Question about 1999 GMC Jimmy

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Code p0303 misfiring of number 3 cylinder - 1999 GMC Jimmy

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HAVE YOU TRIED CHANGING YOUR SPARK PLUGS. WHEN PLUGS GO BAD THE BEGIN TO MISFIRE.

Posted on Oct 11, 2010

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2 Answers

Engine Misfire


Here's a link to your code problem,P0300 is their's a misfire and every number after 300,like 301 means cylinder one,which this is for both of your codes,go down the list and see if it's your problem.These codes have many faults,have to trouble shoot to fix. P0301 OBD II Trouble Code Here's the P0303 code. P0303 OBD II Trouble Code

Jun 22, 2015 | Saturn Cars & Trucks

1 Answer

What are codes 302 303 misfire that come up and how do i fix it


the codes are p0302 and p0303 p0302 if a misfire in cylinder number 2 p0303 is a misfire in cylinder number 3

Mar 30, 2012 | 1997 Honda Accord

2 Answers

CODE 003: 00772 P0303 Cylinder 4: misfire detected


Hi double check the code which came up, as P0303 is no.3 cylinder misfire.
Anyway this could be as simple as the spark plug . But is usually the coil.
I hope i have been of some help to you
John (South Wales uk )

Apr 24, 2011 | Volkswagen Passat Cars & Trucks

2 Answers

Kinda putters then engine light came on and its giving me a code p0303


p0303 is a mutible engine misfire on number 3 cylinder. the best fix,

A code P0303 may mean that one or more of the following has happened:

  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • but first of all check the wires and sparkplugs first!

Feb 18, 2011 | 2001 Jeep Grand Cherokee

2 Answers

CODES P0300 P0303


These codes are codes regarding failure. The code P0300 means repeated Engine Misfiring. The code P0303 means Repeated Misfiring of Cylinder Number 3. Kindly contact a technician to get both checked. Their Heads must have been misplaced or broken due to misfiring.
Thank you sir, Have a nice day.

Sep 26, 2009 | 2002 Dodge Neon

2 Answers

Obd codes p0300 p0301 p0303 p0305 p0401


P0401 Exhaust Gas Recirculation Insufficient Flow Detected

P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected


I would check out the EGR valve. That maybe what is causing all the misfires.

Mar 24, 2009 | 1997 Toyota Camry

1 Answer

2000 dakota 4.7 v-8 codes p0300 p0303 p0304 p0307


well the codes
p0300 multiple misfire
p0303 misfire cylinder 3
p0304 misfire cylinder 4
p0307 misfire cylinder 7

can be alot of things check cylinders for compression is what i would do first..

Jan 31, 2009 | 1997 Dodge Dakota

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