I get a 99 chevy subarban c1500 on idle missing in high speed very good. The truck is shaking on idle. Show codes po300, po172, po175. Check engine light on could you tell me what is wrong.I did tune up and change brand new fuel pump. Still the same missing.I wonder where is fuel pressure regulator at?If you can answer me all these questions I will appreciate. Thank again.
Friday, September 23rd, 2011 AT 6:40 AM