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s4dc3
07-30-2010, 03:31 PM
00 1.8t quattro, i just got my boost gauge installed and i have no idea what the gauge is supposed to be doing while i am driving, how much is too much vacum and how much boost should it be reading at?

mnsirtee
07-30-2010, 03:49 PM
vac at idle should be reading around negative 16-18 and on deceleration in gear should be around negative 20-21. at full boost on stock should be around 9 and chip can vary from 15-20.

s4dc3
07-30-2010, 04:03 PM
ok thanks.is there any readings that tell me somethings is wrong??

mnsirtee
07-30-2010, 04:49 PM
if your reading is not within those numbers, there is something wrong.

s4dc3
07-30-2010, 05:43 PM
Mine reads -21 idle and at full throttle 15-20 but up untill now i was under the impression that it was stock(if someone did chip it i wont complain. The dude that installed it hooked the hose to the tube at the rear of the exaust manifold, is this a problem?

biketsai
07-30-2010, 06:03 PM
Mine reads -21 idle and at full throttle 15-20 but up untill now i was under the impression that it was stock(if someone did chip it i wont complain. The dude that installed it hooked the hose to the tube at the rear of the exaust manifold, is this a problem?

Yes, that would be a big problem! But I think that you just have some words mixed up, Im sure he hooked it up to rear of the intake manifold.

s4dc3
07-30-2010, 06:17 PM
What do you believe the problem could be?

s4dc3
07-30-2010, 06:19 PM
And yes i did mean intake not exhaust

mnsirtee
07-30-2010, 06:24 PM
those number looks right. Your car should be chipped. If not, then you have a problem.

s4dc3
07-30-2010, 06:51 PM
what do you think the problem could be? i also have a Sec air flow detected but all the hoses were checked for leaks and connection n it seems fine, when i take my car to my mechanic on the weekend what should i tell him to repair/replace?

biketsai
07-30-2010, 06:58 PM
Well you might not have a problem at all. Most likely it's chipped. If there is a leak, then you will not see a psi reading as high since air is leaking out.

walky_talky20
07-30-2010, 07:08 PM
You have a 2000, which means your car is equipped with a boost sensor. This simply means that the Engine Computer always knows exactly how much boost the car is making (even if you don't have a guage). If you were making boost pressure over 15 psi, and the car wasn't chipped, it would know this and would immediately throw a code for Overboost. If you don't have that code, then the car is expecting the 15 psi which means that you sir, have a chipped 1.8T.

As for the Secondary Air, Incorrect Flow code, your mechanic should check the operation of the items in the secondary air system:
- Combi valve
- Secondary Air Pump
- N112 SAI Solenoid Valve
- Vacuum lines between N112 and combi valve
- Vacuum source to N112

This system is super easy to diagnose with vag-com. If your mechanic doesn't have it, he will be doing it the hard way, or just throwing parts at it.

s4dc3
07-30-2010, 07:38 PM
ok thank you