Secondary Air Injection System: Incorrect Flow Detected

[T7ODD]

In the end a garage got the Forge tip on for me. It seemed to pick up a little better and I also saw a small increase in boost on my gauge so I was quite chuffed but 1 week after fitting, the engine light on the dash came on. I've just run VAG-COM on it and it says:
'Secondary Air Injection System: Incorrect Flow Detected---Intermittent'
I'm not saying it is the Forge TIP but wondered if the increased air flow had anything to do with it. I've swapped the GFB dump valve back to the Bosch one incase it was a combination of that and the TIP. I've also cleared the faults with VAG-COM and disconnected the negative battery terminal for 20 mins. I guess I'll have to just wait to see if it happens again.

 

[wazo]

In the end a garage got the Forge tip on for me. It seemed to pick up a little better and I also saw a small increase in boost on my gauge so I was quite chuffed but 1 week after fitting, the engine light on the dash came on. I've just run VAG-COM on it and it says:
'Secondary Air Injection System: Incorrect Flow Detected---Intermittent'
I'm not saying it is the Forge TIP but wondered if the increased air flow had anything to do with it. I've swapped the GFB dump valve back to the Bosch one incase it was a combination of that and the TIP. I've also cleared the faults with VAG-COM and disconnected the negative battery terminal for 20 mins. I guess I'll have to just wait to see if it happens again.

ive had this fault ever since ive had my n249 bypass my car has never run better

 

[ibizacupra]

std valve working ok?

 

[acidstrato]

it probably wont come back straight away but might do at some point in the future

i just ignore it

 

[cu51pra]

isnt the secondary air pump there to warm the cat up?

 

[chris999]

yeah that is true. i have the fault aswell, everybody i hav spoke to about it hav said just to leave it. although the light will keep coming on and if there are any other faults you aren't going to realise unless you do VAG scans every so often!

 

[T7ODD]

So what causes the fault then as I've never had it before
After resetting the ecu and putting the Bosch DV back on it's running back to standard dead on 7psi whereas before it was reaching 8-9. Maybe it's the stock DV or could be because I reset the ecu. The fault hasn't come back yet.

 

[sedgers]

ive had it, basically check all your secondary air hoses i jus replaced them and my fault has cleared..........bobs your uncle £5 of clear hose........job fixed!! sorted

 

[T7ODD]

Well because of the long 'off-shoots' from the Forge TIP, the vacuum pipe from the DV is against the bulkhead and one of the pipes going to the N75(?) valve looks a bit pinched up. Is it safe to cut down these 'of-shoots' for a bit more room? What's best - stanley knife? hacksaw?

 

[acidstrato]

whats wrong with a pair of scissors? they aint that tough!

 

[T7ODD]

whats wrong with a pair of scissors? they aint that tough!

I heard something about damaging the thread in the hose.

 

[acidstrato]

rubbish!

chop em up, might as well get some silicon hose and replace the lot though.

 

[T7ODD]

rubbish!

chop em up, might as well get some silicon hose and replace the lot though.

Cool! I'd like to replace all the vacuum lines etc. Does anybody know the best ID size to use? Thanks!

 

[PhilW]

3mm vac lines i use, nice and snug.


Is that a blow off valve you've been using?

 

[T7ODD]

3mm vac lines i use, nice and snug.

OK thanks, even for the ones off the N75 valve?

Is that a blow off valve you've been using?

It was the GFB hybrid valve. I have the fault back again with the standard Bosch valve! People say things about the GFB valve but it's caused no problems for me. Sometimes it was blamed when it wasn't its fault. It did make a nice sound. My car's silent with the Bosch valve and Dynatwist.

 

[acidstrato]

u might need 4,5 or 6mm for the n75

 

[PhilW]

N75 is 8mm

 

[T7ODD]

Thanks, does anybody have any photos of their engine bay with silicone hoses installed? Thanks!

 

[mark_20vt]

yeah iv'e got this prob. had it for ages

 

[PhilW]

Taken a while ago...

http://img.photobucket.com/albums/v147/philwarren11/Cupra/DSC04008.jpg