So I did a compression test and got:
#1 185
#2 200
#3 185
#4 185
But when I got to the last cylinder, smoke came out from the spark plug hole. Is this a serious issue? Maybe I didn’t screw on the tube tight enough?
Are you sure it was smoke and not a plume of the atomized gasoline and air mixture?? if so that is normal.
to perform an accurate test, you should actually have the fuel supply deactivated…and spark plugs removed from all cylinders prior
spark plugs were removed but the fuel supply wasn’t deactivated as I couldn’t find the fuse. my guess it would be fuel. if it was radiator fluid(my original fear) it would have come out the other hole rather than the hole I was testing at.
Just looked around from team-integra and saw this quote about the compression test:
Quoted from pressingonward
You don’t need to disable the fuel pump. Just unplug the distributor plugs at the distributor. The cam sensor is built into the distributor, so by unplugging it the computer won’t know when to inject fuel, so it won’t.
Plus there’s so little fuel injected during a compression test even if nothing’s disabled that it doesn’t matter.
If you don’t disconnect the distributor, it will try to spark and can burn out the coil because there’s no place for the voltage to go, so it keeps building and building.
Our cars don’t have a seperate fuel pump fuse or relay
//End quote
So I’m guessing this may rule out a severe inaccuracy of the fuel. I wonder if it was that last quote about voltage building up that may have caused the smoke? But either I think I’m going to conclude that it was just stuck air/fuel mix. I haven’t had any issues before and since the compression test. Thanks for the suggestions.
ive never disabled the fuel system, every procedure ive seen stated to disconnect the 2 prong connector at the disributor, remove the spark plugs and proceed with the testing.
After looking closer at some of the instructions I looked up, yup it does say to disconnect the distributor. Luckily, mine did not blow and I did replace the coil 1,000 miles ago. Lesson learned :uhoh:
I guess for our gen it isn’t so simple. That quote was in relation to our gen of car.
disconnecting the distributor disables the fuel system. no cyp signal
so the rings don’t get washed
after looking at the schematics, I can see that now. Good info!!!
I normally just unplugged the ECU fuse in the fuse box under the hood. Never had any issues that way.