injectors

**Black beauty** · 11-30-2013, 02:59 PM

Ok guy could a stock lt1 run 30lb injectors with no problems I am changing out old ones

**5.0THIS** · 11-30-2013, 11:01 PM

What leads you to believe you have an injector problem?

**Black beauty** · 12-01-2013, 12:09 AM

When I get down on it hard it doesn't open up as it should might even b fuel filter what do u think. It started after a tune all plugs are good and intact and it lightly back fire some time ant idea

**35th-ANV-SS** · 12-01-2013, 12:13 AM

It it started after a tune, I'd be taking it right back to the tuner before throwing parts at it.

**Black beauty** · 12-01-2013, 12:56 AM

Sorry I meant tune up

**35th-ANV-SS** · 12-01-2013, 01:33 PM

I'd pull the spark plugs and look at them. Also, make sure all the wires are securely snapped on. Maybe one is loose.

**Black beauty** · 12-01-2013, 05:00 PM

What cause raw fuel my plugs are black and just put them in last week and I check all plugs and one was loose thanks

**5.0THIS** · 12-02-2013, 01:09 AM

It's either running too rich, or it's misfiring and not burning the fuel that's going into the cylinders. Have you scanned the car or had it scanned to see if there are any codes, and what things looks like as it is running (fuel trims, misfire counts, o2s, etc)

**Black beauty** · 12-02-2013, 06:14 AM

both running rich and missing

**35th-ANV-SS** · 12-02-2013, 09:55 AM

The car is still missing after you fixed the plug wire that wasn't on all the way? Did you gap the plugs properly, or did you just install them as they came from the factory?

I would check for vacuum leaks next I think. Running rich means you have more fuel than air coming in...so it's possible your O2 sensors are lazy or you have false unmetered air being read (vacuum leak) causing the PCM to dump more fuel in to compensate.