Question about 1990 Oldsmobile Cutlass Ciera
I want to test the fuel pressure on this car. It is fuel injected throttle body. I was wondering if there is a test port somewhere or do I need to break a line. I am getting an intermittent code 44 (O2 sensor lean for 20 seconds) We already changed the fuel filter, fuel pressure regulator and fuel injector.
The internet is filled with all sorts of OBD1 Code 44 info to read
Bad Egr Valve --letting unmetered air in
Vacuum Leaks in the Exhaust Before the O2 Sensor
Bad Oxygen Sensor or corroded wiring
Vacuum leaks anywhere
Fuel Pressure too low
You'd have to tee into the fuel filter to use a fuel pressure gauge,
if you got no shrader valve on the motor
You changed a fuel pressure regulator-- in the throttle body?
You won't see much with a scope on that system, if you scope
the O2 Sensor,their sort of slow compared to OBD2
Posted on Mar 29, 2014
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Posted on Jan 02, 2017
Test procedure on that is a bit involved. You will need a volt/ohmeter and an injector harness test light. Instructions in haynes are pretty much from gm so they are a bit better than with some other cars.
Posted on Jul 30, 2009
SOURCE: it is a 1990 cutlass
If the car has high mileage, it is quite likely that the cam timing has changed due to a jumped timing chain or gear...depends on which engine it has?
Posted on Apr 15, 2011
Nissan240sxe could you please contact me. I have the same problem and am about at my wits end trying to figure out whats wrong assuming you figured out the solution. Email me at firstname.lastname@example.org Thanks.
Posted on Jul 04, 2011
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