Oil gauge is jumping around after coming to a stop. goes from 50psi down to about 40ish then the gauge can jump down to around 25-30psi.,RPM up, the gauge jumps up to around 50psi. no engine noise.

Asked by Feb 01, 2017 at 02:28 PM about the 2004 Chevrolet Blazer 4 Door LS 4WD

Question type: General

as stated above, the gauge will go from about 50psi at running speed down to
about 40ish and does at times pop down t about 20-30ish. the gauge is NOT
smooth in operation but jerky. no oil lose, no engine noises (ticking sounds).
started about a couple weeks ago. maybe oil pressure sending unit getting
ready to die?

6 Answers

109,655

It does sound like that, I would also flush the engine oil and use a cleaner, could be a small clog in oil pump as well...

73,795

I myself are not a fan of flushing an engine. Some cleaners are fast acting and dislodge chunks of build up and plug oil passages, causing more grief. The key is to keep up with the oil changes. I would just replace the oil pressure sending unit, it is possible the one on the engine has gone bad.

Oil is changed every 3000 miles religiously. I am going to change the sending unit this weekend. I talk with a few guys at work in the Bus maint, shop and they all said that the sending unit is famous for what I described. Will let ya guys know next week after I chenge it out. Thanks

73,795

Wise decision...

well, changed the sending unit last weekend and now it works great.

73,795

Good deal, glad its fixed...

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