How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Scott K Your Own Question
Scott K
Scott K, ASE Master Tech/Instructor
Category: Chevy
Satisfied Customers: 1569
Experience:  20 yrs Experience; GM factory Training ASE Master Certified with L1 advanced engine diagnostics
Type Your Chevy Question Here...
Scott K is online now
A new question is answered every 9 seconds

1998 chevy: pickup..code reader..P1345 Camshaft..Crankshaft Position

Customer Question

I have a 1998 chevy silverado pickup. I just put a new engine in and when I start it up the engine light goes on. I hooked up my Innova 3100 code reader and the message I get is, P1345 Camshaft to Crankshaft Position Correlation Fault. Does this mean the timing is off? If not, what is this telling me?
Submitted: 9 years ago.
Category: Chevy
Expert:  Scott K replied 9 years ago.


Welcome to Just Answer,

Your distributor needs to be reset in block correctly, sometimes a scan tool capable of reading timing data is needed to set the timing of the distributor.

Rotate the number 1 cylinder to Top Dead Center (TDC) of the compression stroke.
Object Number: 301395  Size: SH

  1. Align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear (3).

    Notice: The ignition system distributor driven gear and rotor may be installed in multiple positions. In order to avoid mistakes, mark the distributor on the following components in order to ensure the same mounting position upon reassembly:

    The distributor driven gear
    The distributor shaft
    The rotor holes
    Installing the driven gear 180 degrees out of alignment, or locating the rotor in the wrong holes, will cause a no-start condition. Premature engine wear or damage may result.


    Notice: Installing the driven gear 180 degrees out of alignment, or locating the distributor rotor in the wrong holes, may cause a no-start condition. Premature engine wear and damage may result.

  2. With the gear in this position, the rotor segment should be positioned as shown for a V6 engine (1) or V8 engine (2).
    The alignment will not be exact.
    If the driven gear is installed incorrectly, the dimple will be approximately 180 degrees opposite of the rotor segment when it is installed in the distributor.

    Object Number: 34397  Size: SH

  3. Using a long screw driver, align the oil pump drive shaft to the drive tab of the distributor.
  4. Guide the distributor into the engine.

    Ensure that the spark plug towers are perpendicular to the centerline of the engine.

    Object Number: 4350  Size: SH

  5. Once the distributor is fully seated, the rotor segment should be aligned with the pointer cast into the distributor base.
    This pointer may have a 6 cast into it, indicating that the distributor is to be used on a 6 cylinder engine or a 8 cast into it, indicating that the distributor is to be used on a 8 cylinder engine.
    If the rotor segment does not come within a few degrees of the pointer, the gear mesh between the distributor and the camshaft may be off a tooth or more.
    If this is the case, repeat the procedure again in order to achieve proper alignment.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Install the distributor mounting clamp.

    Tighten the distributor clamp bolt to 25 N·m (18 lb ft).

    Object Number: 301393  Size: SH

  7. Install the distributor cap.
  8. Install two NEW distributor cap screws.

    Tighten the screws to 2.4 N·m (21 lb in).

  9. Install the electrical connector to the distributor.
  10. Install the spark plug wires to the distributor cap.

    Important: If the Malfunction Indicator lamp is turned on after installing the distributor, and a DTC P1345 is found, the distributor has been installed incorrectly.

    Repeat Installation Procedure 2 for proper distributor installation.



Expert:  Scott K replied 9 years ago.

Before removing the distributor bring cyl #1 to TDC check the crankshaft pulley timing mark it must be in the middle of the "v" on the timing chain cover, remove distributor cap and check to see if rotor is pointing directly to the "8" on the dist base. if it is"off" just a little to either side loosen dist hold down bolt and rotate base to bring it inline with the '8", install cap back on and clear codes and restart. If the rotor is not pointing at the 8 and can't be rotated to the 8 the dist will need to be removed and set back in using the procedure in previous post.

Any more questions reply back