Re:NEED HELP FAST!
 

yeah thats what i'm saying, its gotta be something so stupid that i can't find it.. it will NOT happen in boost.. i held the rpms at 3000 rpms so i wasn't in boost... NO CEL... hit boost... NO CEL.... stopped... started to go and rpms drop and CEL comes on for MAP Sensor #3.

Re:NEED HELP FAST!
 

ok i just remembered this...

stock 88-91 si injectors are 240cc and i'm using 450cc injectors so..

240/450 = .533 so then 1 - .533 = .466 which comes to the 450cc injectors are 46.6% larger so on the V-AFC by doing 48% at idle i'm not giving it enough fuel.. correct?

Re:NEED HELP FAST!
 

Actually, the 450cc injectors are 87.5% larger than 240cc injectors. The 240cc injectors are 46.6% smaller than 450cc injectors. :P Did I confuse you yet? ;)

Sometimes when you are using such large injectors you need to take away more fuel at idle to make it idle right. Also, I don't think the % is completely accurate anyways. It doesn't take the signal from the ECU to the injectors. It takes the signal from the MAP and blah blah blah....don't know if you know this....

You shouldn't throw a MAP code when you're not even in boost so my guess is the wiring.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Re:NEED HELP FAST!
 

wiring for what? the V-AFC? i swear there is no connection to the MAP sensor from the V-AFC.. maybe i'm wrong but on the site i see no MAP sensor connection.

Re:NEED HELP FAST!
 

Jesus, I hope you're joking.........
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Re:NEED HELP FAST!
 

Re:NEED HELP FAST!
 

your map sensor needs to be hooked up to your vafc dude. how is it supposed to trick it if its not hooked up

Re:NEED HELP FAST!
 

ok could it be cause i'm throwing a #1 code but NOT throwing a CEL??? i put the o2 sensor on the hf manifold... was that not right? this is a question towards my idle going from 400 - 1000.

Re:NEED HELP FAST!
 

Hey i saw a post on automotiveforums that the V-AFC was actually throwing the code for the MAP sensor....

so how would the V-AFC throw the code?..... i guess i don't really get why it does.

Re:NEED HELP FAST!
 

so your vafc isnt hooked up to the map wire? if not u need to hook it up. in order to use the vafc hack to trick the map sensor. you have to have it hooked up. or it will never work. cause how are u supposed to map hack if u dont have the map hooked up