97 4.3, 78k miles dreaded P0300 code, via Innova 3150d
https://www.innova.com/Product/Detail/3150d
appreciate any help since I've done googles suggestions, without just throwing parts at it.
truck was running great, sat over weekend, Monday morning throws code, runs like crap.
Ok shouldn't be too bad, so:
New AC delco parts:
cap, rotor, plugs (.060 gap) and leads. 4 new O2 senors replaced about a few months ago when I did the cat (replaced with magnaflow direct fit)
Put old O2's back in, (they never set any codes, replaced as reg maintenance)
Distributor appeared to be ok, no real slop imo.
Vacuum, fuel psi, egr, tsp, map sensor check out. (when i pull connector set code)
hook up inductive timing light, check all plug wires when running, no miss fires from looking @ light.
pull a couple leads using old plugs watch spark, look good, blueish white, no miss fires.
What did i miss, besides 3 days of normal life haha?
What's next? or this the end (besides a match )
TIA
update:
well the p0300 code turned out to be p0301, not sure why it reported p0300 since it's just #1 miss fire. scanner specs says it can report p0300 thru 08, ordered the updated spider assembly and doing intake gaskets since i'm in this far.
saving match for later ......
https://www.innova.com/Product/Detail/3150d
appreciate any help since I've done googles suggestions, without just throwing parts at it.
truck was running great, sat over weekend, Monday morning throws code, runs like crap.
Ok shouldn't be too bad, so:
New AC delco parts:
cap, rotor, plugs (.060 gap) and leads. 4 new O2 senors replaced about a few months ago when I did the cat (replaced with magnaflow direct fit)
Put old O2's back in, (they never set any codes, replaced as reg maintenance)
Distributor appeared to be ok, no real slop imo.
Vacuum, fuel psi, egr, tsp, map sensor check out. (when i pull connector set code)
hook up inductive timing light, check all plug wires when running, no miss fires from looking @ light.
pull a couple leads using old plugs watch spark, look good, blueish white, no miss fires.
What did i miss, besides 3 days of normal life haha?
What's next? or this the end (besides a match )
You must be registered for see images attach
...TIA
update:
well the p0300 code turned out to be p0301, not sure why it reported p0300 since it's just #1 miss fire. scanner specs says it can report p0300 thru 08, ordered the updated spider assembly and doing intake gaskets since i'm in this far.
saving match for later ......
Last edited: