Crawford air/oil needs tuning???

STI-LOS · 05-21-2008, 07:20 PM

Hey whats up, I recently purchased a a crawford air/oil sep which eliminates the pcv valve I had it installed at a shop and I was getting a retune. The shop was saying and my tuner that the air/oil sp was throwing the fuel trims off they were reading positive 25 like if there is a massive vacuum leak.. They checked all the hoses on air/oil sep and its installed all correct according to crawfords instructions so they are good there. They tried to contact crawford and so did I crawford will not call back or help.. Has anybody seen this kind of problem? I know deleting the pcv valve and adding the air/oil sep but I think the +25 trims is just a massive amount. This has been holding my car up and I need my car back asap. Can anyone help me. Thanks

WESTI · 05-21-2008, 07:25 PM

hum i was gonna buy a crawford air oil sep but i oped for a cusco catch can instead. Id say just call crawford in the morning and see whats up. Nothing else you can really do right now

STI-LOS · 05-21-2008, 07:32 PM

Quote:

Originally Posted by WESTI

hum i was gonna buy a crawford air oil sep but i oped for a cusco catch can instead. Id say just call crawford in the morning and see whats up. Nothing else you can really do right now

I talked to Crawford they basically told me to go F MYSELF.. They would not let me talk to tech, they said its race week and the tech guy is to busy they have deadlines etc. I will post my whole experience later, but they told me and this is a quote "they have Had no problems with the air/oil separator and its not that important for tech and it would be a 50/50 chance that someone would get back to me on this.. Awesome right after paying $300+ for there catch can. At this point I take it off and get my car tuned cause I need it asap or I don't know??

blindfold · 05-21-2008, 07:37 PM

no tuning needed, what parameters has been changed that lead you to think tuning is involved?

Spoolin415 · 05-21-2008, 07:37 PM

Quote:

Originally Posted by STI-LOS

I talked to Crawford they basically told me to go F MYSELF.. They would not let me talk to tech, they said its race week and the tech guy is to busy they have deadlines etc. I will post my whole experience later, but they told me and this is a quote "they have Had no problems with the air/oil separator and its not that important for tech and it would be a 50/50 chance that someone would get back to me on this.. Awesome right after paying $300+ for there catch can. At this point I take it off and get my car tuned cause I need it asap or I don't know??

Crawford FTL.

I'd return it and give my business to someone like this who answers questions while he's on vacation halfway around the world.

STI-LOS · 05-21-2008, 07:41 PM

Quote:

Originally Posted by blindfold

no tuning needed, what parameters has been changed that lead you to think tuning is involved?

Well the only thing I know is that the shop and the tuner said that with the Air/oil sep on the fuwl trims read +25 like if there was a massive vacuum leak. They said if they went back to the pcv system you know air/oil sep off the car the fuel trims were normal. Thas why we called Crawford cause we think its something with the can.

But so you know Crawford told me they dont suggest anybody install there air/oil sep without a retune, they said any air/oil sep they install they retune for it...

blindfold · 05-21-2008, 07:51 PM

the a/o separator is a closed system, i do not see how it will create a vacuum leak, maybe it is time to get a second opinion from a different tuner. I am curious to find out an answer, maybe i'll learn something new today

STI-LOS · 05-21-2008, 07:57 PM

Quote:

Originally Posted by blindfold

the a/o separator is a closed system, i do not see how it will create a vacuum leak, maybe it is time to get a second opinion from a different tuner. I am curious to find out an answer, maybe i'll learn something new today

I am not saying there is a vacuum leak but the fuel trims being that off make it seem like there is. Its not the tuner he is saying it can be corrected but he thinks the can is doing it and we cant figure out why, Crawford should be able to tell us something. For them to say that they dont suggest anybody do this air/oil without a retune makes me think the can changes the parameters some how. You know..

r12rex · 05-21-2008, 08:15 PM

Wow. Well I have been running my can for over 3k now. TMIC version as well. No problems....although I am going to get my car logged pretty soon just to see how she's purring.

This is a bit disappointing as I'd expect a bit higher level of professionalism from them...especially being they are such a big company. Who knows...

Anyway, keep us updated...if this IS this case...I may yank mine out too.

Kind Regards,
Ryan

modaddict · 05-21-2008, 08:22 PM

AFAIK, there's no retune needed. It's a closed system.

I installed one with no changes to the tuning. You have a vacuum leak, I would suggest a smoke test of your intake system.

It aint the A/O separator.

1loudsti · 05-21-2008, 08:24 PM

Quote:

Originally Posted by Spoolin415

Crawford FTL.

I'd return it and give my business to someone like this who answers questions while he's on vacation halfway around the world.

im guessing you have one of these? i got some questions if you do!

(sorry for the TJ)

r12rex · 05-21-2008, 08:26 PM

Quote:

Originally Posted by modaddict

AFAIK, there's no retune needed. It's a closed system.

I installed one with no changes to the tuning. You have a vacuum leak, I would suggest a smoke test of your intake system.

