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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 5783
Experience:  GM Grand Master Technician 2007. 14 years experience.
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1998 k2500 6,.5 Starts fine oil pressure is fine. reaches

Customer Question

1998 k2500 6,.5 Starts fine oil pressure is fine. reaches running temperature oil pressure drops. step on accelerator oil pressure rises but not fully. let off accelerator oil pressure drops fast. a friend who knows diesels says that while idling motor sounds great. While driving oil pressure drops engine at times sounds like it is starving for fuel. stalls. Starts right back up. idles fine. changed oil pressure switch. 367000 miles
JA: How old is your oil pump? Has the check engine light come on?
Customer: original. no engine light does not come on
JA: What is the model of your '98 GM?
Customer: 1998 chevrolet k/v pickup 20/250 1gcgk29f2ww197146
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: oil change oil pressure switch
JA: Anything else you want the mechanic to know before I connect you?
Customer: doing the work myself
Submitted: 1 month ago.
Category: GM
Expert:  Ron replied 1 month ago.

Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

Expert:  Ron replied 1 month ago.

When you changed the oil pressure switch did you install a manual gauge and read the actual engine oil pressure?

Customer: replied 1 month ago.
Expert:  Ron replied 1 month ago.

That would be the next step, remove the new sender and install a Manuel gauge and monitor the actual oil pressure to see if its actually dropping out on you.