1997 Subaru Impreza Outback Sport - Has a misfire in #3 cylinder. What tests should I have my mechanic perform to diagnose the problem? He wants to do a compression test and an injector balance test.

yes. check the wire to the tag light, also any wire you can see in the chassis. your problem is most likely to be outside. best luck to you

Knowledgeable mechanic should do it 15 minutes.

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On most cars the clutch master cylinder is generally mounted to the firewall next to the brake master cylinder, HOWEVER quite a number of manual transmissions have cable operated clutches, and if I remember correctly Subaru was one of them.

See if you have lock out coverage on your auto insurance, and call an automobile locksmith.

check you ecu. same problem happen to me in an izuzu rodeo. I let my fuel get to low and it sucked dirt into the filter and messed with that and it set off a code for the ecu and messed it up but if i had just replaced the ecu first i wouldnt have had to change the injectors or anything.

its sludged up on the bottom of your oil pan

check all grounds

Most Subarus have a coating on the bottom of the chassis called Cosmoline, which is an anti corrosion compound sprayed on at the factory to protect them during shipping. The only thing I can recommend is to have your brakes inspected for siezed caliper slide bolds, severe rotor deterioration, and sway bar end links that may be broken or are about to break. You should also have the exhaust looked at because that is usually the first to go and the biggest pain when trying to get it emissions tested. I hope this info helps...

for a subaru this can be a common problem and can cause the engine to stall or cut out my opinion is get a second opinion from a mechanic i will let you no cats can be very expensive depending on the type and cc of your vehicle

Many things can cause a misfire,but basic mechanical checks or tests can be made relatively inexpensively.Compression testing the cylinders with a compression gauge will verify the general condition of the engine's piston rings and valve sealing capabilities.A leakdown test is similar to a compression check except that a leak down test is directed more towards verifying specifically the valve's sealing capabilities.A valve can burn or a bad seal occur between valve and seat...causing a misfire.Valves and piston rings are mechanical in nature,but there are many other possible causes.Vacuum leak,ignition problems,fuel problems,sensor problem,etc etc.Good luck.