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1 an 4 injector register misfire replaced plugs , wires , cap ,rotor still missfireing

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  • Cars & Trucks Master
  • 22,114 Answers

No idea what this vehicle is but does it have a cam sensor ??

Posted on Oct 18, 2013

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

dennymulford
  • 1055 Answers

SOURCE: 1999 chevy suburban misfire

could be one of several things
1) run a compression check, if it low on that cyl then you have a blown head gasket or burnt valve
2) could be the enjector

Posted on Feb 27, 2009

  • 106 Answers

SOURCE: Cylinder # 4 misfire 1998 GMC K1500 5.7

may have a bad valve or piston!!

Posted on Mar 29, 2009

  • 34 Answers

SOURCE: misfire on #6 and #8 cylinder 1996 Dodge Ram 1500

Check the spark plug wiring . There are several places where the wires cross each other. These wire cross points MUST be at right angles to each other. Or you will have a misfiring problem.

Posted on Jul 07, 2009

  • 1 Answer

SOURCE: 1997 chevy truck running rough

97 chevy 1500 4x4 replaces plugs wires cap rotor dist pick up and crank sensor truck run good when cold as soon it heats up and comes to stop it feels like it boggs down runs rough and stalls any idea what to do?

Posted on Nov 04, 2009

  • 67 Answers

SOURCE: 98 dodge ram 1500 5.9 multiple cyl misfire. cyl 1

did you check to verify that you have the wires in the correct order possible distributor pick up bad

Posted on Nov 12, 2009

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Misfire cyl 5 have replaced plugs, plugwires, cap and rotor with top of the line to cheap parts only only does this when it rains or snows?


check for a problem in the injector wiring for that cylinder
check for corrosion in the connections
replace that injector control
injectors cause more misfires than plugs and associated electric do

Jun 22, 2017 | 1997 Nissan Quest

1 Answer

My 1999 suburban is missfiring on cylinder one, changed new plug, cap & rotor, wires


You seem to have covered almost everything electrical. That leaves mechanical. Either valves sticking, frozen, or spring, cam broken. Fuel line or injector to that cylinder is the only other item I can think of. Let me know how it works for you.

Dec 06, 2011 | 1999 GMC Suburban

1 Answer

96 acura tl 2.5 rough idle after warm up with rpm swings ignition and fuel pressure good sparkplugs black and new codes; primary o2 heater circuit bad missfire cyl.5 random missfire


REPLACE DISTRIBUTOR CAP AND ROTOR REPLACE SPARK PLUGS AND WIRES IF NOT BEEN CHANGED IN LONG PERIOD OF TIME.CHECK IGNITION TIMING.CHANGE AIR FILTER CLEAN FUEL INJECTORS.IF ENGINE STILL MISFIRE IGNITION COIL IS WEAK OR YOU HAVE LOW CYLINDER COMPRESSION.

Jul 21, 2011 | 1996 Acura TL Series

3 Answers

I fixed my transmission and its still missfiring, what can it be


Tranmissions don't misfire - they are just a bunch of gears.
You're engine can be misfiring - replace the spark plugs, plug wires, and cap and rotor.

Mar 01, 2011 | 1998 Honda Accord

1 Answer

My 1996 chevy 1500 has a missfire i have


Well, First i would have replaced all of the spark plugs and the wires, Then moved to the cap or rotor second, but in that case, did you check the spark plugs and wires, when was the last time they were changed? Maybe they were changed already and that's why you when straight to the distro? Is there a computer code for a misfire, or it feels like a misfire when it's running?

May 09, 2010 | Chevrolet 1500 Cars & Trucks

3 Answers

My S-10 keeps giving a P0300 dtc. Can't figure out what is setting this code. Usually misfires at idle. Any suggestions?


if u change plug wires ,coils ,plugs and still having problems check the injecter with a pulse light the one that dont pulse the pcm is bad are broke wire if all of them are pulseing then change the injecter.had the same problem on a 2000 s10 2.2

Apr 27, 2010 | 2000 Chevrolet S-10

2 Answers

Misfires #2, replaced plug, wire but still


4 or 6 cyl. ? Check compression, prolly and injector issue. Is the plug wet or dry when you take it out?

Apr 17, 2010 | 2002 Chevrolet S-10

2 Answers

Blinking engine light,cylinder 6 misfiring,sputtering , changed w


i would deffently try the carburator cleaner trick then odds are its a vacum problem. also just asking before having replaced the fuel injector on that cyl. did you or the shop use a noide light to make sure it had injector pluse on that fuel injector wiring plug.

Mar 11, 2010 | 1998 Ford Windstar

4 Answers

Po300 random mulitple misfire detected p1399 misfire any cylinder


If only one of your cylinders was misfiring, you probably would be getting a more specific code than P1399.
Also check the distributor rotor along with the cap and coils and wires (as mrgreenz suggests); the EGR valve to make sure it doesn't leak; your fuel pressure which can cause random misfires if the pressure is too low; and injectors if they are really dirty. If you have really high mileage, I probably would first just change out the plug wires with a new set, then reset the DTC and see if the code comes back.
Hope this is helpful as well.

Nov 27, 2009 | 2000 Honda Accord

4 Answers

2001 2500hd 6.0l multiple cylinder misfire at higher rpms


If you have someone scan it with a scan tool that gives you data stream they can tell you exactly what cylinder is doing it. You might have a bad coil or wire.

May 16, 2009 | 2001 Chevrolet Silverado 1500

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