I was just trying to dig up some info about fuel injectors that malfunction after returning from cleaning/balancing (like trying to find a needle in a haystack) and I found this on an Audi page:



So I'm wondering - could the injectors on my s4 NA be retrofitted/redressed with Viton inside the tip area, as described above? I'd do it in a heartbeat if it would end my new BS flooding probs. This is assuming that the Audi injectors have a similar internal arrangement to our own.

Here's the page, which includes schematics (sort of) of the Audi injectors...

http://www.sjmautotechnik.com/injector.html#inject

 

dude, the audizzle is cis, its totally different than efi.

look for vacuum leaks, they will also cause flooding

 

I've lost track of the number of times I've had my manifolds apart in the last 12 months. Right now my idle is rock steady at 750, several vac lines have been removed and what remains are all new silicone. There are no vac leaks on this girl.

 

you sure all the lines go to the right nipples? i had a crossed line on my t2 that made it flood on hot starts

 

Ive also heard the FPR line can cause this but have read differing accounts on which nipple it is. Anyone care to chime in?

 

i had to trace each line from the part (fpr, acv, etc) to the correct solenoid. it took about an hour with the book. car went from flooding hot to wanting to start hot

 

I'm sure, but I'm certainly not above going over everything with the FSM the next time I'm in there.

 

Hm, I have no solenoids......

Can you give an description of which nipple you have yours going too? (FPR)

 

Was this for me?

 

it needs to see intake vacuum and pressure. all else fails hook it to the spot that the solenoid got its signal from.