Common questions

Where is the DLC on a GM 94?

Where is the DLC on a GM 94?

Locate Data Link Connector (DLC), see image below. Turn Ignition switch to ON position. Count the flashes on the “ CHECK ENGINE ” or “ SERVICE ENGINE ” light. NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required.

What are the OBD codes for GM cars?

GM OBD1 Codes 13 O2 sensor or circuit 23 MAT circuit IAC sensor (95 models) 24 vehicle speed sensor 22 TPS out of adjustment 25 MAT circuit

What should the fuel pressure be on a GM 93 Blazer?

This is the procedure for checking for an internal fuel leak on your 1st gen GM 4.3V6 with the CPI engine in it. This is my 93 Blazer in the test. Fuel Pressure should be 58-62 psi, and it should hold that pressure, and hold it when turned off as well. I have a leak inside my upper intake as I show you in the video.

What causes a GM engine to set code 42?

When the engine speed exceeds 400 RPM, the ECM sends a BYPASS signal to the ignition module which switches the timing to ECM control. The ECM calculates what the timing should be then “tells” the ignition module via the EST circuit. An open or ground in the EST circuit will stall the engine and set a Code 42.

Where can I Find my GM trouble code?

If you own a 1982 to 1995 GM car or truck, you just might be able to read your trouble codes for free! If you have a connector like this under your dash, read on… (note: this connector may have a black plastic cover over it, so also look for a cover shaped like this, sorry for the messy wires here)

What does code 12 mean on GM OBD?

The system will enter the diagnostic mode. In this mode, the computer will display a Code 12, three consecutive times, by flashing the “CHECK ENGINE”, “SERVICE ENGINE SOON” or “MALFUNCTION INDICATOR LAMP” or light. A Code 12 consists of one flash, a short pause, then two flashes in rapid succession.

What does code 32 mean on a fuel injection computer?

Rough idle. Code 32: EGR System Problem. Code 33: MAP Sensor Signal High. Bad gas mileage. Won’t pass the state mandated emission test. The fuel injection computer is the one that regulates the opening and closing of the EGR valve thru’ the application and release of vacuum (through a vacuum solenoid).

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

Do you need a scanner for a GM 94?

NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required. NOTE: Some 94 & 95 models that DO have the A & B terminals still require a scanner. All vehicles after 96 are OBDII,and require a scanner to access them.

What does it mean when your GM Truck is running very rich?

It sounds like your truck is running MAJORLY rich, though. Which usually (if no CEL) indicates one of the primary sensors used to calculate base fuel trim is bad; but not bad enough for the PCM to raise a red flag and disregard it.

Why does my Silverado Sierra run too rich?

I have ran a misfire diagnostic with the scan tool with the engine light on and the engine misfires quite a bit, as it will if it is over fuelling. After deleting the codes, the truck seems to run fine and no misfires. I have changed all spark plugs, I have cleaned my mass air flow sensor and map sensor with no difference made.

What kind of smell does a GM Truck have?

The smell is unmistakable, it’s not like a faint odor, it’s full on ’72 Plymouth beater mode running rich smell. Even today as I was shuffling cars around the driveway, the smell of the newer one compared to my ’04 Silverado is night and day.

What causes a GM truck to stop running?

A stuck-open purge valve should actually produce a lean condition, as it’s essentially a vacuum leak. Stuck closed (more common, since there’s a spring that should make the solenoid fail in that position) will cause no running issues, just a CEL for insufficient flow (since it’s a GM, it will probably just throw p0440 for anything evap-related…).

What are the trouble codes on a Mitsubishi?

Diagnostic trouble codes may be cleared by disconnecting the battery ground cable for at least 20 seconds. Reconnect negative battery cable and recheck codes to confirm the repair. Oxygen sensor fault. Airflow sensor fault. Intake air temp sensor fault. Throttle position sensor (TPS) fault. Idle speed control (ISC) motor position sensor fault.

What are the Diagnostic Trouble Codes for pv101?

Diagnostic Trouble Codes Text Translations provided by: PowerView Model PV101 software version Murphy 1.00.06 PowerView Model PV100 software version Murphy 2.09 0710170 12-13-07 Section 78 Note: This list represents text descriptions for faults supported by the PowerView and does not necessarily comply with SAE J1939.

Locate Data Link Connector (DLC), see image below. Turn Ignition switch to ON position. Count the flashes on the “ CHECK ENGINE ” or “ SERVICE ENGINE ” light. NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required.

Where is the assembly line data link on a Chevy?

Open your Chevrolet’s driver’s side door and find the Assembly Line Data Link. The ALDL, for all General Motors vehicles, will be found directly below the steering column, in the center of the dash’s underside. Run a length of jumper wire between the ALDL’s “A” and “B” ports.

Where are the fuse panels on an Oldsmobile eighty-eight?

Here you will find fuse box diagrams of Oldsmobile Eighty-Eight 1994, 1995, 1996, 1997, 1998 and 1999, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

What does a data link connector diagram show?

The Data Link Connectors wiring diagrams show the circuits by which the various on-board computers exchange information, and the diagnostic connectors used for diagnosis and their location. The Ground Distribution wiring diagrams show all vehicle ground points, their location, and the components common to those ground points.

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Ruth Doyle