Ive had this swap running for 3 months now. Been running without codes for a month or so. Now the issues are after warmup the engine just doesnt want to idle. It will drop to 500 and sometimes 400rpms idling. This cause it to shut off sometimes. Also I've been getting 200 miles to a tank, full tank down to completely empty. What could cause this?

 

Clean the iat...iacv...and fitv sensors.
Cold start...
Let engine fully warm up...
Adjust idle screw

 

Does it have a seeking idle problem?

 

Just had to wire the map straight to the ecu last week. The map code just showed up again. Could this be all the problem? How often to map sensors actually go bad? I can always tell when the map code is on because you smell the rich gas while driving and the cel is on.

 

changed map, cleaned fitv, changed eacv no change still getting about 20mpg. was getting 28 city 34 highway when my engine was burning oil and had a bad headgasket

 

Im assuming all of yuour vacuum lines are on correctly and none of the hoses have cracked or popped off?

 

only questionable one is the pcv valve and line

 

You can't really mix up the pcv valve lines, seeing as they are the biggest ones coming off the manifold.

 

I meant the pcv hose broke going to the breather box broke and I replaced it and the pxv with a used one. Don't see how that would effect gas mileage tho