How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan, Technician
Category: Chevy
Satisfied Customers: 23590
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Type Your Chevy Question Here...
Dan is online now
A new question is answered every 9 seconds

1998 k1500 Chevy 350. At a stop sign say my light came on

Customer Question

1998 k1500 Chevy 350. At a stop sign say my light came on and my oil pressure dropped to zero. Put it in neutral and it raised back up. Found that when the idle drops so does he oil pressure. Help??
Submitted: 10 months ago.
Category: Chevy
Expert:  Dan replied 10 months ago.

Hello, my name is***** you replaced the oil pressure switch? When pressure dropped to 0 did you hear any engine noise such as knocking or tapping? Thanks.

Customer: replied 10 months ago.
No noises. But it dropped again when I stopped s another light then picked right back up when I went
Expert:  Dan replied 10 months ago.

Usually if the pressure was actually that low you would hear engine noise. Have you tried to replace the oil pressure switch yet? Thanks

Customer: replied 10 months ago.
No sir
Customer: replied 10 months ago.
Why would the sensor fail in a way that follows the RPM curve I'm confused seems more likely or I should say logical that it would be oil pump lower RPMs they can build up the pressure until you crank up the RPMs I'm sorry for being difficult but if I change that oil sensor and it ruins the engine because it was really the oil pump I'm screwed
Expert:  Dan replied 10 months ago.

You can do a oil pressure test before replacing. You can barrow pressure tester from your local parts store for free. Engine should have at least 6 psi at 1000 rpm, 18 psi at 2000 rpm, and 24 psi at 4000 rpm. If good then replace the pressure switch, it is common to fail like this. Let me know how it goes or if you have more questions. Thanks.