Alright so i have a 1996 jeep grand cherokee loredo. Whenever i begin to come to a stop the idle will drop to around 250 and stumble until i come to a complete stop then it picks back up. I did a fuel pressure check and its around 48-50psi with just the ignition on and bounces around alot at about 50psi with the engine running. I have done some research and narrowed it down to either the fuel pressure regulator/ fuel pump, or the crank/ cam positioning sensor. What do you all think? anyone have this problem before?

 

ever cleaned the iac motor yet

 

No i havent even considered that, how would i do that?

 

remove it from the throttle body cleanit and the mounting hole reinstallhttp://www.jeepforum.com/forum/f11/iac-cleaning-618463/

 

I went ahead and cleaned it (it was deffinently dirty) but there was no difference in how it ran. im really starting to lean to maybe the 02 sensor or maybe a bad injector

 

check for codes b4 you start throwing parts at it ,then basics last tune up was

 

did you clean the mount hole also

 

is there any black smoke out your tail pipe can you smell gas?

 

I ran for codes a few time through out this process and it has come up with P0171 and P0133. No i didnt clean the mount hole i guess i overlooked that. As for black smoke i dont see any and no smell of gas.

 

i noticed that im having a leak that seems to be coming from my power steering pump somewhere and saw that there was fluid in the connector to the 1st o2 sensor. I cleaned that up and the code P0133 went away but P0171 is still there and the idle problem is still there.

 

ok so i went ahead and replaced the o2 sensor and it started running much better and now its running like crap again all the same issues. I can hear something rattling around in what sounds like my cat could that be to blame?