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I have a code P300 multile misfire, intake /throttlebody taking in to much air.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1861 Answers

SOURCE: occasionally stall & engine check light on.code read p300 misfire

Sent is just now. Let me know if you get it. GLad to help, and Thanks for choosing FixYa!

Posted on Nov 20, 2008

scott586
  • 41 Answers

SOURCE: 1999 Pontiac Firebird multiple misfire

It could be a clogged fuel filter, bad gas. Or if you have done alot of modifications to it, the injectors may not be able to keep up.

Posted on Apr 21, 2009

  • 149 Answers

SOURCE: p300 code

dont go to firestone, those coils you changed might have been good, did you check for power to coil? did you ohm your injectors?

Posted on Mar 06, 2010

perkins48
  • 14195 Answers

SOURCE: engine misfire

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8037897f#hd1-1-16 Here's a link to your trouble codes.

Posted on Aug 27, 2012

dadodadman
  • 24 Answers

SOURCE: my 1998 chev suburban has a multiple cylinder misfire code p300 and175 to rich on bank#2 code. Ihave changed sparkplugs wires, and cap'n rotor. I've changed my electronic egr valve.have I miss

The cat coil, and engine module could be bad.

Posted on Mar 17, 2013

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1 Answer

My 2000 GMC Safari will misfire sometimes and when i stop at an intersection it will idle rough then runs ok What is the cause of this ?


p300, is a generic code for misfires. Could be any of the cylinders or all. When's the last time you had a tune up? Start with the cheap stuff, fuel filter, air filter, and clean the throttle body. If that doesn't clear it up, replace the plugs and wires.

Oct 12, 2014 | Cars & Trucks

1 Answer

Diagnostic code p300


means random misfire. (really means weak combustion x4)
ever change that slipped cam timing belt?
if the belt slips, compression likes to drop from 180psi to 80psi
as the retards to H3LL.
missfire can be caused by 50 things. but is just 4 in physices
1: bad 12vdc power to the EFI system (and spark)
2: low engine compression, Tbelt is top fail. on all 4 too.
3: bad spark (150k on spark plugs? and friends) tuneup time?
4: bad fueling (to much or too little fuel mix)
there are tests to do. ask'

a dirty maf can cause lean fuel ratios and 300s. easy
clean it from 12" far, or you will damage it. the part is $1000 as suz.
and rising./. or $300 for rebuilt so treat it like plastic gold.

more common causes, not guesses, based on 5years data.
a: low fuel pressure, 15 not 34 PSI. Gauge test is easy, ask.
b: all spark plugs end of life and the wire sets, or rotor/cap bad.
c: MAF is weak, reads too low air flow for reality, (dirty hot wire)
d: EGR stuck wide open, seems they all do at 50,000 miles.
e: leaking injectors ore clogged. but the misfire would show which cylinder. and 300s. (eg; 300s and say 302)
f: Main air intake leaks, even cracks in that huge tube. (old car)
lots of others, ill skip them.

the nifty fifty. (and counting)
http://www.fixkick.com/misfiring.html

Jan 21, 2014 | 1996 Geo Tracker 2 Door

2 Answers

I installed a timing belt on my 03 kia sedona. a piece of the cover broke off and caused the cam to jump 6 teeth. i reset the timing am now getting code p300 p303 and p305. guess it is time to replace the...


yeah, it is time to replace your cylinder, because the P300 meansRandom/Multiple Cylinder Misfire Detected, the P303 means Cylinder 3 Misfire Detected, the P305 means Cylinder 5 Misfire Detected.
__________________
auto diagnostic scanner JBT-CS538C

Oct 29, 2012 | Kia Sedona Cars & Trucks

2 Answers

What is a p0300 code


I found on line that the p300 coad is a random missfire in all cylinders and that the last number in a p300 code is the cylinder that is misfiring. Your p302 & p303 would be #2&3 cylinders.

Sep 18, 2012 | 1998 Dodge Caravan

1 Answer

In my '98 Century I am having serious hesitation while accelerating... Only happens sometimes, but frequency is increasing. When the problem occurs, I will drive for a bit, and when put in park, idle...


P0101 Mass Air Flow, P0300 random misfire, Your problem is the Mass air flow, the P300 is the result of the mass air flow range, Mass air flow is a hot wire sensor they fail when contaiminated, as for the P300 that the engine detecting the condition when the mass airflow range is out, but here is another problem 1998 Buick used a back up its called a map sensor its on the top of intake plenum, make sure its seated and wire connection are there, Now you are going to fix the problem yourself if you ever taken out ,a airfilter and replaced it, then all you need to do is purchase a MAF cleaner mass airflow cleaner or brake cleaner or electrical cleaner clean the inside of your mass airflow you dont have to replace it the code is range performance the hot wire cant clean itself, so someone has to do it

May 04, 2011 | 1998 Buick Century

1 Answer

At idle vech starts running rough and check engine light starts to flash if i try to drive vech runs very rough and won't pick up speed. checked code with scanner and found code p300 mulitiple random...


Check for vacuum leak.Check all vacuum hoses and especially around the intake manifold these motos are prone for intake gaskets leaking.This will cause a code P0300.HOPE THIS HELPS!!

Apr 19, 2011 | 2003 Chevrolet Silverado 2500HD

2 Answers

Loss of power


Some things to check since it has sat so long.
Bad gas Fuel filter dirty injectors dirty throttle body
The p300 code is a multiple cylinder misfire code. It sounds to me from what you described, that you are having some type of fuel pressure issues.

Dec 11, 2009 | 1999 Dodge Ram

2 Answers

What do these codes mean?


Code p300 - random misfire
code p301 - testing and results
code p303 - misfire cylinder 3
code p306 - misfire cylinder 6

i love code questions!!! i'm so good in this!

Jun 14, 2008 | 2001 Lexus IS 300

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