Alright my car dies after long freeway drives or after some hard pulls. Never happens if I drive in the city or crap like that. After being on the freeway for awhile and stepping on the clutch, coming to a stop my car will not idle. It just dies once i press on the clutch the car drives and runs fine. Any suggestions? my TPS on neptune reads -% numbers. Could this possibly be my problem. This started happening after I installed Neptune.

 

I would start by cleaning your idle air control valve... oh and put a new seal on b!tch too, they look like an "8".
to clean it, remove the valve via 2 12mm bolts on the back of your int. mani, unplug the sensor, and the two coolant lines (rags are useful here) and then just spray the crap out of it with brake cleaner. let it air dry for 20-30 minutes or so and slap it back on...dont forget the new seal. it may be that simple or it may not be but at least you have somewhere to start.

 

I know how to clean that, but thanks. Im pretty darn sure its not the IACV. Its more of a fuel/ignition issue.

 

can you remove that neptune you installed and see if the problem goes away? maybe there is an issue with the neptune?

 

ecu swap is in order.. mby wrong tune?

 

I posted it on hrtuning.com and HRtuning idicated that it is tuning issues. Iacv/ fuel cut. So ill check it out and see what happens. And Rick it did not occur with Crome so it had to be with the new settings that I probably did not adjust yet.