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 Jared D Your Own Question
Jared D
Jared D, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1501
Experience:  Shop Supervisor at County Fleet
62275574
Type Your Chevy Question Here...
Jared D is online now
A new question is answered every 9 seconds

Recently replaced fuel tank on 1998 chevy ck2500, now truck

Customer Question

Recently replaced fuel tank on 1998 chevy ck2500, now truck will not start. Fuel pump is working, fuel is getting to carb. Feels like an electrical problem. What should I try?
Submitted: 1 year ago.
Category: Chevy
Expert:  Jared D replied 1 year ago.

Have you tested for spark and ignition signal?

Here is the method to see if you have good spark:

1. Check for RPM in scan data while the engine is cranking.

2. If not present, check the Pink wire for 10+ volts while the engine is cranking.

3. Check for a 0-5 V or 0-12 V square wave on the Yellow wire from the Crankshaft Position (CKP) sensor, engine cranking.

4. If RPM is present in scan data while the engine is cranking, check for spark from the coil wire.

5. If spark is present from the coil wire, try a new distributor cap and rotor.

6. If no spark from the coil wire, check the White/Black wire between the ignition coil and the ignition module for a break.

7. Check Powertrain Control Module (PCM) connector condition.

Expert:  Jared D replied 1 year ago.

If you have good spark and it still won't start, try spraying carb cleaner or starting fluid down the throttle body and see if it will run for a few seconds. If it will, then there is a fault in the throttle body injection system.

Expert:  Jared D replied 1 year ago.

Here is the location of the CKP if you can't find it.

Expert:  Jared D replied 1 year ago.

I just wanted to check and see if you need any additional information. Also, if I have been of some assistance I would appreciate a positive rating. Thanks!