Misfire issue

[beardeddummy]

O2s have been changed 3 times since it began. all plug wires are good

 

[Supercharged111]

Damn. There's nothing left to even guess at. I think the only way forward is to datalog.

 

[beardeddummy]

Yea I've kinda adopted the hold it on the floor it'll quit eventually one way or another.

 

[Supercharged111]

Check all your grounds.

 

[beardeddummy]

Check all your grounds.

All the grounds I've found are good

 

[michael hurd]

All the grounds I've found are good

Look good, or 'measured low resistance'?

Same with plug wires.

 

[beardeddummy]

Grounds looked good and same with plug wires. I don't have a means of testing resistance but the plug wires were changed when I did the heads and had been changed before that so if it's in the ignition system its been through 3 tune ups (plugs wires and cap rotor).

 

[SAATR]

Grounds looked good and same with plug wires. I don't have a means of testing resistance but the plug wires were changed when I did the heads and had been changed before that so if it's in the ignition system its been through 3 tune ups (plugs wires and cap rotor).

Sounds like you need to invest in a meter. There's plenty of information out there on testing sensors to at least narrow down your possible culprits, and wiring issues are ONLY going to be found with a meter and some good schematics. You could have a nice meter for the price of one tune up, even nicer if you buy used. Unfortunately, good diagnostics is all that's going to fix this, not the parts cannon.

Sent from my XT1585 using Tapatalk

 

[beardeddummy]

Anyone think a crankshaft position sensor could be causing this?

 

[Supercharged111]

Did it miss before heads? Have you checked for a vacuum leak at the intake?