02silverpathy Posted September 4, 2006 Share Posted September 4, 2006 Conqoured so much with the Path and now the ugliest head reared yet! P0300 Random Multiple Missfire. I found on the net a post by none other than lewisnc100 himself....I have also recovered 1 time a Cam Pos Sensor code also (is it the Dizzy?) "Start by checking for an intake air leak, listen while the engine is idling for a leak. When was the last time the plugs were changed, replace them and see how they look if it's been a while and also check the ignition wires and distributor cap. Beyond that here's the list of possible causes: Improper Spark Plug Insufficient Compression Incorrect Fuel Pressure EGR Valve Injector circuit open or shorted Injectors Intake air leak Ignition secondary circuit is open or shorted Lack of fuel Magnetized flywheel (drive plate)" After having checked this phenomonon with my timing light I have discovered that all 6 cylinders at one point or another do have a miss (light skips flashing sometimes even 2 or 3 in a row)...the quesion is with no vac leaks and a solid EGR do you next blame the DIZZY? After all that is where I am checking the energy flow that is not happening? -study- I know that I am wearing you guys out but all input is appreciated! :bow: Link to comment Share on other sites More sharing options...
XPLORx4 Posted September 5, 2006 Share Posted September 5, 2006 Start with cap, rotor, plugs, and wires, if they're not relatively new. Then replace the distributor. Link to comment Share on other sites More sharing options...
02silverpathy Posted September 6, 2006 Author Share Posted September 6, 2006 (edited) Bought a Dizzy from Distributor King on eBay...$220 plus 6.95 ship. They are in NY so I will have it on Friday...Hooray! -alcohol- Now then party over, how do I put this in? Looks easy, but couldn't find anything in the XPLORx4 online answers FSM !! Edited September 6, 2006 by 98silverpathy Link to comment Share on other sites More sharing options...
vengeful Posted September 6, 2006 Share Posted September 6, 2006 My Hayne's manual got stolen my some illegal at the car-wash. Otherwise I'd check that for ya. Link to comment Share on other sites More sharing options...
94extreme Posted September 6, 2006 Share Posted September 6, 2006 so did you even do the plugs, rotor, cap, wires? pulling out the dizzy ain't hard but you have to pay very close attention. you have 3 things moving and you need to keep their relation the same to be on time. CPS is in the dizzy. Link to comment Share on other sites More sharing options...
02silverpathy Posted September 7, 2006 Author Share Posted September 7, 2006 Plugs, Wires, Cap and rotor all have less than 4 tanks of fuel on them---thats what....800 miles, lol! They should all still be top notch, after seeing the cam pos sensor code and seeing the miss on all 6 wires I am blaming the dizzy since it doesn't matter how much or how little fuel I tell my AFC to give the engine. I would say though that temp of engine is directly related after sitting idle even at say a long light it gets bad hunting for rpms and shimming, but fresh off the interstate she sits good for a while then starts shuddering as time passes sitting still...of course to make it tougher yet when the engine is in closed loop it runs perfect! what are the three things? Rotor/Dizzy Cams not moving? ??? Venge I have a haynes but hadden't expected answers there!? Link to comment Share on other sites More sharing options...
94extreme Posted September 7, 2006 Share Posted September 7, 2006 yeah, techincally those 2 but it kind of works out to these 3: rotor/dizzy case/engine head. first, mark the dizzy position on the head, when you pull up on the dizzy , the rotor will spin CC (?) so try to start at TDC and then mark the spot it turned to.. then set your replacement dizzy the same way and insert and then try to position it the same way as the other one was in relation to the head. if you're close it will run good. if you're off even one tooth you'll know.. if the adjustment to the head is not close to the original position then you're off some teeth. Link to comment Share on other sites More sharing options...
02silverpathy Posted September 9, 2006 Author Share Posted September 9, 2006 Swapped the Dizzy...truck idles much smoother, revvs smoother. P300 still in effect. I can't see it though...I used the timing light and this time I can't find the miss....I can hear it in the ignition, but I am just not seeing the missfire in the light...anyhoo--- I need to replace a part of the intake (closest to the TB 45 deg bend part) it does have a small tear, other than that what in the hell is left?? Improper Spark Plug--------------------Maybe? Insufficient Compression----------------Oh boy Incorrect Fuel Pressure-------------How do I figure that out? EGR Valve---------------------------------Nope Injector circuit open or shorted--------------Ok, how would I know that? Injectors-----------------------------------^^^same^^^ Intake air leak---------------Working on it Ignition secondary circuit is open or shorted----new wires and plugs cap and rotor Lack of fuel---------not hardly Magnetized flywheel (drive plate)-------so hows that happen and how do I know? Link to comment Share on other sites More sharing options...
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