Question about 1998 Lincoln Navigator

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I have changed everything under the hood, maf sensor, coil packs, spark plgs, egr valve, h2o sensors, fuel filter and still have a miss. When I changed the fuel filter I found lots of sand in the filter, will this make it still have a miss in it?????

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As long as the sand was caught in the filter, and u replaced the filter..it shouldn't. it could be something as small as a collapsed or dry-rotted vaccuum hose, or as big as a bad head gasket. I would run down all of my vaccuum lines and check them first, and if they all are ok, i would take it in and have a compression test done.

Posted on Apr 26, 2010

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Posted on Jan 02, 2017

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2 Answers

Working on a 1997 buick century, 3.1. Car died, and left me stranded, did not restart.


Check compression. I have a feeling you have a broken cam shaft which is pretty common for these vehicles.

also you never mentioned if you actually checked for spark at the spark plugs. If the plugs are wet with fuel than the Crank sensors are working since the computer needs that signal to determine injector pulse and spark.

If there is no spark out of the coil pack or the wires at the plugs than there is a good chance the ignition module under the coils is bad.

good luck and keep me up to date with any findings or new info and ill do my best to guide you in the right direction.

Jan 23, 2016 | 1997 Buick Century Custom

1 Answer

What are codes p1401 p0302 p0305 p1409 p0301


P1401 Differential Press Feedback EGR Circuit High Input
Your EGR port is plugged. Replace your EGR valve, and clean the ports
A code P0302 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
  • Defective computer
  • A code P0305 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
    • Defective computer
    • A code P0301 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
      • Defective computer
      • A code P0302 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
        • Defective computer
        • p1409
        • EGR Vacuum System Leak - Read Our Article on EGR Valve Codes For Help With This Oldsmobile Check Engine Light Code

Sep 25, 2014 | Cars & Trucks

1 Answer

2.2 litre 1995 gmc sonoma idles rough no trouble code. found hole i brake booster vaccum line fixed that. replaced and changed fuel filter, idle air control valve, got spark at coil packs, put new spark...


Three things you should check using a good code checker which can read sensor outputs - the throttle position sensor (TPS), the mass air flow sensor (MAF) and the EGR valve. While you are at it, replace the PCV valve.

Jul 30, 2017 | 1993 GMC Sonoma Club

1 Answer

My 98 dodge spits and sputters i have changed the fuel filter, the map sensor, the spark plugs and the egr valve


It is possible that you could have a bad spark plug wire, or a bad coil pack. Also it could be your TPS Throttle positioning sensor. Check spark on each wire to verify that you are infact getting spark the whole way across. If you are then I would suggest changing the TPS as it is inexpensive, if that does not help it could be your MAF, ( Mass Aif Flow Sensor) Hope that helps

Aug 05, 2011 | 1998 Dodge Grand Caravan

1 Answer

My '01 impala 3.4 v-6 flat spots when COLD, at around 20mph. the idle is ruff with random misfires. acceleration is overall poor. when HOT, most symptoms go away leaving only some slight acceleration...


depending on mileage, but possible tune-up could fix it. if already done then check ignition coil pack and ignition wires also spark plugs, check vacuum hoses for leaks or porous, last injectors clogged - use some techron fuel injector cleaner (wal-mart has them). Also get the throttle body and iac valve cleaned by throttle cleaner . Also this other possibilities are to be checked and confirmed.:---- Engine running rough or misfiring can be cause by the following:

1.Defective spark plugs
2.Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4.False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

--------- This should help.Keep updated.Thanks.Helpmech.

Mar 27, 2011 | 2001 Chevrolet Impala

1 Answer

I changed the plugs, fuel filter, coil pack, and injector...now what?? its still missing and reading cylinder 5 missfire!!!


You either have another bad COP Coil and possibly
#5 wasn't bad either,or other issues

Check for vacuum leaks

If the O2 Sensors have 100,000 miles
change the front 2 only, with OEM,not a
cut and splice thing. NAPA can order them

Disconnect the vacuum hoses to the EGR Valve,
plug and drive a couple of days,to see if it is the issue.

Clean the MAF with CRC MAF Cleaner
Clean Throttle Plate with CRC Throttle Body Cleaner

Check fuel pressure at fitting on fuel rail with a gauge

What codes do you have?
Who is doing the work on your veh?

Jan 30, 2011 | 2001 Ford Expedition

3 Answers

Check engine light


A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

Jul 02, 2009 | 2004 Dodge Ram 1500

1 Answer

2001 volvo s60 2.4 turbo misfire


  • Faulty coil (pack)
  • Faulty camshaft position sensor
  • fuel filter and fuel
  • the p0300 car's computer has detected that one of the engine's cylinders is not firing p0301 In this case it's cylinder #1.p0302 In this case it's cylinder #2.and so on i would check the three listed above first then check
  • Faulty spark plugs or wires
  • Faulty oxygen sensor(s)
  • Faulty or plugged fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve
  • Defective computer Random misfires that jumps around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak that may be a broken hose or in the intake manifold (gasket,spary aruond it with wd40 or starer fluid if the engine idle goes high theres your problem) or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open. hope this helps
  • Apr 23, 2009 | 2001 Volvo S60

    1 Answer

    Honda Misses.


    Pin point the dead hole and check that injector.

    Dec 23, 2008 | 1995 Honda Accord

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