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Number one cylinder no compression and has oil on spark plug

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Posted on Jan 02, 2017

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SOURCE: cylinders #4 and #6 not firing even after changing

The coil on plug style ignition coils have been a very weak spot in the 2002 and later MPV. Moisture can get inside and short out the internal workings. Also make sure that you have the correct electrical connectors plugged into the correct ignition coil. It is possible to accidently swap the connectors for #4 and #6 ignition coils and the harness still looks like it is routed correctly.

Posted on May 19, 2011

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2009 Subaru forester xp 2.4 lt limited edition has oil on the one of spark plugs? Brought to AutoZone it says it's a number 3 misfire. How do I fix the oil leak?


maybe you can use a spark plug oil shield, otherwise you must redo that cylinder and compression rings a costly job

Jan 26, 2016 | Subaru Cars & Trucks

1 Answer

2005 Jeep Cherokee miss fire on fifth cylinder


Pull the spark plug to see if it is oil fouled, preventing firing. If it is, you may have a mechanical problem in cylinder 5- do a compression test to check for low compression in that cylinder.

If plug is clean or only showing black sooty deposits from unburned gas, the problem could be either in the secondary ignition (plug, plug wire, coil), or an injection problem. Try a known good spark plug and spark plug wire, also a known good coil, if plug and wire wasn't it. If checking for spark, you need to see a blue snapping spark when cranking engine to verify good ignition. A weak or orange spark, or intermittent spark is an ignition problem.
To check injection circuit on number 5, you can purchase an inexpensive "noid light" at parts stores. It plugs into the injector connector, and if circuit is good the noid light will be blinking when cranking the engine over. It is rare for injectors to fail, but if circuit is good and no gas is getting into the cylinder, injector may be bad or plugged.
Good luck.

Oct 13, 2013 | Jeep Grand Cherokee Cars & Trucks

1 Answer

ONE FOULED SPARK PLUG


Either worn valve guides, valve guide oil seals on that particular cylinder, or worn piston rings. You need to perform a compression test to find out which one of these it is.

Compression check each cylinder with all plugs removed. Take notes on which cylinder has the weakest compression.

If no compression difference and if all operating within range, then change the valve guide oil seals on problematic cylinder.

If the cylinder shows a significant drop in compression, then drop no more than five or six drops of oil down the plug hole of the problematic cylinder, and perform the compression test again. The oil will temporarily seal any worn piston rings, so the pressure should rise when retesting if the rings are worn. If the pressure remains low, then your valves are not sealing properly and require attention.

Nov 13, 2012 | 1990 Toyota Camry

1 Answer

Dead cylinder....timming is right, getting fuel, spark is fine...compression test shows all cylinders are the same, good...the car only runs on 2 cylinders instead of 3...plugs and wires are new...


cant happen, you missed something, if you have spark, fuel and compression the cylinder will hit, go check again, when doing the compression test kill the spark and lock the throttle wide open. most common thing we see on the 1.0L 3cylinder is burnt valves most common cause is the wrong motor oil the valve lifters can not release the oil back threw the bleader hole if you use to heavey a motor oil, we see owners change the oil and use 10W-30 or 10W-40 and usely within 5000 miles the valves will burn, if you want to use the heaver oil then you need to replace the lifters with an updated part number that has the abilty to use the heaver oil.

Sep 26, 2011 | 1987 Chevrolet Sprint

1 Answer

2000 NEON NOT FIRING ON THE #1 CILENDER


#1 cylinder not firing, check spark plug, spark plug wire, remove spark plug and use a compression tester, and check the compression of that cylinder. should have at least 65 pounds of compression per cylinder. If the compression is low, you may try shooting a little oil in to that cylinder, replace spark plug, and try running motor again. if the compression is low on said cylinder, could be due to bad piston rings. requiring a motor rebuild.

Nov 08, 2010 | 2000 Dodge Neon

2 Answers

How do you check compression


A compression test will tell you if your engine has good compression. An engine is essentially a self-powered air pump, so it needs good compression to run efficiently, cleanly and to start easily.

As a rule, most engines should have 140 to 160 lbs. Of cranking compression with no more than 10% difference between any of the cylinders.

Low compression in one cylinder usually indicates a bad exhaust valve. Low compression in two adjacent cylinders typically means you have a bad head gasket. Low compression in all cylinders would tell you the rings and cylinders are worn and the engine needs to be overhauled.

HOW TO CHECK COMPRESSION
Compression can be checked two ways: manually with a compression gauge, or electronically with an engine analyzer the measures cranking compression. With electronic testing, a computer analyzer estimates compression in each of the engine's cylinders by measuring slight variations in engine cranking speed.

