Noob DSMlink question

[teamo2t]

Well I am trying to make sense of the tons of info I have looked at about tuning and I have lots to learn!

I recently installed 880cc inj and 190 walboro along with DSMlink. I was doing the "rough" tune at idle etc.

I think I may have a boost leak, but I want to make sure my logic makes sense. (I will be doing the boost leak test this weekend.) airflow per rev is at .17, LTFTlo is at around 12.1 and LTFTmid is at 2.1. Vacuum is good at 17 at idle and up to 24ish at decel.

I was expecting LTFTlo to be negative and airflow/rev to be a bit higher... If I am asking a retarded question just let me know, and I will just boost leak test and keep reading, but I would appreciate any expert insight... Thanks.

 

[Spln_Hrd]

Read the manual and adjust your fuel trims via airflow by datalogging mafraw.

Also do the boost leak test regardless.

www.jeffgst.com will help you with fuel trims.

 

[TSG59_Steve]

In my opinion you should ask this on the DSMlink forums.

 

[snowborder714]

Your goals for the values in question are as follows:

AirFlowPerRev (at idle) - .31 +/- 10% (.28 - .34)
LTFT Lo - x→0, (0 +/- 5)
LTFT Mid - x→0, (0 +/- 5)

But, before doing any tuning, make sure you've done all of this:

1. Make sure timing's correct
2. Make sure fuel pressure's correct
3. Make sure you have no boost leaks
4. Make sure everything else is in good working order.

 

[teamo2t]

Thanks all... Well I read the manual but there is so much info it is a lot to digest. No problem, I appreciate the input and the info. I will keep on reading. I did a quick boost test (not to much time available yesterday) and there are a few small ones that I fixed, but there is one at the throttle body that will not go away! The bolts are torqued and the gaskets are new (less than 500 miles). Any hints? Can I spray copper RTV on a new gasket?

 

[snowborder714]

Is it a gasket or might it be the shaft seals? Spray some soapy water on the throttle body next time you do a test to pinpoint where the leak is coming from.