explorer 2003 some misfire codes

[balston]

Hey Guys I have some troubles codes please letme know what is happening
P0300 Ramdon multiple Cylinder misfire detected
P0305 Cylinder 5 misfire detected
P0306 Cylinder 6 misfire detected
P0316 Engine misfire detected on startup (first 1000 revolutions).

 

[swshawaii]

4.0 V6? Recently serviced plugs or wires? Crossed wires?

http://www.explorerforum.com/forums/showpost.php?p=2496720&postcount=3

 

[balston]

Thanks but...

just park yesterday working fine. today when start the motor start the problem then I plug my scanner and those codes appears. I check the vacuum hoses everything looks good. the only thing is i'm gas empty. no much gasoline on the tank...I also remove the spark plugs an replace 1&2 by the 5&6 just to make sure 5&6 are bad or good. the problem still there. what do you recommend?

 

[balston]

explorer continue misfiring

Well guys today I install new spark, and sparkplug cables now added p0301 to the party. I also add sea foam to my gas tank and inspect al vacuum hoses everything good. Also perform the ignition coil resistance test all 3 circuits 13kohms aprox.... so guys tellme what next...

 

[zpn_by]

I'd be looking at the coil pack. Unless your injectors aren't working.... but with the pack, aren't 5&6 on the same pair?

 

[esclamada]

P0316 Engine misfire detected on startup (first 1000 revolutions).

I got this code before when my injector electrical connector was not seated properly. Make sure it's connected properly or the injector is working.



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[360cid]

Was that misfire code present before plug and plug wire changes or just after?

 

[balston]

re misfire

ok I already install new cable ,,new coil pack , new injector orings (clean and test each injector), install a new gas filter and clean the maf sensor, install new oring intake manifold. my spark plugs are about 4 month old, but looks fine. Also test the cylinders compression 180 to 190 psi,,also test with the noid light each injector signal everything looks ok. But my suv continues misfiring. I notice something wrong ..if acerlerate at maximun when driving the ingine light start to flash but goes off if I reduce the acceleration. Could be the gas pump issue? I don't have the instrument to check the pressure. Some times when I drive I can feel an intermittent hesitation. is like that the motor miss his spark current or something like this. also I notice that when in parking or neutral I accelerate to the maximun it is suppose that the computer limit the acceleration, but the motor is too weak or poor at that acceleration. honestly I don't have more ideas....so guys tell me something new.....

 

[balston]

re misifiring issue

well guys I continue having misfiring on cyl#2 . today I rescan my motor 4liitres 6 cyl heres the data for bank 1 and bank 2 oxygen sensors. any suggestion I will appreciate your help..Thanks in advance.

NOTE: sorry guys is the first time I attach an image so if fails please tell me how to do and I will try again..