Car is going into Engine Power Reduced as I am driving high speeds
Mods are Hahn I/c, Hahn charge pipes, car is tuned to 25psi has stage 3 clutch
stock air box
when at idle there is some shaking as if there were to be a misfire but it wont shut down, there has been a tremendous loss of power. has anybody had these kind of trouble.? or someone know what I can check out to solve it?

 

Check for codes?

 

no check engine light on

 

has laser iridium ngk plugs

 

Check for codes anyway; they sometimes show up before the CEL comes on.
Also, I recommend using stock plugs for the LNF.

 

Stock which are the ac delco?

 

Yep

 

Ok hopefully this helps

 

Trouble codes are
P0130
P0301
Po300
Po304
P2626
Po030
Po016

 

With that many codes I'd check all the fuses first

 

Yeah autozone guy said the same thing, have any idea of what fuses I can link to
?

 

Just open the fuse box under the hood and pull all the small fuses (one at a time). Won't take but a few minutes to do.

 

All fuses checked out good

 

I got nothing. Anyone?

 

Anyone that has a more less idea?

 

DTC P2237, P2243, P2251, or P2626

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
Review Strategy Based Diagnosis (See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Strategy Based Diagnosis) for an overview of the diagnostic approach.
Diagnostic Procedure Instructions (See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptors
DTC P2237

HO2S Pumping Current Control Circuit Sensor 1

DTC P2243

HO2S Reference Voltage Circuit Sensor 1

DTC P2251

HO2S Low Reference Circuit Sensor 1

DTC P2626

HO2S Pumping Current Trim Circuit Sensor 1

Diagnostic Fault Information



Circuit/System Description

The wide band heated oxygen sensor (HO2S) measures the amount of oxygen in the exhaust stream more quickly and accurately than the switching style HO2S. The wide band sensor consists of an oxygen sensing cell, an oxygen pumping cell, and a heater. The exhaust gas sample passes through a diffusion gap between the sensing cell and the pumping cell. The engine control module (ECM) supplies a signal voltage to the HO2S and uses this voltage as a reference to the amount of oxygen in the exhaust system. An electronic circuit within the ECM controls the pump current through the oxygen pumping cell in order to maintain a constant signal voltage. The ECM monitors the voltage variation on the signal circuit and attempts to keep the voltage constant by increasing or decreasing the amount of current flow or reversing the direction of the current flow to the pumping cell. By measuring the direction and amount of current required to maintain the signal voltage, the ECM can determine the concentration of oxygen in the exhaust. The signal voltage is displayed as a lambda value. A lambda value of 1 is equal to a stoichiometric air fuel ratio of 14.7:1. Under normal operating conditions, the lambda value will remain around 1. When the system is lean, the oxygen level will be high and the lambda value will be high, or more than 1. When the system is rich, the oxygen level is low and the lambda value will be low, or less than 1. The ECM uses this information to maintain the proper air/fuel ratio.

Conditions for Running the DTC

P2237

The ignition voltage is between 10.7-18.1 volts.
The engine is running.
HO2S 1 voltage is between 1.48-1.52 volts.
HO2S 1 heater is at operating temperature.
HO2S 1 closed loop is active.
The catalyst temperature is stable. AND
DTCs P0030, P0031, P0032, P0053, P0133, P0135 are not set.
The ignition voltage is between 10.7-18.1 volts.
The engine is running.
The Lambda parameter is 0.97-1.03.
HO2S 1 heater is at operating temperature.
HO2S 1 Closed Loop is active. AND
DTCs P0121, P0122, P0123, P0221, P0222, P0223, P0335, P0336, P0338 are not set.
The ignition voltage is between 10.7-18.1 volts.
The engine is running.
HO2S 1 heater is at operating temperature.
HO2S 1 Closed Loop is active.
Deceleration fuel cutoff (DFCO) has been active for 3 seconds.
DTC P2237 runs continuously when the above conditions are met for 2 seconds.

P2243

DTCs P0030, P0031, P0032 are not set.
The ignition voltage is between 10.7-18.1 volts.
The engine is running.
HO2S 1 heater is at operating temperature for at least 10 seconds.
DTC P2243 runs continuously when the above conditions are met for 2 seconds.

P2251

DTCs P0030, P0031, P0032 are not set.
The ignition voltage is between 10.7-18.1 volts.
The engine is running.
The HO2S 1 heater temperature has been within the normal range for more than 20 seconds.
HO2S 1 internal resistance is more than 950 ohms.
The following are true for more than 20 seconds.
The HO2S 1 heater is ready.
The engine is running.
The ignition voltage is more than 11 volts.
DTC P2251 runs continuously when the above conditions are met.

P2626

The ignition voltage is between 10.7-8.1 volts.
The engine is running.
Fuel cut-off is true.
The estimated exhaust temperature is less than 780°C (1,436°F).
The HO2S 1 heater is at operating temperature.
DTC P2626 runs continuously when the above conditions are met for 2 seconds, or when the above conditions are met for 10 minutes if the fuel level is low.