The results correlate well with actual gauge readings, and can be completed in a matter of minutes without having to remove any spark plugs. What's more, the analyzer prints out the results of the compression test making it easy to see and compare the actual numbers.

To check compression manually with a gauge, all the spark plugs must be removed. The ignition coil must then disabled or the high tension lead grounded. If the engine has a distributorless ignition, the ignition coils must be disabled to prevent them from firing. The throttle must also be held open.

The engine is then cranked for a few seconds using a remote starter switch or a helper while a compression gauge is held in a spark plug hole.

The maximum compression reading is noted, then the process is repeated for each of the remaining cylinders.

The individual cylinder readings are then compared to see if the results are within specifications (always refer to a manual for the exact compression figures for your engine because they do vary from the ballpark figures quoted earlier).

IS IT THE RINGS OR THE VALVES?
If compression is low in one or more cylinders, you can isolate the problem to the valves or rings by squirting a little 30 weight motor oil into the cylinder through the spark plug hole and repeating the compression test. The oil temporarily seals the rings.

If the compression readings are higher the second time around, it means the rings and/or cylinder is worn. No change in the compression readings would tell you the cylinder has a bad valve.

Hope this help (remember comment and rated this).

Apr 20, 2010 | 1998 Ford Contour

2 Answers

Oil on spark plug


The most common cause for oily spark plugs are worn rings in that cylinder or valve guides. Have compression check done on your cylinders to verify if the #6 cylinder has low compression. If compression is low only recourse is to have the engine overhauled.

Jan 27, 2010 | 2003 Pontiac Grand Prix

2 Answers

Smoke from exhaust; bad cylinder rough running


sounds like a head gasket or warped head. go buy a compression teseter. pull the spark plug wires off. remove spark plugs insert teset. turn engine over 3 times for each cylinder. should be within 10-15 of each other. check dipstick look to see if oil is milky.

Oct 05, 2009 | 1998 Oldsmobile Intrigue

4 Answers

Whats the correct way 2 perform a compression test on a chevy v8 small block


FIRST OF ALL YOU NEED TO RUN ENGINE FEW MINUTES DONT GET IT TOO HOT. TURN OFF ENGINE. THEN PUT ON SAFETY GLASSES. USE COMPRESS AIR BLOW DEBRI AWAY FROM SPARKS PLUGS.TO KEEP FROM GETTING INTO CYLINDERS.DISABLE YOUR SPARK IGNITION.AND DISABLE FUEL PUMP.BY REMOVING FUSE.NUMBER AND TAG SPARK PLUG WIRES.REMOVE ALL PLUG WIRES AND SPARK PLUGS.BESURE YOU NUMBER THEM AND TAG THEM SO THEY GO BACK IN THE ORIGINAL PLACE.THEN GET COMPRESSION GAUGE TESTER SCREW IT IN SPARK PLUG HOLE TO CYLINDER 1 FIRST.TAKE YOUR FOOT PRESS ACCELERATOR PEDAL TO FLOOR.PUT KEY IN IGNITION SWITCH CRANK ENGINE AROUND A FIVE TURNS.THEN CHECK COMPRESSION ON GAUGE.IT SHOULD BE NO LOWER THAN 100 PSI.IF SO SQUIRT SOME OIL IN THAT CYLINDER. IF COMPRESSION INCREASES.THAT CYLINDER HAS BAD RINGS IF OIL SQUIRT DONT INCREASE COMPRESSION. VALVES IS LEAKING. YOU DO ALL CYLINDER THE SAME.SCREW COMPRESSION IN PLUG HOLES.TURN ENGINE OVER 5 ROUNDS. WRITE DOWN ALL READINGS.

Sep 13, 2009 | 1985 Chevrolet Suburban

1 Answer

Engine of f22b 2.2 twin cam honda prelude


pull the spark plug wires out of the number one and number 4 cylinders, then pull the spark plugs out aswell and connect them to the wires they go to. then hold them two the engine block and see if you have a good strong spar/ark.......if not then ur distribortor crack is ur problem, if it does spark take all 4 spark plugs out of the engine and hook up a compression guage and check the compression, if good then check the fuel systesm, fuel pressure regulator/fuel injector/most likely not the fuel pump....if compression is bad then pour a tea spoon of oil in the cylinder that has low compression, do the compression test on that cylinder again, if the initial low reading goes up then its ur piston rings or ur cylinder wall, if it stays the same then its ur valve seals,valve guid,vlave seat carbon build up, check valve train may need a head job

Oct 16, 2008 | 1993 Honda Prelude

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