First Dyno Run....help

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Oct 10, 2005 | 08:04 PM

#16

HobieKopek

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From: Long Island

Quote:

Originally Posted by impetus19

Any exhaust leak will register leaner than normal AFR's, b/c of oxygen getting into the exhaust..

Yeah, def. I'm assuming he would have heard or smelled that, but that certainly is another possibility. 18.0:1 is very lean though. That's basically what is/was happening to my car under boost too oddly enough. I've yet to get mine resolved due to other issues, but hey...I still have hope.

Oct 10, 2005 | 11:36 PM

#17

AznFlip

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Quote:

Originally Posted by HobieKopek

Well, assuming FMU's normally do provide acceptable AFR ranges (and I can only assume they do because I don't remember anyone who runs an FMU setup mentioning WBO2 readings), they were probably right. Either the FMU, fuel pump or both are crappin' out. Is this only happening at 5psi or does the AFR gradually raise building up to it? like 15.0 at 4psi or is it normally rich then shooting up? Is there noticable knock? Are you certain the WBO2 was calibrated correctly? Tryin' to think of variables to rule out, but I'm also writing a lot of papers all week so my brain's kinda in left field....

Here is my dynosheet.

The guy said it starts to lean out once it's boosted and I'm pretty sure their o2 sensor was working properly.

Oct 10, 2005 | 11:42 PM

#18

Lancerguy'03

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yeah there O2 is working correct....cause the numbers show that he is running lean. ill talk to u tommorw and hopefully get **** sorted out....with my hrs on the phone to Rock and trip to RRM....my hrs of dyno time and testing everything....i should be able to help...why am i not a guru....LOL

ALSO Intec racing is GAY AS HELL!! you should go down to AXIOM! much better there....i forgot the dudes name that works there but his is a turbo GOD! and also the owner of the shop LOVES!!!! Evos, STis and my car!

Oct 10, 2005 | 11:49 PM

#19

AznFlip

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Quote:

Originally Posted by Lancerguy'03

ALSO Intec racing is GAY AS HELL!! you should go down to AXIOM! much better there....i forgot the dudes name that works there but his is a turbo GOD! and also the owner of the shop LOVES!!!! Evos, STis and my car!

Didn't really care much, just didn't want to travel all the way to Tacoma/Lakewood for a baserun. But dyno tuning, I might . Well I'll just talk to you tomorrow.

Last edited by AznFlip; Oct 10, 2005 at 11:52 PM.

Oct 11, 2005 | 12:51 AM

#20

akasirlancerlot

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good luck

Oct 11, 2005 | 09:04 AM

#21

HobieKopek

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Yeah, that's exactly what happens on my car. If I had to guess I'd say it's the fuel pump. Guess we'll find out soon enough.

Oct 11, 2005 | 09:48 AM

#22

grubiaco

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lancerguy what was the problem with your setup?

Oct 11, 2005 | 12:26 PM

#23

AznFlip

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Quote:

Originally Posted by grubiaco

lancerguy what was the problem with your setup?

He had a bad fuel pump and it was causing him to run lean. Probably that's my issue, I'll find out tonight.

Oct 11, 2005 | 02:38 PM

#24

ozrally0303

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just out of curoisty why do these fuel pumps always seem to go wrong in turbo set ups i got the walbero 255 and was told its a good pump what are you guys using

Oct 11, 2005 | 02:42 PM

#25

Lancerguy'03

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ive had 2 WALBRO fuel pumps go bad on me.....duno why....

Oct 11, 2005 | 02:44 PM

#26

travelsize420

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he said he has a tre255 pump

Oct 11, 2005 | 02:45 PM

#27

ozrally0303

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ya i know but other guys have had the pumps go bad to just wondering why

Oct 11, 2005 | 05:40 PM

#28

Lancerguy'03

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no one knows....no one has really heard of this problem....

Oct 11, 2005 | 07:47 PM

#29

HobieKopek

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From: Long Island

Quote:

Originally Posted by ozrally0303

just out of curoisty why do these fuel pumps always seem to go wrong in turbo set ups i got the walbero 255 and was told its a good pump what are you guys using

Walbro 255. Not certain mine's the issue, but it still seems that way to me. It's fine until she starts building load. Positive boost pressure = problems.

Oct 11, 2005 | 08:20 PM

#30

TURBOit

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From: long island, ny

fuel pump problems aren't that uncommon, especially walboros, they can be bad, id buy a new walboro 255 stick it in and see what happens, even though he is running a tre

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