Q: Misfires and low oil pressure when stopping. 2002 GMC Savana 2500

asked by on

My van is having trouble with misfiring and it also has low oil pressure at stops. The engine idles badly and when I come to a red light and have to stop, the oil pressure drops. Another problem is that the exhaust smells rich. I have replaced the distributor, cap, wires, and it also has new plugs. Please give me your diagnosis and what I need to do to get my van in a good running condition. Thanks.

Hey there, thanks for writing in about your 2002 GMC Savana. If you are getting misfiring, then you should have a Check Engine Light on. The light should be scanned to get the codes to see what cylinders are misfiring. Remove the affected cylinders to inspect the plugs to see if they are fouled from oil or fuel. The oil pressure drop may be due to a fuel system over rich condition like a fuel pressure regulator leak in the intake which could be causing the rich engine, running rough issue, and oil getting diluted with fuel causing low oil pressure. To have this verified, consider having a qualified pro, such as one from YourMechanic, inspect the misfiring and oil pressure problem.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Misfires and low oil pressure when stopping. 2002 GMC Savana 2500

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car vibrating and shaking with the smell coming from the muffler

The awful smell your referring to is probably the catalytic converter being damaged. When there is a severe misfire, like what you're describing, the catalytic converter will deteriorate, resulting in a sulfur smell. Of course, the misfire will also illuminate...

Q: My car has high miles and tonight it began "missing" and the engine does not seem as "smooth" as usual.

Hello. The symptoms you describe can be caused by a wide variety of issues. If the Check Engine Light has come on, then I would recommend retrieving the trouble codes as the possibilities could be many. Issues with the fuel...

Q: Oil level drops during idling

Paying close attention to your gauges while driving is a great way to monitor your vehicle and ensure that it is running efficiently. I have actually come across this concern during other experiences with Chevy Express vans. When the van...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.