Mystery solved

[1999hoe]

So i finally figured out my trucks p0300 code issue ..
Parts changed
coolant temp sensor
Gnition control module
fuel pressure regulator
cam position sensor
new spark plugs
new plug wires
new dist. cap
new rotor
new spider injector assembly
turns out after i changed cap rotor and wires it was still running like.shit maybe even a tad worse so i figured the injector assembly was the culprit and didnt mind changin it since it also.contained the new fuel pressure regulator so my mechanic blew the holes and gas spit out of cylinder 5 so.good call on changing.that after it was installed it fired quick no.backfirws or anything (previously backfired so hard and broke the starter housing on my brand new starter )but still couldnt figure out why the code was there and why its still misfiring well when.i replaced the cap i bought what i.was told was the.best cap rotor they had which was made by accel well after everythig else my mech says lets change the cap.again so this time i grabbed the ac delco version and presto chango misfire gone after all the aches and.pains it was the ******** cap which was the first thing i changed

 

[crazyikon86]

damn that sucks. dont u hate that lol

 

[xanatost]

Was yours not running or was it just missing??

 

[1999hoe]

AIt still ran but hard started and then backfired

 

[SunlitComet]

if you burn thru another cap look into the vents on the dizzy. or water dripping on the cap from a/c line.

 

[1999hoe]

Thx for the heads up

 

[saif najd]

Thak you for sharing such info

 

[1999hoe]

Anytime man hate to see it happen to someone else

 

[mranum]

As dumb as it may sound I have zero faith anymore with any aftermarket ignition products. So many times I have put on aftermarket parts, only to have to take them back off and put on OEM parts. Very frustrating.

Happy to hear you got it figured out though.

 

[inthechateau]

Glad you got it figured out. I've gone through 3 or 4 caps and rotors to get issues fixed before