It aint the A/O separator.

my thoughts exactly...Hmmm....

flatthump · 05-21-2008, 08:29 PM

You removed the PCV valve. You'll get a little more un-metered air into the turbo inlet tube. It will increase (positively) LTFC and STFC. Apparently, whoever tuned your car before, didn't tune the MAF very well. If the tuner tuned it to around + or - 5, you should be fine. No way your fuel trims shot up +25 because of this mod...unless there is a vacuum leak somewhere.

modaddict · 05-21-2008, 08:29 PM

the system is "post MAF". so the air that it is "sucking" has already been metered.

Again, it's a closed sytem, Just as is the OEM system. (post maf)

flatthump · 05-21-2008, 08:30 PM

Quote:

Originally Posted by modaddict

the system is "post MAF". so the air that it is "sucking" has already been metered.

Again, it's a closed sytem, Just as is the OEM system. (post maf)

Mmm not exactly. The "air" that's in the crank case is a mixture of burnt gasses, un-burnt gasses, Un-burnt oxygen, oil-vapor, and fresh air. The MAF only meters what comes through it, which is fresh air.

05-21-2008, 07:20 PM	#1
STI-LOS Silver Member Car: 06 STI / STG 4 Fav Mod: DOM 3.0R + METH!!!! Location: Vernon, NJ Posts: 1,194 Join Date: Jan 2008 Trader Rating: (4)	Crawford air/oil needs tuning??? Hey whats up, I recently purchased a a crawford air/oil sep which eliminates the pcv valve I had it installed at a shop and I was getting a retune. The shop was saying and my tuner that the air/oil sp was throwing the fuel trims off they were reading positive 25 like if there is a massive vacuum leak.. They checked all the hoses on air/oil sep and its installed all correct according to crawfords instructions so they are good there. They tried to contact crawford and so did I crawford will not call back or help.. Has anybody seen this kind of problem? I know deleting the pcv valve and adding the air/oil sep but I think the +25 trims is just a massive amount. This has been holding my car up and I need my car back asap. Can anyone help me. Thanks This ad is not endorsed by this member. Please register or login to hide this ad.

05-21-2008, 07:25 PM	#2
WESTI I'm Jim Halpert Car: 06 WRB STI Fav Mod: Ricer Flyby Location: Irvine, Ca Posts: 6,336 Join Date: Apr 2006 Trader Rating: (9)	Re: Crawford air/oil needs tuning??? hum i was gonna buy a crawford air oil sep but i oped for a cusco catch can instead. Id say just call crawford in the morning and see whats up. Nothing else you can really do right now

05-21-2008, 07:37 PM	#4
blindfold Silver Member Car: 2004 WRB STi Location: Atlanta,GA Posts: 2,005 Join Date: Aug 2006 Trader Rating: (14)	Re: Crawford air/oil needs tuning??? no tuning needed, what parameters has been changed that lead you to think tuning is involved?

05-21-2008, 07:51 PM	#7
blindfold Silver Member Car: 2004 WRB STi Location: Atlanta,GA Posts: 2,005 Join Date: Aug 2006 Trader Rating: (14)	Re: Crawford air/oil needs tuning??? the a/o separator is a closed system, i do not see how it will create a vacuum leak, maybe it is time to get a second opinion from a different tuner. I am curious to find out an answer, maybe i'll learn something new today

05-21-2008, 08:15 PM	#9
r12rex Professional STI Racer Car: 06 OBP STi Location: Orange County, CA Posts: 794 Join Date: Sep 2005 Trader Rating: (7)	Re: Crawford air/oil needs tuning??? Wow. Well I have been running my can for over 3k now. TMIC version as well. No problems....although I am going to get my car logged pretty soon just to see how she's purring. This is a bit disappointing as I'd expect a bit higher level of professionalism from them...especially being they are such a big company. Who knows... Anyway, keep us updated...if this IS this case...I may yank mine out too. Kind Regards, Ryan

05-21-2008, 08:22 PM	#10
modaddict Spec C Club Car: 04 Crawford STi Fav Mod: CP35r 440whp Posts: 2,008 Join Date: Jun 2006 Trader Rating: (3)	Re: Crawford air/oil needs tuning??? AFAIK, there's no retune needed. It's a closed system. I installed one with no changes to the tuning. You have a vacuum leak, I would suggest a smoke test of your intake system. It aint the A/O separator.

05-21-2008, 08:29 PM	#13
flatthump Enginerd Car: The Spaze Mobile Fav Mod: Tuning Location: South O.C., Ca Posts: 13,020 Join Date: Jan 2006 Trader Rating: (5)	Re: Crawford air/oil needs tuning??? You removed the PCV valve. You'll get a little more un-metered air into the turbo inlet tube. It will increase (positively) LTFC and STFC. Apparently, whoever tuned your car before, didn't tune the MAF very well. If the tuner tuned it to around + or - 5, you should be fine. No way your fuel trims shot up +25 because of this mod...unless there is a vacuum leak somewhere.