First... I had my car tuned on Aem ems with two maps one on pump and one on e85... just recently when on pump my idle started to bounce around when car is warmed up... when on e85 map car doesn't do that....
Any easy fix or easy answer to this?
Second...
My car has two step and only builds about 5 psi....previous owner said that he was able to build to 10 plus...
???
Thanks for reading.

 

Are you the owner of Stevens old car?

PM me I can help u out

 

Pm sent.. thanks

 

i would say your fuel map needs to be tunned out just a guess

 

do u fix a switch for the 2 mapping?

 

Fix a switch? I have to plug in my laptop and swap maps if that's what you mean .. yes

 

Also how about change feom hot climate to cold.... that'd have an effect right.?

 

Ambient air temps certainly effect the tune, especially large variance in temps from when the car is tuned until now. As the temps are colder, the car will need more fuel or else it will run lean. Sometimes you may even have to pedal the car a bit to get it to start and stay running if its really really cold. If the tune in the car is decent, having a tuner clean it up for the colder temps should be quick and inexpensive, probably just an hours worth of tuning time while street driving.

 

100% Correct

 

You could wire a switch and set it up to switch a "nitrous" map, which would enable a fuel and ignition correction map to be able to correct for the differences between gasoline and E85.
The best option would be 2 full maps and uploading them via your laptop. This way you can tweak other settings such as idle.

 

If you are running speed density then your AIT sensor can become heat soaked while parked. After there there is a table AIT Correction, and if that is all 0 then you need to adjust tha ttable to correct for the air flow. Cold air requires more fuel and hot air requires less fuel. Most tunes I have seen do not have this table adjusted. Most people rely on 02 feedback to make the corrections for air temp.

Sounds like you might need to get a touch up tune.