Dave MacEslin

I inherited a 99 Grand Cherokee Laredo fro my mom recently. It has 75k miles on it as she drove it to library once a week in Pa. it sat idle for 2 years in their garage and had mice giving in it. There was a mouse nest in the air box

Car would stall after a few minutes of driving and popped a code for crankshaft sensor. Had a garage look at it and they replace the sensor. Do not know what troubleshooting they did. Car is still stalling after engine is warm and I still have the code

i have an Autotap scan tool and have been studying fuel trim on line. The upstream O2 sensor oscillates between .1 and .8 as expected. Fuel trim is terrible. I have attached a pic from my scan tool. The spikes in the green are from where I had to goose throttle to keep it from stalling

with this pic and crankshaft code what are recommendations? I am going to check camshaft sensor this Afternoon if rain stops

Ralph77

What brand CPS did they use?
Cause this is one of those things, among others, that the general consensus is only Mopar.
The whole bad out of the box thing with aftermarket parts.

Dave MacEslin

they usually get parts from NAPA