Conditions for Setting the DTC

P2237

The ECM detects that the pumping current circuit is open.
DTC P2237 sets within 1 second when the above condition is met continuously, or within 10 seconds when the above condition is met cumulatively.

P2243

The ECM detects that the HO2S 1 voltage is less than 0.2 volt or more than 4.7 volts.
DTC P2243 sets within 1 second when the above condition is met continuously, or within 10 seconds when the above condition is met cumulatively.

P2251

The ECM detects that the HO2S 1 reference ground circuit is open.
DTC P2251 sets within 1 second when the above condition is met continuously, or within 10 seconds when the above condition is met cumulatively.

P2626

The ECM detects that the HO2S 1 voltage is more than 4.81 volts.
DTC P2626 sets within 1 second when the above condition is met continuously, or within 10 seconds when the above condition is met cumulatively.

Action Taken When the DTC Sets

DTCs P2237, P2243, P2251, and P2626 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P2237, P2243, P2251, and P2626 are Type B DTCs.

Reference Information
Schematic Reference

Engine Controls Schematics (See: Diagrams\Electrical\Powertrain Management\System Diagram)
Connector End View Reference

Component Connector End Views (See: Diagrams\Connector Views)
Electrical Information Reference

Circuit Testing (See: Testing and Inspection\Component Tests and General Diagnostics\General Electrical Diagnostic Procedures\Circuit Testing\Circuit Testing)
Connector Repairs (See: Testing and Inspection\Component Tests and General Diagnostics\General Electrical Diagnostic Procedures\Connector Repairs\Connector Repairs)
Heated Oxygen Sensor Wiring Repairs (See: Testing and Inspection\Component Tests and General Diagnostics\General Electrical Diagnostic Procedures\Wiring Repairs\Heated Oxygen Sensor Wiring Repairs)
Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection\Component Tests and General Diagnostics\General Electrical Diagnostic Procedures\Circuit Testing\Testing for Intermittent Conditions and Poor Connections)
Wiring Repairs (See: Testing and Inspection\Component Tests and General Diagnostics\General Electrical Diagnostic Procedures\Wiring Repairs\Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions\Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Control Module References (See: Testing and Inspection\Programming and Relearning) for scan tool information

Circuit/System Verification

Clear the DTCs with a scan tool.
Operate the vehicle within the conditions for running and setting the DTC. The DTC should not set.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Ignition OFF, disconnect the HO2S 1.
Ignition ON, test for 2.9 volts between the HO2S 1 High Signal circuit terminal 6 and ground.

¤ If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
¤ If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.

Ignition ON, test for 2.5 volts between the HO2S 1 Low Signal circuit terminal 2 and ground.

¤ If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
¤ If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.

Ignition ON, test for 2.8 volts between the HO2S 1 Output Pump Current circuit terminal 1 and ground.

¤ If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
¤ If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.

Ignition ON, test for 2.8 volts between the HO2S 1 Input Pump Current circuit terminal 5 and ground.

¤ If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
¤ If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.

Ignition OFF, disconnect the ECM connector X1.
Ignition OFF, test for infinite ohms between each HO2S 1 circuit terminal and all other HO2S 1 circuit terminals.

¤ If less than the specified value, repair as necessary.

If the ECM and all circuits test normal, replace the HO2S 1.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Heated Oxygen Sensor Replacement - Sensor 1 (See: Powertrain Management\Computers and Control Systems\Oxygen Sensor\Service and Repair\Heated Oxygen Sensor Replacement - Sensor 1)
Control Module References (See: Testing and Inspection\Programming and Relearning) for ECM replacement, setup, and programming

 

P0301 - Misfire (Cylinder 1)
P0300 - Misfire
P0304 - Misfire (Cylinder 4)
P2626 - HO2S Pumping Current Trim Circuit Sensor 1
Po030 - HO2S Heater Control Circuit Sensor 1
P0130 - HO2S Circuit Closed Loop (CL) Performance Sensor 1
P0016 - Crankshaft Position (CKP) - Camshaft Position (CMP) Correlation

I'd say for the misfires check the gapping on those spark plugs or put stock ones back in. As for the HO2S (O2 sensor) seems like the first one is bad, replace it. As for the crank position issue, not sure about that

 

Changed out plugs for ac delco gapped at .43 , car still acting up
Now going to check on the oxygen sensor

 

I believe the proper gap on pump gas is 0.035. Someone correct me if I'm wrong. I'm at 0.028 on e47 myself.

 

Mine I believe are gapped at .035

 

Regapped mine to .34

 

I have also noticed that ever since my car started acting up this only happens when I start it , I can hear a rattling noise from the engine inly for like 2 -3 seconds

 

What kind of tune do you have? Did you replace that o2 sensor?

 

I bought the. Car tuned already, I believe it has the hptune noni have not how can I make proper sure of it being the whole problem, I did try something I disconnected the sensor and car kept working the same tried this several times

 

I could only assume that if you disconnect the sensor and it keeps running the same that the sensor is bad