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98 maxima only starts when gas pedal to the floor and won't stay running after releasing gas pedal, runs smooth after 3000 rpm, changed MAFS and crank positioning sensor, new spark plugs and spark seems to be fine and also just did timing chains, p0300 code coming up for random misfire just don't know what's causing it

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  • Cars & Trucks Master
  • 5,680 Answers

Clean trottle body,Tune up,fuel filter,coils.

Posted on Apr 28, 2013

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Random Cylinder Misfire

Get a Haynes manual for your vehicle and use the troubleshooting guide there.  about $20 from amazon, auto parts store or haynes.com.  This WILL save you time and shortcut this and any future diagnosis. Haynes IMHO are top notch and I like them better than some factory service manuals that fgo for $100 and more.

David, 99 Saturn,  Cam position sensor codes seem to indicate a engine timing (not spark, but crankshaft/camshaft sync).  Old timing belts or worn tensioners can cause belts to jump a tooth or two which can have a pretty dramatic effect.  The belt could also be old/dryrot and have lost a tooth or two causing it to jump.  If any of these are the case, or if the timing belt interval is near,  replace timing belt, tensioner, idler roller if present and water pump.  FYI, quality OEM ignition wires shold last at least 10 years.  If they are really bad, you can open the engine compartment on a dark night and you will see sparks arcing between them and/or something metal nearby.  We all replace wires when we are not sure what the problem is, and regardless of what anyone tells you, it only rarely solves anything unless the car is more than 10 years old. 

good luck.

Posted on Oct 30, 2008

  • 184 Answers

SOURCE: Random engine misfiring- fault code P0300- 1999 cutlass

Could be coil pack(s), fuel injectors, etc. Rather than retype it, just check out this great article on P0300 random misfire - http://www.obd-codes.com/p0300

Posted on Dec 15, 2008

juggernautxt
  • 145 Answers

SOURCE: 2001 daewoo lanos check engine light

oil is non conductive so I doubt that's the problem, but the oil leak should be fixed to reduce problems down the road.
as for the misfire could be a couple things, fouled plug(s), a plug wire(s) that has cracks, or even valves that are not seating which i doubt from your explanation.
I would change your plugs and wires first, and fix oil leak. if this does not fix the issue there are other things going on.

Posted on Apr 30, 2009

Doug774
  • 1 Answer

SOURCE: Toyota Corolla 98 Cylinder #1 and #4 misfire

I have power at the coils , have good compression , have you ever seen a crank pickup cause this problem?

Posted on May 09, 2009

Mikey108
  • 475 Answers

SOURCE: 1998 jeep wrangler P0122

ck the map sensor

Posted on Sep 16, 2009

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