Does anyone know what will cause rough idle, poor gas mileage, a lack of power on acceleration and a smell of gas in the crankcase? Any help appreciated!

 

O2 sensor? Just from your description I'm guessing too rich, and I'm just guessing.

 

could be a number of a things easy to know if you pull the codes

 

its 86 22r carb auto tranny

 

Ive heard several things from, EGR to Fuel pump to Carb choke sticking. Dont know which way to turn.

 

Don't start spending all kinds of money on stuff. Check what you can for free first. I don't know anything about your engine but maybe you could pull off the carb and clean it completely. Do the simple stuff first.

 

Sounds like the fuel pump diaphragm sprung a leak. Pretty common on cam driven fuel pumps that are old or have high mileage.

 

theres a ton of things that could be causing it. Check simple stuff first. any other symptoms that could help narrow it down?

 

I think Im gonna try and replace the fuel pump thats the cheapest thing to try first. Ive heard that more from people than anything else.

 

Have you done a compression test on the engine yet?

 

Or 129 vaccuum leaks!