L33T35T 4Runner

I bought a 15 dollar compression tester at walmart tonight. It actually seems half way decent.

all 4 cylinders stopped right around 140-145 PSI.

cyl 1 - jumped up to 145 after about 3 compression strokes

cyl 2 - took about 6 or 7 compression strokes to get to 145

cyl 3 - took about 8 or 9

cyl 4 - same as 1, 3 strokes

so... whats this mean? leaking valves? leaking rings? the motor runs good. i can still smoke the tires, and shes gets up and goes faster than my 3.0l
yes, ive searched.

also, the manual that i have for a 22r-e is for a 95 4runner, but i would assume the specs would be the same?

Compression Ratio .................................. 9.3:1
Compression Pressure ............... 178 psi (12.5 kg/cm )
Minimum Compression Pressure ....... 142 psi (10.0 kg/cm )
Maximum Variation Between Cylinders .. 14 psi (1.0 kg/cm )

oh ya, i did forget to disable the EFI, if that changes anything

L33T35T 4Runner

no opinions?

Yoda

The way to do a compression test:

Engine warm
Remove all sparkplugs
Throttle held wide open (air has to get into cyl's to compress)
I generally count 6 cranks and then read gauge

If any are low, repeat with a little oil added to each cyl (to help seal rings), if good then, it is a ring prob. If still not good, it is a valve or head gasket problem

I don't think you have much of a problem (if any) with your readings.

rdharper

On a 22re, would it not make sense to disconnect the battery as well? It seems to me that assures no fuel injected into the cyclinder which might confuse the result, not to mention you will avoid the loose ignition wires from looking for something to short to, like your fingers...

I'm going to try it on my '85, just to make sure I can get good readings while the truck is working well. Comments are welcome.

rdharper

Uhhh... Harper? How are you going to crank the engine to do the compression test if you disconnect the battery?

L33T35T 4Runner

he may have been thinking about a leakdown test