i have a stock 98 A4 1.8t (AEB). i just instld a boost gage and it only reads up to 4psi max whn i step on it.
is that normal or is it in some limp mode?
i've already check for leaks and i have none and i have no codes.

thnks for the feedback !
;o)

 

hmm you must have something goin on. and i dont think your car has a 'limp mode", stock is around 7-8 psi i think

 

How much vacuum is it showing?

 

when idling not moving at all

 

yes it does, and its in it

 

did you use vagcom to scan for codes or what? because I believe limp mode will throw a code somewhere

unconnecting battery for ~5 mins may reset limp mode

 

i used an OBDII scan/erase to scan for any codes. at idle its at 20-21 In Hg. at speed its at 0. when i step on it, the gauge reads 3.5-4 psi at most.

the boost gauge is a VDO (30 In Hg - 25 psi) from apr

 

sounds like you are either in limp mode or you have a boost leak...

 

i'll try disconnecting the bat for 5 min n see if the works. but how do u check for boost leaks? and whr the most common places for it to leak?

im just wondering, whats the highest you can boost a K03 and a k04?

once again, thnx guys for the info

 

Stock boost should max out near 8psi, chips will max out near 20psi, anything over that is going to be risky for the ko3

sounds to me like a boost leak