Question about 2005 Cadillac STS

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I have a randome misfire code and a misfire on number 7 sylinder.The engine runs ruf and respones as if there is to much fuil going to the engine. I have replased the spark plugs and the entire number one coil bank. I think I am loosing coolant as well but there is no exturnal evidence

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Probably camhead gasket went, it can give a misfire as well, so spark plug at cylinder 7 should be wet, there also has to be white smoke like steam coming from tail pipe even when engine is hot and water dripping

Posted on Apr 16, 2014

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Posted on Jan 02, 2017

  • 44 Answers

SOURCE: 2004 caddy deville customer changed

change coolant temp sensor. it will be reporting wrong leading to the misfire.

Posted on Aug 21, 2009

  • 27 Answers

SOURCE: engine stalls randomly engine code

Misfire means...spark plug is not working or you have a loose compression on cylinder. 2. Have the cylinder 2 test for compression and advice.

Posted on Oct 07, 2010

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I have a 2000 Dodge Stratus with a random misfire on 1,3 and 5. The engine runs fine besides a twitch in the motor that can be felt while idling. Already replaced plugs and wires. Suggestions?


get the OBD codes read this will tell you which switch/sensor is causing the issue , the last random misfire i encountered turned out to be low cylinder compression so if the OBD code says " random misfire " then get the cylinder compressions read , hope this helps

Apr 08, 2015 | 2000 Dodge Stratus

1 Answer

More detaisl on engine problem


sounds like coolant leaking into the cyllanders. when it runs for awhile the coolent "burns off" but when you make the engine work such as speeding up the back pressure forced more into the engine...bad head gasket or a cracked head or block ( water jacket)

Apr 16, 2014 | 2005 Cadillac STS

1 Answer

My 96 yukon runs ruf on take of but fine the rest of the time


Sounds like an ignition misfire. Is the check engine light on? If so, there will be a trouble code that can be read by a scan tool and will tell you which cylinder is missing. You may have a bad plug wire or plug. Could be a coil but not common failure for this vehicle.
Ignition misfires can be noticed while under acceleration (loading the engine).

Mar 15, 2014 | 1996 GMC Yukon

2 Answers

Mulitply cyclinder mis fire


Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.

A misfire diagnostic code P0300 indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a random misfire code doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

Symptoms may include the engine may be harder to start, the engine may stumble / stumble, and/or hesitate and other symptoms may also be present.

If you need this or additional details about DTC Fault Codes, feel free to contact us clicking the links.

Hope this helps and have a nice day.

Oct 26, 2011 | Mitsubishi Outlander Sport Cars & Trucks

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

1 Answer

Engine light comes on - Code shows P0300 and then


OBD II 300 Random/Multiple Cylinder Misfire Detected

When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Apr 04, 2009 | 1996 Dodge Ram 1500 Club Cab

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