So ive been fighting an intermittent misfire for ever...

Ommateal · 05-20-2019, 03:03 AM

Quote:

Originally Posted by jchammond

I have also heard a few members speak of throttle body issues causing similar issues...but unsure all details.
Confirm all connections to them are clean & even put a touch of dialectical lube on connection.

Way Back when the issue first started I cleaned Mafs, new spark plugs, and took off and cleaned the TBs real good. All that seems fine.

jchammond · 05-20-2019, 03:06 AM

Quote:

Originally Posted by Ommateal

Way Back when the issue first started I cleaned Mafs, new spark plugs, and took off and cleaned the TBs real good. All that seems fine.

How many miles on engine & did it sit through winter with tank of fuel?

Ommateal · 05-20-2019, 03:08 AM

Quote:

Originally Posted by jchammond

How many miles on engine & did it sit through winter with tank of fuel?

55,xxx miles

Uhh I store it each winter in a garage with less then a quarter of a tank.

This issue has been going on for almost 2 years or so... prob not just bad fuel

jchammond · 05-20-2019, 03:10 AM

Quote:

Originally Posted by Ommateal

55,xxx miles

Uhh I store it each winter in a garage with less then a quarter of a tank.

This issue has been going on for almost 2 years or so... prob not just bad fuel

Not good on 10% ethanol fuel,,,always a full tank & some ethanol shield to prevent corrosion around pump etc..

Ommateal · 05-20-2019, 03:15 AM

Quote:

Originally Posted by jchammond

Not good on 10% ethanol fuel,,,always a full tank & some ethanol shield to prevent corrosion around pump etc..

here is a pic of Nissans take on it

And here is a pic from my original post of all the codes I found with a 5000$ scanner lol.

jchammond · 05-20-2019, 03:22 AM

Quote:

Originally Posted by Ommateal

here is a pic of Nissans take on it

And here is a pic from my original post of all the codes I found with a 5000$ scanner lol.

I’d stay away from dealership & find shop familiar with the VQ....fuel pressure is low & definitely will cause a random cylinder misfire.
I don’t have specs in front of me...but should maintain 40psi....I’m pretty sure & in some cases more.
Your oil temp is fine...mine ran 220-230 a lot & wouldn’t pull timing & derate unless it got past 240-250

Ommateal · 05-20-2019, 03:29 AM

Quote:

Originally Posted by jchammond

I’d stay away from dealership & find shop familiar with the VQ....fuel pressure is low & definitely will cause a random cylinder misfire.
I don’t have specs in front of me...but should maintain 40psi....I’m pretty sure & in some cases more.
Your oil temp is fine...mine ran 220-230 a lot & wouldn’t pull timing & derate unless it got past 240-250

Yeah I wish I lived near some of the reputable Z shops lol. Guess Ill have to dig around a lot here in rural NE Ohio for someone knowledgeable in VQ to look at it.

Is there anything common that could just kill a new AF sensor? Bad luck obviously lol.

Wonder if there is any other issue thats the main culprit that kills upstream sensor?

Other then that I guess I could just attempt the CJ return or buy a Brand new basket... both are the same price baically, assuming my sensors are still good then fuel is the last thing i can think of...

And yea its not going back to nissan, i gave them their 1 shot at diagnosing it.

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