Maffic

Couldn't find it on the search so, here goes. How do you do a compression test on your own? Thanks.

LAN

iTrader: (1)

Quote:

Because of price and availability issues, most of us just use a standard piston engine tester.

If you hold the bleed valve open and watch the needle bounce, you can spot the pressure peaks in sets of three.

- sureshot

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HAILERS

You buy a compression gauge.

You remove the valve at the END (BOTTOM) of the hose. They sell a valve stem remover for about a buck to do that. My second jpg shows that valve that needs removal.

You DO NOT depress the valve shown in the first of the attached jpgs. If you do, you won't see more than about thirty psi. Ain't the right figure for compression.

You screw the end of the hose into the empty sparkplug hole. The FSM says the top or Trail plug hole.

You disconnect your CAS small white plug to prevent spark or fuel being injected in the rotor.

You get a long stick or broom handle to depress the throttle pedal all the way.

With a FULLY CHARGED BATTERY you spin the engine over while looking at the gauge.

The gauge will bounce from zero to around 100psi give or take a few depending on the condition of your car AND whether you have a series four Turbo car or a N/A car with a higher compression ratio.

While the gauge bounces up/down YOU have to determine how high the needle REALLY bounced. You can cover up the lower figures on the gauge with you finger or a piece of tape and just watch the needle bounce in the higher figures on the gauge. This will help, trust me. I'd suggest, to cover with tape or your finger the figures below 80psi and just watch for the needle above that tape line.

If you alone and can't be in two places at one time, try this for spinning the engine. Pull the Trail coil assy up. Look for a BLUE connector/plug. See how it has a jumper wire in it?? Pull that BLUE plug off the harness and set it aside. Now look at the harness side of that plug. Look for the BLACK/WHITE wire in the plug. Install a long piece of wire into the black/white wires socket.

With the car in neutral, touch the other end of the wire to the positive battery post. The starter WILL spiin over. So, now you can hold the pressure gauge in one hand and using the other hand touch the battery post and spin the engine over. No second person involved.

Maffic

Thanks