KurtRardin

iTrader: (11)

I've noticed that when my car warms up the oil pressure needle wont stay still at idle. Its reading under 40psi, which is normal, but it just has a slow jump to it like its fluctuating a few pounds up and down. The slightest bit of throttle stops it. I use Mobil1 5w30, and about a half quart of Lucas.

I was just wondering if this was the "sign" that the 97-98 oil pump was about to crash and burn. 75000 miles.

orangeapeel

iTrader: (18)

Well, an Ls6 might do you some good on a higher mile motor. You plan on doing a cam in the future? That is optimal time to change that thing out.

KurtRardin

iTrader: (11)

Oh yeah, i've been wanting to do a Torquer V2 for a long time, but i just cant scrape up $1000 for everything i need to do the swap.

indyboom

iTrader: (11)

Some cars just do that. i bet your ok. If it was gonna dump then it would of gotten worse. Im sure that mine does too. I dont stare at the fine line.. Its electronic and any impulse can make that happen/.. I think gmpartsdirect has those pumps CHEAP...

ashade98

iTrader: (16)

My needle seems to jump around a bit too, once it's warm (on a 98). I switched to a ported LS6 during my H/C swap. Still does it. It could be the sending unit. Don't worry about, if it bugs ya too much get a mechanical guage to make sure it's accurate!

Z28LS1camaroguy

iTrader: (3)

yeah its prolly the Oil Pressure Sending unit being a piece of plastic ****. mine does the same thing but changed over to a LS6 Oil pump and still does it but got better pressure than i use to have.

ROCNDAV

iTrader: (100)

1998's gauges were directly connected to the sensor (analog input), weren't they? I think in 1999 the signal then went to the ECU which then sends out a digital signal to the gauges. Maybe you're just seeing analog variations from the sensor either due to voltage fluctuations or just plain engine speed.

If none of this makes sense, I promise never to come back on this forum after having a couple of beers

KurtRardin

iTrader: (11)

Thanks for the info. I didnt feel like it was serious, but i thought i better be safe then sorry and just ask. The great thing about our cars is that there are so many of them that i doubt you can be the only guy with a certain problem.

gnomee

iTrader: (16)

I have a 98. I have noticed that the filter makes alot of difference in how the oil pressure works. At idle on a cold start with my a/c delco filter and 10w30 mobil I sit right at 40 no pulsing or anything. Once it gets warmed up ith sits between the 40 and 20 line on the left. With a fram and other crap it sits right on the 20 once its warm and never breaks 40 until I hit 2000rpm. No additives in mine either.