No oil pressure on start up.

[richs1]

I searched but didn’t find exact issue, but I could just suck at searching on here….

2012 Tahoe LTZ. Randomly on startup, zero oil pressure. Rev engine to 2000rpms and gauge jumps up to 40. Stays around 40 during the drive, idles about 26-30.

Any ideas what is causing it to register zero on startup? I have changed the sensor and screen, still having the issue.

I appreciate any help I can get.

 

[swathdiver]

I searched but didn’t find exact issue, but I could just suck at searching on here….

2012 Tahoe LTZ. Randomly on startup, zero oil pressure. Rev engine to 2000rpms and gauge jumps up to 40. Stays around 40 during the drive, idles about 26-30.

Any ideas what is causing it to register zero on startup? I have changed the sensor and screen, still having the issue.

I appreciate any help I can get.

Pump losing prime? Not sure. Let's start by asking what brand and weight oil are you using? What oil filter are you using? How long has this been going on?

 

[iamdub]

I'm with ^^^James.

Does it do it only after it has sat for a while, like over night?

 

[richs1]

It’s random, can be cold start or after driving and it’s been parked for 20 min. No clear cut “time”. Doesn’t do it every time.

Running mobile 1 5w30 with mobile 1 filter. That’s what I run in my other Tahoe(2011) and my C5.

 

[swathdiver]

It’s random, can be cold start or after driving and it’s been parked for 20 min. No clear cut “time”. Doesn’t do it every time.

Running mobile 1 5w30 with mobile 1 filter. That’s what I run in my other Tahoe(2011) and my C5.

And has it only just begun, dang, another song, since the last oil change? If so, I would put in a new oil filter.

 

[iamdub]

It’s random, can be cold start or after driving and it’s been parked for 20 min. No clear cut “time”. Doesn’t do it every time.

Running mobile 1 5w30 with mobile 1 filter. That’s what I run in my other Tahoe(2011) and my C5.

Dammit. You're not making this easy.

What happens if you don't rev it when it's at zero?

 

[iamdub]

And has it only just begun, dang, another song, since the last oil change? If so, I would put in a new oil filter.

Sounds like you're experiencing my world, just with a much older soundtrack.

 

[richs1]

And has it only just begun, dang, another song, since the last oil change? If so, I would put in a new oil filter.

No, it’s been doing it since I bought it a month ago, the previous owner is the one that told me about it, so it’s been going on for a while.

 

[swathdiver]

Sounds like you're experiencing my world, just with a much older soundtrack.

Saturday mornings growing up my dad would play these records in the morning.

 

[richs1]

Dammit. You're not making this easy.

What happens if you don't rev it when it's at zero?

I haven’t had the guts to just let it sit and see. I don’t know if it will come up on its own or not. I will add, there is. Zero engine noise, no ticks at all.

 

[iamdub]

I haven’t had the guts to just let it sit and see. I don’t know if it will come up on its own or not. I will add, there is. Zero engine noise, no ticks at all.

Have access to a scanner that shows live data? Just to rule out a wonky gauge.

 

[Fless]

And has it only just begun, dang, another song, since the last oil change? If so, I would put in a new oil filter.

Ha! You're quick with the songs this morning. I saw the Carpenters in the Quad Cities around 1974; that was a great concert. I had a crush on Karen....

 

[richs1]

Have access to a scanner that shows live data? Just to rule out a wonky gauge.

My brother does, but he is 60 miles away. Probably worth the trip. I’ll get him to check it.

 

[iamdub]

My brother does, but he is 60 miles away. Probably worth the trip. I’ll get him to check it.

And this will be the one time that it never acts up.

 

[swathdiver]

My brother does, but he is 60 miles away. Probably worth the trip. I’ll get him to check it.

Or get one from Amazon and they'll deliver it later today or tomorrow! Does Walmart carry them? I dunno.

 

[richs1]

And this will be the one time that it never acts up.

Exactly!

 

[richs1]

Or get one from Amazon and they'll deliver it later today or tomorrow! Does Walmart carry them? I dunno.

I have an OBDII, but it’s not pulling any codes at all.

 

[iamdub]

Or get one from Amazon and they'll deliver it later today or tomorrow! Does Walmart carry them? I dunno.

This. Especially with how cheap they are, they're always handy. It's been a while since I've researched, but, last I knew, it seemed that the ~20-$40 bluetooth dongles that synched with your phone were some of the best options as far as capabilities.

You could set it up, pull up the oil pressure display, hold your phone next to your gauge cluster and start the engine. If the gauge shows "0" but the PCM is reporting normal pressure, then you've found your problem.

*EDIT* I think the "Torque" app is what the cool kids are using these days.

 

[swathdiver]

I have an OBDII, but it’s not pulling any codes at all.

Like Chris says, I mean to use the reader to see the oil pressure. If your motor is not clacking, then maybe the gauge on the dash is the problem.

 

[swathdiver]

This. Especially with how cheap they are, they're always handy. It's been a while since I've researched, but, last I knew, it seemed that the ~20-$40 bluetooth dongles that synched with your phone were some of the best options as far as capabilities.

You could set it up, pull up the oil pressure display, hold your phone next to your gauge cluster and start the engine. If the gauge shows "0" but the PCM is reporting normal pressure, then you've found your problem.

*EDIT* I think the "Torque" app is what the cool kids are using these days.

I use Torque, my cool kids use something compatible with their apple phones! LOL