Question about 1999 Buick Century

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I have a code telling me a misfire in the number 3 cylinder.

I have changed all the spark plugs and the wires but the message remains. I am told now that it is possibly an injector. Before buying an injector, I am going to test the compression in the cylinder to make sure I'm not just wasting my money. Always start at the cheapest fix first. Wires, \Plugs, Coil, and caps. Injectors are a hundred bucks a pop! let me know what you find out. I'm stumped at this point.

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I had a 94 buick lesabre and due to the the crank sensor i had a misfire

Posted on Jun 17, 2009

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1 Answer

Missing,viborating


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The vibrating tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

Jun 23, 2011 | 2009 Ford F-150

1 Answer

Vehicle missing,shaking,engine light comes on


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

Jun 23, 2011 | 2004 Ford F150

3 Answers

I have a 97 Ford Explorer AWD 8 cylinder. Check engine light comes on and I get code p303. Vehicle bucks at times, uses lots of gas. Believe it may be 02 censor, spark plugs and wires tested ok. Any Idea


code says #3 cylinder misfire, check the coil pack for this cylinder to see if its got spark, bad o2 sensor will spit another code, its most likely the coil

Mar 17, 2011 | 1997 Ford Explorer AWD

1 Answer

I own a 2002 mustang with v 6 eng.service eng light came on. pep boys retreived fault code that reads p0304.eng has new plugs and wires


P0304: Cylinder Misfire Detected (#4)

-Last number corresponds to which cylinder is misfiring.


Could be a faulty spark plug or wire. Try changing the spark plug from the 4 Cylinder to another and see what happens; If the different cylinder misfires, then it is the spark plug. If not, it could be the wires on cylinder 4.

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I have codes p1203-p1300 for 1998 acura rl


CODE P1203 CYLINDER NUMBER 3 MISFIRE CODE P1300 RANDOM MISFIRE DETECTED. POSSIBLE CAUSE BAD SPARK PLUGS OR FAULTY WIRES.CHANGE FUEL FILTER CLEAN FUEL INJECTORS. MORE THAN 1 CYLINDER MISFIRE COULD BE LEAN FUEL MISFIRE.

Dec 11, 2010 | 1998 Acura RL

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Have a check engine light on 2003 Kia Spectra GS. Told by mechanic that the codes state cylinder misfire in 2 cylinders and thinks it's a blown head gasket or cracked valve. Could it be that the wires or...


i think he is wrong ....check plugs wires and for vacuum leaks common for intake gaskets i have changed 3 this year and all had cyl misfire related codes

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Hi, I have a 1997 Porsche 993. Motronic 5.2 M07. I am getting these fault codes 1) 62 misfire emissions-relvant 2) 51 Cylinder 2 misfire emissions-relevant) 3) 54 Cylinder 5 misfire ...


misfire :-------- try checking your 02 sensors /fuel pump and filter.

for 51 cylinder misfire :---
Change the coil. Period. Very easy to remove from the vehicle if it's a 4 cyl. Follow that spark plug wire from the spark plug to the other end. What it's attached to you should replace
for 54 cylinder 5 misfire :---First you have to eliminate the most obvious problems, like spark plug and spark plug wire. If you replace those and you still have a misfire, then it's a good idea to look for a vacuum leak in the intake manifold

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Error code p0303 cylinder 3 misfire


po303 is misfire on number 3 cylinder. It could be a bad spark plug or wire, maybe a loose plug wire, could be alot of things. injector problem drop of water in fuel that happened to hit that cylinder. but most likely a plug misfired. I would clear the code and see if it happens again. If so give care a tune up.

Aug 09, 2008 | 1999 Ford Taurus

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