The other day i was having alot of problems with my car and i thought it was all done by the dizzy because i was throwing left and right for stupid ****. So i swapped dizzy's and when i turned the key it wouldnt crank. Throw my old one back on and it would sound like ice in a blender turned to slusshie. I had a friend look at it and he said to do a compression test. And today i finally had time to do it and these are my shitty numbers, is my motor blown?

1: 35psi
2: 33psi
3: 34psi
4: 15psi (aww ****)

When i get a day off of work and get a chance im going to pull the head, what should be the first thing im looking for?

Also i did a compression test a couple months back and i had 180s all across the board. So i know this cant be good one bit.

Motor: 94 JDM GSR

 

I'd make sure you are doing the compression test right.

The numbers are VERY low, but the 3 that are close values leads me to believe you are doing something wrong.

 

well if its turbo you probably fried all the piston rings, fried pistons, bent rods etc anything can happen when turboed

 

Yea its turboed. And i think im doing the compression test right.

I started with cylinder one and crank the motor over 3 times (3 full rotations) and these are the numbers it showed. Even if i went longer thats the highest the numbers would go. Ill try it later tonight when someone comes home and they could turn the car over for me.

I never really boosted the car cause i had a boost leak in one of my intercooler pippings so the max i did was about 5psi. One time it spiked though to 10psi and died. So im thinking that fucked it up. Ill try the compression test again later on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid &raquo;</TD></TR><TR><TD CLASS="quote">. One time it spiked though to 10psi and died. So im thinking that fucked it up. Ill try the compression test again later on.</TD></TR></TABLE>

Damn, that could be it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HXMan &raquo;</TD></TR><TR><TD CLASS="quote">I'd make sure you are doing the compression test right.

The numbers are VERY low, but the 3 that are close values leads me to believe you are doing something wrong.
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dude that sucks

 

Try cranking it over 5-6 times and see what the results are. Are you sure the compression tester was screwed in all the way? If so and the motor is toast, run a leak down test. Prolly blew out the ringlands or something else. Was the motor smoking a lot? Were you getting a lot of blow by?

 

mAKE SURE YOUR injectors are unplugged,

make sure you are holding down the gas pedal as you are cranking,

Your car would not be running if your C#'s were really that low

 

Ok this motor is damn weird. When i got those numbers the motor sounded like it didnt want to turn over, it just sounded like the dizzy was spinning but the motor was cranking. Now when i went out to crank it i just held it there for a good while and the motor started to want to crank (but i disconnected the dizzy connectors) and i got a reading of 160 (should have kept it going i bet i would have hit 180) then when i went to do the 2nd cylinder it went back to **** mode and didnt give me any readings.

Any ideas what could be going on with the motor? Im ******* clueless and i wont have a weekend free to trouble shoot until next month so help me out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by YOUR MAMA &raquo;</TD></TR><TR><TD CLASS="quote">mAKE SURE YOUR injectors are unplugged,

make sure you are holding down the gas pedal as you are cranking,

Your car would not be running if your C#'s were really that low



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

Next time i go out ill do it this way, but should i connect the dizzy when i do it this way?

Also the motor never smoked and i dont know what a blow by is. But i never had any real problem with the motor until i swapped out the dizzy's. But now im back to the same dizzy i was using before i swapped it.

 

Dang your numbers are even lower then what mine was a few months ago.
Mine read 50 psi. It wouldn't even turn over. lol.
My vavles were bent.
I replaced with REV valves, dual valve springs, and retainers. My numbers are still low but it's at 150 and i can drive. Still need to rebuild my bottom end.
Oh the motor was turbo prior to the bent valves. And only had 40k total on it.

 

id check your battery/starter, make sure the motor is actually cranking and cranking good, if not that would explain low compression numbers

 

Is there any way to check the starter with a volt meter? Cause once it started to crank normally i was thinking it was the Starter. Also i think i might need to change my ICM but everytime i do a test that shows good but i get a code 15 (ignition) (thats very confusing).

 

BLOW BY IS when your ring landings go out, oil slips into your cynlinders and burns up. Is there smoke coming out your valve cover hose??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by YOUR MAMA &raquo;</TD></TR><TR><TD CLASS="quote"> Is there smoke coming out your valve cover hose??





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No smoke anywhere, other then normal exhaust fumes from the exhaust.

 

arent your #'s supposed to be in the 100+ range?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eL &raquo;</TD></TR><TR><TD CLASS="quote">arent your #'s supposed to be in the 100+ range?</TD></TR></TABLE>

Yea i had them in 180 when i did this a couple months ago and when the car wanted to work a couple hours ago i got cylinder 1 to 160 so it might be something else then the motor.

 

Maybe instead of doing a compression test, just do a leak down which will check more than the compression. I dont really want to explain how to do it, but I am sure there is a write up on it sopmewhere on here.

 

When doing a compressin test:

Make sure the engine is warm; When thing heat up, they expand creating a better seal.

Make sure to unplug the injectors; Don't need fuel being sprayed in there.

Make sure to unplug the distributor as well.

Make sure to hold the throttle wide open; Air can't be pulled in and compressed if your not allowing it to get in the first place.

If your numbers are low, add ~1 teaspoon of oil and re-check; If the numbers went up, your rings could be shot.

But the way your numbers vary between tests.....could your compression tester have taken a dive?

And as CivicGSR225 mentioned, a leak down test would also help out here.

 

The compression testor is my neighbors and he only used the thing once then never used it again. But he did use it along *** time ago, so maybe it is busted (thats what i thought as well).

I cant get the engine to warm up becasue theres no way for the engine to even turn on (main problem thats why i thought it blew and doing the test). Next weekend (when i finally get free time) ill test everything and see how that goes. Im starting to lean towards my starter is fucked.

Is there anyway to test a Starter and its volts? Thanks again for all your help guys.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid &raquo;</TD></TR><TR><TD CLASS="quote">The other day i was having alot of problems with my car and i thought it was all done by the dizzy because i was throwing left and right for stupid ****. So i swapped dizzy's and when i turned the key it wouldnt crank. Throw my old one back on and it would sound like ice in a blender turned to slusshie. I had a friend look at it and he said to do a compression test. And today i finally had time to do it and these are my shitty numbers, is my motor blown?

1: 35psi
2: 33psi
3: 34psi
4: 15psi (aww ****)

When i get a day off of work and get a chance im going to pull the head, what should be the first thing im looking for?

Also i did a compression test a couple months back and i had 180s all across the board. So i know this cant be good one bit.

Motor: 94 JDM GSR</TD></TR></TABLE>

ok plug everything in...open your fuse box in the engine bay and take out the fuse for the ecu...dont **** with anything and just crank it...you shouldnt beable to fry your ecu and it should crank.