Rlamburgy 6/11/2010

1998 GMC K3500 Sierra SLT 8Cyl7.4L - Engine

Follow

What could be causing the truck to run like it is missing out and smells rich?

2 days ago had left cat replaced and yesterday had right one

Answer This Question

Follow Question what's this?

( characters left)

Add Answer Community Guidelines

answers

• 
  Nissan Technical Advisor 3/18/2011

  There are many possibilities, like blown head gasket, defective ignition coil/s, incorrect ignition timing, bad O2 sensors, bad ECM. Did you already check the engine ,with a scan tool. That should be the first thing you did. Get the codes and post them here so that we can help you solve this.

  Reply

  0