Open loop again, gotta be closed loop for accurate results. Those are all freeze frame data, it tells where everything was when the DTC was set. We need to have real time closed loop data, mainly fuel trims, at 2K rpm.

 

Thank you Captain Hook. will try this again... Thanks again for all the help.

 

heres new results with closed loop.
MIL DTC P0304 Cylinder 4 Misfire Detected View Stored Codes P0304 Cylinder 4 Misfire Detected View Pending Codes P0304 Cylinder 4 Misfire Detected View P0335 Crankshaft Position Sensor Circuit Malfunction View Freeze Frame Information
Parameter Description
Results

DTC for which Freeze Frame was Stored
P0304

Fuel System 1 Status
Closed Loop

Fuel System 2 Status
Closed Loop

Calculated LOAD Value
23.92 %

Engine Coolant Temp
190.40 °F

Short Term Fuel Trim - Bank 1
-10.16 %

Long Term Fuel Trim - Bank 1
17.97 %


Parameter Description
Results

Short Term Fuel Trim - Bank 2
-1.56 %

Long Term Fuel Trim - Bank 2
10.94 %

Intake Manifold Absolute Pressure
20.13 inHg

Engine RPM
1,951.75 rpm

Vehicle Speed Sensor
29.83 mph

Air Flow Rate Mass Air Flow Sensor
5.08 lb/min

Absolute Throttle Position
26.67 %


Monitor Status
Monitor Name
Monitor
Icon
Status

MIL (Check Engine Light)

ON

Misfire Monitoring

Complete

Fuel System Monitoring

Complete

Comprehensive Component Monitoring

Complete

Catalyst Monitoring

Not complete

Heated Catalyst Monitoring

Not Supported

Evaporative System Monitoring

Not complete

NMHC Monitoring

Not Supported


Monitor Name
Monitor
Icon
Status

NOxAdsorber Monitoring

Not Supported

Secondary Air System Monitoring

Not complete

Oxygen Sensor Monitoring

Not complete

Oxygen Sensor Heater Monitoring

Not complete

EGR System Monitoring

Not complete

Boost Pressure System Monitoring

Not Supported

Exhaust Gas Sensor Monitoring

Not Supported

PM Filter Monitoring

Not Supported



Thanks so much...

 

Must be closed loop, real time data, not freeze frame.

 

not sure how to tell if its in open or closed loop. it always says freeze frame. ill delete the codes every time to make sure they are present codes. it says closed loop.? ill drive it for like 20 miles. i just cut off my cat because it was clogged. thought maybe had to do with whats wrong with this thing. could that maybe keep it from going to closed loop.
Did fuel pressure test pressure only dropped 3 pounds. But only had top pressure of 46 pounds. Not sure if this means anything. pressure held. Thank you

 

Aha, way back in post #3, I mentioned fuel pressure. Use this link and post all 4 numbers: https://blazerforum.com/forum/2nd-ge...eakdown-88305/