Question about 2001 Ford Escape

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I'm getting a missfire code on cylinder 1, just cleaned the injectors and the plugs were changed not too long ago.

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Wires and BOOTS are Most liklry cause of Misfire in the Secondary side of Ingition System. Check those GOOD.

Posted on Jul 13, 2009

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Posted on Jan 02, 2017

dryden3
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SOURCE: missfire #1

Might be a sticking valve. If they stick, then they usually do it when the engine is cold. Hook up a vacuum gauge, then start the engine cold: if the needle bounces during the misfire, then suspect an intake valve is sticking.

Posted on May 05, 2009

MrBirdMan64
  • 183 Answers

SOURCE: 2.5 liter cougar has #1

Could be a bad ignition coil.

Posted on Mar 28, 2010

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2 Answers

What could this be?


CODE 301 IS #1 MISSFIRE 300 IS RANDOM MISS FIRE 201 IS INJECTOR FAULT . I WOULD START BY SWAPPING # 1 INJECTOR WITH SAY # 3 AND SEE IF THE MISSFIRE MOVES TO #3 IF SO REPLACE INJECTOR, IF NOT THERE COULD BE WIREING ISSUES

Oct 16, 2013 | 2006 Jeep Liberty

1 Answer

Code po202


If you had code 301 missfire for cylinder #1 and you changed #1 to #2 and the error codes moved to #2 then take about 3 seconds and say what did I do last. Then Change the #2 injector if it is still in the #2 hole.

Sep 03, 2013 | Jeep Cars & Trucks

1 Answer

Cyl 3 missfire . i changed coil n plug and checked injector , cleared coded but i still get the code poping back up


could have bad plug wire.fuel injector number 3 wires at connector could have short or open.PCM not firing fuel injector 3 could have intake manifold leak at cylinder 3 could mechanical failure at cylinder 3.

Aug 15, 2013 | 2004 Ford F150

1 Answer

P0300 and P0303 misfire codes 2004 Isuzu Rodeo 3.5L


so missfire detected and cylinder 3 missfire detected.
check to see injector pulse with "noide light" if ok injector is problem
remove fuel rail and injectors look into top of injector for blockage in screen filter in injector if blocked clean out or injector carby places can remove this screen replace it and test injectors and clean or just buy new injectors. make sure to clean out fuel rail and change fuel filter also.
if noide light flashes irratic or not at all wiring issue, check for power on one wire with ignition on 12v other is earthed by ecu when opened to inject fuel. other thing that can cause problem on cylinder is tappet clearance "shims" too tight, could do compression test to see if compression is low on cylinder or a cylinder leakage test to see if valves are leaking. broken valve spring. valves do not hit piston on these engines even if cam belt breaks, they are a "free wheeling" engine

Apr 19, 2013 | 2004 Isuzu Rodeo

2 Answers

Throwing P0301 and P0302 fault codes as of yesterday. Check engine light has been on and threw code of P1450 about 3-4 months ago. Figured it was an evap issue and no big deal thats why I never remedied...


those are misfire codes. Cylinder #1 & #2 in the firing order. Check for bad plugs first. Swap one of the misfires with a non misfire cylinder and see if that cylinder misfires. Or just change the 2 plugs. Put high temp anti seize on the threads if you ever want to remove them later.

Then change the 2 COPs (Coil on Plug).

Finally, check for plugged or bad injectors. CHevron Techron injector cleaner is the best. Add to 1/4 tank of gas for better cleaning.

Report results.

Please rate too. Thanks.

Dec 22, 2010 | 2001 Ford F150 Styleside SuperCrew

1 Answer

What does the code "misfire on bank 1 mean" on a diagnostic code for a 2000 lincoln navigator mean?


Do you mean "missfire on cylinder 1", code P0301? If so, that means that the computer has detected incomplete combustion in the #1 cylinder, which would be the front passenger side cylinder. There are many potential causes to a cylinder missfire ranging from worn / bad ignition components, clogged / bad fuel injector or even internal engine damage.

However the most common cause, especially on ford vehicles is a bad ignition coil. When trying to determine the cause of a missfire on an engine such as the one in your Navigator i start with removing the plug and checking for carbon tracing, excessive plug gap or contaminants on the plug. If that checks out ok i then swap the ignition coil from the missfiring cylinder to one that isn't. For example, I would swap the ignition coil from #1 to #2 and clear the codes. Then drive around until the light comes back. If it comes back with a missfire on cylinder #2 then you know the cause is the ignition coil and it has to be replaced. If it doesn't then it is something else causing the missfire which will require a bit more diagnostics.

How many miles are on your Navigator? Have the plugs ever been replaced? If you have close to 100k it would be a good idea to replace all of the plugs. Be careful when removing the plugs, it's not difficult to pull the threads right out of the head when removing the plug.

Jun 05, 2010 | 2000 Lincoln Navigator

1 Answer

1999 cadillac escalade missfiring cylinder #6


do you have a seperate coil for each spark plug check ur coil for number 6 or fuel injector

Feb 05, 2010 | 1999 Cadillac Escalade

1 Answer

1998 windstar 3.0 # 3 missfire code changed wires ,plugs, coil , injector, only code is missfire number three cat not plugged any ideas?


Head gasket could be blown allowing antifreeze to get into that cylinder and causing the plug to foul. Need to do a compression check and pay special attention to the cylinder at fault for low compression reading. If there is a head gasket bad, the two cylinders beside each other are usually low; also, you should see some drop in antifreeze if this is happening.

Jan 15, 2010 | Ford Windstar Cars & Trucks

1 Answer

I have a 2000 gmc sierra 5.3 with a number 6 cylinder missfire. things i have done so far: 1. compression test on number 6 tested fine,as well as the rest of the cylinders 2. leak down test. Held...


I would check the valves for number 6. If one or both are burned, stuck or out of adjustment it would cause your problem. If a cam lobe for that cylinder is burned or badly worn it could be the culprit.

Jan 10, 2010 | 2000 GMC New Sierra 1500

1 Answer

Cylinder 5 missfire 1999 tahoe


How is the pressure in the fuel rail? a low pressure will cause erratic firing of the injectors - the further down the rail u get usually the worse the problem. If the fuel filter was not changed regularly or if the vehicle stood for a while, dirty fuel/standing fuel at some time in the recent past, this **** will accumulate in tyhe injectors. To avoid spending a loada cash, swap a few injectors around and see if the problem moves with the injector.

Jan 07, 2009 | 2004 Chevrolet Tahoe

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