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I have fitted new coil and plugs, checked fuel injector and checked compression.

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  • guyhddn91 Apr 06, 2011

    whats the problem you are having

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  • Expert
  • 120 Answers

Can you be more specific about what the problem is?

Posted on Apr 06, 2011

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Posted on Jan 02, 2017

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HellPoolHall
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SOURCE: missing on one cylinder

Replace the coil going to that cylinder, and then replace the valve cover gasket to prevent further oil from getting on the new coil. If it is not the coil, the crank sensor could have gone bad in it.

Posted on Aug 05, 2008

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2 Answers

I have a miss in 3rd cylinder.


suggest you check the distributor cap & especially the spark plug wire of the 3rd cylinder

Sep 22, 2015 | 1993 Nissan Sentra 4 Door

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

Car keeps missing on #3. New coilpack and plug? 97


you would need to check the fuel injector next to see if its delivering fuel to that cylinder. if injector is good the next step is check the wiring to the ignition coil making sure it doesn't have rodent damage. after that remove the spark plug to check its condition and finally do a compression test and compare compression of cyl3 to all other cylinders.

Sep 22, 2014 | Infiniti Cars & Trucks

1 Answer

HAD 2001 OLDS ALERO COMPUTOR CHECK SAID # 2 CYLINDER WAS MISSFIRING CHANGED #2COIL PACK STILL DIES WHEN SLOWING DOWN OR STOPING BUT STARTS RIGHT BACK UP DIES WHEN STOPPING OR SLOWING DOWN ALSO DIES AFTER...


Sounds like #2 is still missing. Misfires can be caused by an ignition problem, a fuel problem, or a mechanical problem where there is no compression in the cylinder.
Okay, you have changed the coil. Now try changing spark plugs and the spark plug wire-Swap #2 and #1 spark plugs and the plug wire too, and see if misfire follows now on #1. If it does, bad plug or bad plug wire. Of course you could just drop a new plug into #2 and see what happens. If no change, swap the plug wires and test again. If still misfiring, check the spark at end of plug wire-you need to see a blue snapping spark to know the ignition is working good on that #2.
If you have spark there, need to check if the injector is pulsing and spraying fuel into the cylinder. You might be able to feel the injector pulse if you hold a finger lightly on the injector while engine is running-should be a steady, rather rapid click feel to the injector. If not sure, have the injector circuit checked. You can buy an inexpensive "noid light" at auto parts stores, one that fits your injector circuit, plug it into #2 injector, and crank the car over or run the engine and watch the light-if working, the noid light will be blinking. This verifies the circuit is good. If the spark plug is wet with gas when pulled out, that would verify that injector is spraying fuel into the cylinder.
If still no help, have the compression checked in #2. Low compression from a valve problem or head gasket problem can cause misfires.
Good luck.

Sep 20, 2013 | 2001 Oldsmobile Alero

1 Answer

1993 deville 4.9 missing at idle and intermittant missing at speed. Has new wiring harness new plugs, new ignition coil etc


CHANGE FUEL FILTER AND CLEAN FUEL INJECTORS,CLOGGED FUEL INJECTORS WILL CAUSE ENGINE TO MISS, MAKE SURE SPARK PLUG GAP IS 0.060, LEAN MISFIRE FROM WEAK FUEL PUMP,CHECK FUEL PRESSURE SHOULD BE 40 - 50 PSI. IF EVEVY THING CHECK OUT OKAY,MISSING PROBLEM COULD BE LOW CYLINDER COMPRESSION OR INTAKE MANIFOLD AIR LEAKS.DO A COMPRESSION TEST IF NECESSARY.

Apr 08, 2011 | 1993 Cadillac DeVille

3 Answers

#1 plug is miss-firing.I have replaced plug and wire,but keeps miss-firing only on#1 plug.have been told that coolant is possibly getting in #1cylinder.also I have been told #1 coil could be bad.witch is...


Could only be a few things. The coil #1, Fuel injector #1, Stuck intake or exhaust valve, or blown head gasket allowing coolant into cylinder #1. Use a spark tester to check the spark coming out of cylindr #1 if checks good then ohm test the injector when it is warm. Check other injectors to compare. Do a compression test on cylinder #1 and test other cylinders to compare. If cylinder is low compression suspect valves and or head gasket. If compression is low then het a leak down tester to test if a valve is broke or sticking. On your sable i would suspect injector or coil most likely.

Oct 10, 2010 | 2000 Buick LeSabre

2 Answers

Have a misfire on cylinder 3


Hello
Here is what to check let me know if you need help checking this out
most common misfire causes on the cars I've worked on have been:
  1. Spark plugs
  2. Spark plug wires
  3. Ignition coil
  4. Fuel injector
  5. Wiring to fuel injector
  6. Timing Belt
  7. Vacuum leak or stuck open EGR
  8. Contaminated fuel or bad fuel pump
  9. Weak compression
  10. Blown head gasket

Jul 14, 2010 | 1998 Dodge Durango

2 Answers

Mazda Eunos 500 - Engine lacks power - investigation reveals strong sparks on all cyls fuel at all cyls compression to specification on all cyls timing ok. Removing spark plug lead on cylinder one makes no...


You said compression is good then i would say you may have a bad coil , unless one coil runs all cylinders, but could still be a coil,,next thing i would check would be the injector make sure it gets a pulse if it does then try switching injectors from that cylinder to another cylinder and see if the weak cylinder changes with the injector change, if it does then you have a bad injector,

Jun 14, 2010 | Cars & Trucks

2 Answers

Have a 88 rx7 floods out replaced coils plugs wires cap and rotor have also replaced fuel injectors. engine did start several times with intake removed but floods out with it installed


do you put your foot on the accelerator while cranking ???
rotors flood easily so dont be too worried if everything checks out
- voltage to coil packs are correct
- coil pack resistance is correct
- autochokes not jammed shut
- plugs are the correct type
- ht leads are measuring under 20k ohms
- what size fuel injectors are fitted...standard? a/market? impedence higher or lower than original? is cc rating higher tahn factory??

Aug 19, 2009 | 1988 Mazda RX-7

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