Causes For Running Rich

[rude_life]

I have been getting a very strong smell of gas when i get out of my car or while im outside of it while its still running...So i put her up on 4 Jackstands and did i complete check of my fuel lines, filter, and tank area..No leaks, so im convinced that the smell is just my exhaust. Therefor, she must be running really rich. I am getting horrible gas mileage and im nervous that my car might catch fire. I replaced the 02 sensors last week, and cleaned the MAF and ACT sensor. I have also replaced (and gapped) the Spark Plugs and replaced the Wires( FRPP 9MM). I run 91 Octane only. I can hear the Fuel Pump whining and it sounds like it's stumbling. I am convinced it is running rich...What are the main reasons for our cars running rich? WHich direction should i go now?


Thanks....Kris

 

[S/CBlack95GT]

You will not smell raw gas if it is running rich. Did you check the engine bay and make sure you dont smell gas while it is running?

 

[HISSIN50]

agreed. also, dont forget to take a peak at the charcoal cannister and associated lines. a leak or cracked cannister stinks.

good luck.

 

[rude_life]

Where could it be leaking from in the engine bay?? Im not sure if im smelling raw gas or just really strong exhaust. I do know im getting crappy gas mileage

 

[S/CBlack95GT]

Where could it be leaking from in the engine bay?? Im not sure if im smelling raw gas or just really strong exhaust. I do know im getting crappy gas mileage

If the car is just running very rich then the exhaust fumes will literally bring tears to your eyes.

As for a leak, It could be any of the 16 o-rings on the 8 injectors. The fuel pressure regulator could be leaking, as could the lines where they meet the rails and where they connect near the firewall on the passenger side. The best way to check for a leak near the engine is to let the car run for about 5 minutes outside, then turn it off and pop the hood. If the engine is leaking gas you will smell raw fuel when you pop the hood.

Just make sure you look over everything really well. If you can't find a leak then make sure you keep a fire extinguisher with you in the car. There could be a spot you missed and there is a potential for a fire.

 

[rude_life]

Thank you shaun for the advice.

 

[tderrick]

Did anyone mention O2 sensors?

 

[5.0nmalecek]

you had another post i think that you were saying that your car was really slow. I commented on there that it sounded like the SPOUT connector was out. Well gas fumes are another symptom I had when my spout was disconnected. the gas isnt being fully burnt so unburnt gas exits through the exhaust.

 

[5.0nmalecek]

Spout

SPOUT fo sho