So my truck is running terrible, just no power what so ever. I put a vacuum gauge on it and it pulls a steady 14hg while idleing and around 10 hg with the throttle half open, but as soon as i crack the trottle the vacuum goes to 0 and the engine almost goes dead like it choking out then the RPM start to rise like they should. If i crack the throttle and close it quickly it backfires throught the intake. Anybody have any suggestions?

 

Anybody?

 

wat year is your truck, miles?etc. Did you do anything recently to the truck, Have you done proper maintenance? Need some info on the truck, then I hope I can help.