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Misfires on cylinder number one with code,also code p1506.once it warms up vehicle runs fine

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P1506-- Idle Air Control

Damaged -- IAC Valve
IAC --Stuck Open
Vacuum Leaks
Failed EVAP System


May also have a bad ignition coil on cyl#1

Posted on Apr 06, 2011

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2006 ford five hundred - engine code P0301. When first starts, no issues, but then idle gets rough and car loses power. Miles from home with no tools but willing to do whatever.


P0301 cylinder # 1 misfire !
P030x - Cylinder x Misfire Detected Description: NOTE: x represents cylinder number 1 through 9.
The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. Possible Causes:
  • Ignition system
  • Fuel injectors
  • Running out of fuel
  • EVAP canister purge valve
  • Fuel pressure
  • Evaporative emission system
  • EGR system
  • Base engine
Diagnostic Aids: The malfunction indicator lamp (MIL) blinks once per second when a misfire severe enough to cause catalyst damage is detected. If the MIL is on steady state due to a misfire, this indicates the threshold for emissions was exceeded and caused the vehicle to fail an inspection and maintenance tailpipe test. Application Key On Engine Off Key On Engine Running Continuous Memory All - - GO to Pinpoint Test HD . Could be an ignition coil !An to replace it the intake manifold has to come off !

Aug 01, 2015 | Ford Cars & Trucks

1 Answer

2007 murano runs rough at cold start then runs fine


misfire can be from plugs and also from injectors. It it is fine when it warms up I would be looking at injector tip problems from the cold.

Jan 10, 2015 | 2007 Nissan Murano SL

1 Answer

1995 4.3 MISSING WHEN WARMED UP


Is the check engine light on? An OBD II code P0300 - Random/Multiple Cylinder Misfire Detected could indicate a bad crank position sensor causing a misfire. Another possibilty would be the coil or distributor cap. The 95 and 96 were notorious for burning distributor caps. My 96 used to burn one once a month which is why Chevrolet stopped using them and went to multiple coils. More information would be helpful in diagnosing the problem

Feb 17, 2013 | Chevrolet 1500 Cars & Trucks

1 Answer

Po300,301,302,161,306 code numbers,what are they.upon acceleration it is like gas is having problem being sent to engine


P300 is random multiple misfire,301 is cylinder 1 misfire. 302 is cylinder 2 misfire & 306 is cylinder 6 misfire. P161 is a bad heater circuit in oxygen sensor bank 2 sensor 2. It is behind catalytic convertor. I would replace downstream oxygen sensor & clear codes. Run vehicle it may be all that is wrong.

Apr 04, 2011 | 2001 Dodge Dakota

2 Answers

I have a 2001 dodge ram 1500 4wd and three codes came up P 300 p 301 and p 308 what are these ??? help please!!


The codes mean as follows
PO300 multiple cylinder misfires
PO301 #1 cylinder misfire
PO308 #8 cylinder misfire
Some of the more common causes for these codes popping at once are, if you went through a big
puddle and the engine and wires are wet or the distributor cap and/or wires are bad or the camshaft
sensor(located inside dist cap) is bad and sending false signals. Hope this helps.

Oct 29, 2010 | Dodge Pickup Cars & Trucks

1 Answer

My 1996 cavalier wont pass inspection as the analyzer cannont communicate with my vehicles computer, what does that mean, autozone computer wont work either . i have no idea what to do, mechanic said it...


Testing your OBD2

Before You Begin
Since all vehicles are not the same please refer to the manual supplied with the OBD2 code reader for vehicle specific instructions.
Is your vehicle compliant?
All cars and light trucks manufactured since late 1995 should be OBD2 compliant. Two factors will show if your vehicle is definitely OBD2 equipped:
  • There will be a note on a sticker or nameplate under the hood: "OBD2 compliant”
  • There will be an OBD2 connector as shown below
april08_img1.gif
Pin 2 - J1850 Bus
Pin 4 - Chassis Ground
Pin 5 - Signal Ground
Pin 6 - CAN High (J-2284)
Pin 7 - ISO 9141-2 K Line
Pin 10 - J1850 Bus
Pin 14 - CAN Low (J-2284)
Pin 15 - ISO 9141-2 L Line
Pin 16 - Battery Power
Where is the connector located?
The connector must be located within three feet of the driver and must not require any tools to be revealed. Look under the dash and behind ashtrays.
Important info about OBD2
  • Can diagnose/check engine problems in all CAN and OBD2 vehicles (1996 and newer) and many of the most popular OBD1 (1981 to 1995) vehicles
  • Features unique patented all-in-one screen display and LED display for quick emissions check
  • Automatic refresh updates data every 30 seconds when connected to the vehicle - an easy way to verify repair completion
  • Code definition can be displayed in English, French and Spanish
  • Can be Flash updated with a standard Windows® PC
  • Features memory/battery backup for off-car review and analysis
Connecting
Connecting the OBD2 Code Reader is as simple as locating the DLC connector. The DLC connector is usually found under the driver side (left side) of the dash. The cable attaches only one.
Reading the LCD Display
april08_img2-small.gifClick to enlarge
Before you start testing, take a good look at the LCD display. The illustration above explains what the various icons mean and how the DTC (Diagnostic Trouble Code) will be displayed. The unit is self-powered by three-AAA batteries and will let you know when they are running low. When connected/receiving power from the vehicle, the CAR Icon will display.
The OB2 code reader is a very simple tool to use. Once it is connected, turn the power on. Once the ignition is switched to the on position, the code reader is checking the system for any stored DTCs.
The meaning of each DTC can be found in the manual supplied with your code reader.

Example: the code reader displays a DTC PO309, Cylinder 9 misfire was detected.
P0298 Engine Oil Over Temperature 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 P0309 Cylinder 9 Misfire Detected P0310 Cylinder 10 Misfire Detected P0311 Cylinder 11 Misfire Detected
Once you know what the problem is, you have to determine what's causing it. In this case the intake manifold gasket was faulty. Once the repairs have been made, it is time to clear the DTC and check the system to verify the repair.
Clearing the Diagnostic Trouble Code (DTC)
Clearing the DTC is very simple. Press the ERASE button on the code reader. A message will display on the screen; "SURE" for conformation. If you wish to clear the DTC press and hold down the ERASE button again until a message appears on the screen "DONE". If you did not wish to clear the codes and hit Erase by mistake at the screen message "SURE" simply press the link button to return without erasing any DTCs.
When you clear the DTC(s) from the PCM (Power train Control Module)you also clear ALL of the other gathered information that the PCM has collected, including Freeze Frame, Drive Cycle data, manufacture specific enhanced data end everything stored in memory is erased - just like if you cleared the Cache files on your PC.
The vehicle's PCM will need to re-learn the information that was erased. Don't be alarmed!! This is easily accomplished just by driving the vehicle. All you have to do is get driving.

Good luck and check the OBD 2 connection port.

Dec 02, 2009 | 1996 Chevrolet Cavalier

2 Answers

Stalling and hesitation, all 4 cylinders misfiring, once warmed car seems to run ok


More than likely , I hate to say, it is the coil packs. If the plugs were fouled it would not change to running fine after warm up. If you do change the coil packs, change the plugs while you are in there.

Jun 01, 2009 | 2001 Hyundai Accent

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