Question about 2002 Toyota Celica

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I just bought the car and it has no compression in all cylinders It has been stored for over a year

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You may have worn piston rings or warped cylinder bore. You should be able to the air coming out of your oil cap if that's the case. Or A sticking or improperly seated valves or you may just have a bad gasket.

Posted on Jun 28, 2009


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Why is there a cylinder 2 misfire?

Check these three things in the misfiring cylinder: spark, gas, and compression. One of them is wrong or missing. For spark check the spark plug and wire. Make sure you have spark on the plug wire, a strong blue spark. For gas, the fuel/air mixture may be wrong. Does the fuel injector pulse, putting gas into the cylinder? Possibly you may have a leaking injector or a clogged injector.

If gas and spark seem okay, you need to check compression in the cylinder. Low compression will cause a misfire. If compression is 20 or 25% lower than adjacent cylinders, that could be causing a misfire. For example, say numbers 1 and 3 cylinders had about 150 psi compression. 80% of 150 = 120, so if cylinder 2 is 120psi or less, that could be setting the misfire code. Low compression can be caused by valves not seating well, or bad piston rings, bad head gasket- something in the combustion area of the cylinder is losing compression.

Aug 17, 2015 | 2006 Mazda Tribute

2 Answers

2001 a4 FSI compression problem?

When the timing chain gets old, it will slip a tooth or two rather than break. When it slips, theengine msy or may not start, but the compression will be reduced. You usually have to remove the timing cover to verify the cain or belt has slipped, unless you have overhead cam. It that case, you only have to remove the valve cover to confirm valve timing.

Sep 11, 2017 | Cars & Trucks

1 Answer

Chevy troubleshooting

Spark, gas, and compression. And check timing. You've done the major work. Now you have to make sure you have done it right. By getting it running, you know. I'm pretty sure you can rent a fuel pressure tester and a cylinder compression tester at some national parts stores, Autozone or O'reillys, maybe others.
I don't understand your expression "...a little miss from bottom end" -an ignition miss, or a bottom skip or noise?

Start with checking ignition-a blue snapping spark-what you want to see at all cylinders. Then check that gas is getting into the cylinders. Fuel pressure and injector solenoid pulse. Then all you need after that is compression -good even compression in all cylinders-. Timing is right, spark timing is right, it should crank, er start.
Just one thing about compression, on a cold engine you're just looking for gross irregularities, you can't depend on the readings to be very accurate. A good compression test should be done on an engine at normal operating temperature. It gives a more accurate picture of your engine condition. As long as compression is over 100 psi per cylinder on a cold engine might be a general guideline, I suppose, but take that as only opinion, not fact..

Feb 19, 2014 | Chevrolet 1500 Cars & Trucks

1 Answer

Po305 code/replaced coil,wires,spark plugs and computer still misfires on that cylinder and gives me same code.

If the spark plug is firing, check that the injector is pulsing, is putting gas into the cylinder. If both are working, do an engine compression test. If that cylinder is low on compression, you have a mechanical problem-maybe a valve is not sealing, maybe a burnt valve; the cylinder head will have to be removed to find and fix the problem.
Pull the spark plug after it has been run and see if plug is wet with gas or smells like gas. That's one way to check for gas in the cylinder. Or put a "noid" light on the injector connector to see if the injector circuit for that cylinder is working. Noid lights can be bought at a parts store cheaply, just make sure it fits your connector.

Aug 02, 2013 | 2004 Kia Sedona

1 Answer

I have a 1994 ford mustang 3.8 v6, when i bought the car it had a slite misfire,i bought a new coil pack, changed the plugs and wires, I hooked up the coed reader and it pulled up P0302. cylinder number 2...

check your compression, you might have low compression in that cylinder-also check your fuel injector in that cylinder, it may be damaged (wiring/connection) or defective.

Jun 01, 2011 | 1994 Ford Mustang

1 Answer

I need to replace the ignition cinender

to replace the ignition cylinder you will need to remove the steering wheel,the horn contact,the compression plate, the hazard button,the blinker plate, and then you will see a small screw that holds the ingition switch in place. remove the screw and the switch will just come straight out. to install just reverse the removal steps. ( NOTE: to do this job safely you will need a steering wheel puller,, and a compression tool to remove the compression plate. -- these tools can be bought or rented at your local auto parts store ).


Feb 05, 2011 | 1994 Oldsmobile Cutlass Ciera

2 Answers


The fuel isnt being burned so it remained liquid & quietly collkected on the spark plugs. Clean & dry the plugs & try a few drops of oil in the cylinders to restore compression. It just may work. If that doesn`t do it then either the plugs are not producing enough spark to ignite the fuel, the cylinder compression is not sufficient for combustion, the spark timing is incorrect, or the air fuel ratio is way off. Your need to determine which is the case and why. You may want to start with a spark tester that will test for sufficient firing voltage ( cheap tester can be bought at any parts supply store for a few dollars). Then check cylinder compression. If the compression is low you should perform a cylinder leak down test to determine why the compression is low. Finally, if you have good spark, good compressoin, and the timing is ok then look for a really big vacuum leak caused by a stuck open EGR valve or a newly ruptured brake booster diaphram.

Jan 25, 2010 | 1997 BMW 318

1 Answer

Not firing right on no.4

First check plug and make sure the right plug for this vehicle,make sure that the heat rating for this plug is correct. Your problem could be a wrong heat rating plug been installed. Also make sure that the misfire is due to a bad plug and NOT a bad injector or injector wiring or uneven compression or even bad coil. Check injector wiring and make sure it not shorting or broken. To check injector pulse use a NOID light can be bought at almost any auto parts store like Auto-zone etc. Also compression can be checked with compression guage. A rule of thumb to go by is if any cylinder has more than 10 PSI in difference in compression there is a problem like a burnt valv etc. Here is a n example cyl# 1 170psi cyl#2 176 psi cyl#172psi cyl# 4 150 psi, there is a problem with cylinder # 4 and will cause a miss from cylinder #4. Good luck and thank for using FIX YA

Mar 26, 2009 | 2000 Mercury Grand Marquis

1 Answer

Poor gas mileage

if it is a fuel injected engine, try putting in a bottle of fuel injector cleaner to remove any sludge that may be in the injectors.Check the PCV valve too. it is located on the valve cover with a hose . It should blow air one way and not the other. if it blows both ways. it is damaged. it is supposed to be air tight one way.if that does not work, do a cylinder compression test. For that you need a compression guage which can be bought at any autoparts store.Check how much compression your engine needs to have if it is a V6 or V8 or 4 cylinder.You did not specify.If it is below normal for your particular engine, the rings may be wearing down or the rod bearings.

Nov 20, 2008 | 2001 Chevrolet S-10

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