92 S-10 oil gauge reads low

[gtmarko]

Hello My 1992 S-10 Pick Up With A 2.8 V6 120,750 Miles - The Oil Gauge Drops When The Truck Is Warmed Up And Runs Rough Or Low Idle, I Do Have A Check Engine Light On For Code 33.the Oil Has Been Changed With A New Filter And Oil Level Is Ok. This All Happen After I Replaced The Thermostat,ANY IDEAS OF WHAT`S GOING ON WITH MY TRUCK PLEASE.

[BlazerLT]

Need to replace the MAP sensor.

How low does it read?

[gtmarko]

already replaced the map sensor. the truck warms up then the gauge drops to almost zero,then the idle picks up and then the gauge goes normal. could there be a vaccum problem?

[BlazerLT]

No, you need to do some maintanence and get your idle under control.

Your oil pressure is tied into your engine rpms.

[naturegirl]

could be oil pressure sensor. i have 1988 s-10 blazer that was doing same thing you describe

[naturegirl]

could be your oil pressure sensor. I have a 1988 s-10 blazer 4.3 that was doing the same thing. It was also showing code 33. This solved my prob.

[Mango™]

I have the opposite, mine reads on the 80, which is high.
It has always shown that for years. I have tried all different weights of oil.
1991 Chevy s-10, v6 4.3l
Any suggestion on that one?
THanks

[gtmarko]

ok i fixed it ,it was the oil sending unit runs like a top. no check and idles smooth and oil gauge normal. thanks naturelgirl andto all, you`re the best

[BlazerLT]

thanks for letting us know.

[balls_to_the_wall]

Hey blazerLT, when did you become a Mod?...J/W, cause i was thinking last time i was poking around and saw your posts, you were't a mod?.....just thinkin.

-Ryan

[BlazerLT]

About 2-3 weeks ago.

[balls_to_the_wall]

Cool deal, ive been poking around in the audio forum, since im upgrading my sound system, so i haven't been around here all that much

Congrats.

-Ryan

[naturegirl]

you're welcome. Glad to have helped.