Re: COMPRESSION TEST

possibly. are you noticing any oil in your coolant/coolant in oil? those would be indicators of a bad HG.

but i have a feeling your piston rings are toast.

a leakdown test is gonna tell you whether your intake/exhaust valves, headgasket, or piston rings are done for, all at once. which is why its such a good test.
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1995 Honda Prelude SE Turbo; 250whp, 275wtq @ 10psi Soldddd!!!

2000 Acura TL; DD
2005 Stage2.5+ Subaru WRB STi : RzKar!
Ivey Tuned - Advan - Cobb - Rallispec - CP - Perrin - ACT - KillerB - Carillo - TurboXS - Defi - Innovate - Walbro - DeatschWerks - Feal - H&R - Alpine - Infiniti - Curt

2001 Kawasaki STX1100 D.I. - Sold!
2007 Sea-Doo RXT 215; ET 127 +3 S/C impeller, DIY 3" intake, DIY resonator delete/free flow exhaust, DIY oil catch can, Rule 500gph bilge pump


Quote:
Originally Posted by Brash View Post
But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 09-17-2009, 03:57 PM
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Re: COMPRESSION TEST

should i get a CEL with bad HG?havent seen any coolant in my oil or oil in coolant yet.if its my rings then shouldnt they be the same in all cylinders?i wish i didnt go to school this fall,this one guy is selling a rebuilt block for only 5 bills.pretty good deal.
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Old 09-17-2009, 04:04 PM
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Re: COMPRESSION TEST

nope no CEL's.

nah they wouldn't be the same in all the cylinders. since all 4 cylinders are separated from each other, something coulda happened in 1 (or 2, or 3) of the cylinders and not affect the others.
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1995 Honda Prelude SE Turbo; 250whp, 275wtq @ 10psi Soldddd!!!

2000 Acura TL; DD
2005 Stage2.5+ Subaru WRB STi : RzKar!
Ivey Tuned - Advan - Cobb - Rallispec - CP - Perrin - ACT - KillerB - Carillo - TurboXS - Defi - Innovate - Walbro - DeatschWerks - Feal - H&R - Alpine - Infiniti - Curt

2001 Kawasaki STX1100 D.I. - Sold!
2007 Sea-Doo RXT 215; ET 127 +3 S/C impeller, DIY 3" intake, DIY resonator delete/free flow exhaust, DIY oil catch can, Rule 500gph bilge pump


Quote:
Originally Posted by Brash View Post
But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 09-17-2009, 05:46 PM
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Re: COMPRESSION TEST

Could be bent valves... although you would probably be misfiring too if that was the case, and that would eventually cause a CEL...

Rings are my next guess... but yeah man, they should all be +/-10% of eachother... so if one is reading 210, all the rest should be within 21 psi of that, in other words roughly between 190-230...

you are loosing LOTS of compression in 3 and 4, I'm surprised it's even running without misfiring.
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Old 09-21-2009, 02:30 AM
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Re: COMPRESSION TEST

i did the valve clearance thing, picked up 20psi on each cylinder but still 3rd and 4th are 60 and 90.i i did my intake on .16 and exhaust .19.i was wondering if i make my 3rd and 4th cylinders like .08 intake and .10 exhaust to get more psi.Will that work?what are the signs of misfiring?
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Old 09-21-2009, 09:47 AM
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Re: COMPRESSION TEST

No, that will do you no good and is, furthermore, dangerous and a good way to ruin your engine.

You need to figure out where you are losing that compression. Do a leakdown test to find out where you are losing it. If you are losing it from the valves, it's time to take the head off and get a valve job. If you are losing it from the bottom end... it's time for new piston rings at the least =/.

Sorry man, but it sounds like your engine has a serious problem. 60 and 90 are still WAY too low.

If your engine was misfiring you would hear the engine making a rhythmic sound instead of the normal smooth tone of it (think: beating heart, lub dub lub dub.). Also, your check engine light will come on eventually if you have a misfire...
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Old 09-21-2009, 04:23 PM
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Re: COMPRESSION TEST

no time or money to do any of those things,cuz i start college in 2 weeks.i was just thinking of a way to get more psi so it doesnt run so rough and sell it.
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Old 09-21-2009, 04:26 PM
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Re: COMPRESSION TEST

Well you aren't going to get much for it if it is running like that... and there is no cheap easy way to fix the problem you are having. The repairs required are major, and you aren't going to get much for a car if it is running in the condition yours is in. I highly recommend spending the money to fix it so that you can actually get a decent amount of money for the car.
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Old 09-21-2009, 04:57 PM
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Re: COMPRESSION TEST

i know that but i have one year left of school and i don't know if my car will make it till i graduate.
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Old 09-21-2009, 05:11 PM
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Re: COMPRESSION TEST

Quote:
Originally Posted by Andrei View Post
i know that but i have one year left of school and i don't know if my car will make it till i graduate.
sorry man. I don't know what to tell you.

Maybe perform a leakdown test (or bring it to someone that can do it if you can't) just to see exactly where the problem is, and then go from there. If the valves are the source of your leaks you can probably get it fixed FAIRLY cheap if you take the head off yourself and find a good shop to do a valve job for you. If it's the piston rings though, I'm not gonna lie, it's gonna be expensive if you can't do the work yourself. If it's the head gasket it'll be pretty pricey too...

Just keep your fingers crossed and hope it's the valves

Good luck man.
Anyone else have better advice for him? Please feel free to help him out.
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Old 09-21-2009, 05:19 PM
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Re: COMPRESSION TEST

yeah thanks, ill figure something out
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Old 09-21-2009, 05:40 PM
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Re: COMPRESSION TEST

if the valves were bent it will throw misfire codes. My exhaust recentlyvalves got bent causing no compression on 2 cylinders and low on the other 2 And it had misfire codes.

if its the HG the car should overheat and you will see prolly coolant mixed with the oil. it will look creamy and tan like starbucks coffee if it did.

but i agree its not going to be cheap even if you can do it your self its still gonna be pricey.

i would consider a leak down test to help narrow it down if you dont have any CEL codes or other signs of the problem.
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