I'm not going to start programming stuff myself until the EBL comes out and was wondering if I'll be fine when I get my headers and duals on there (they're finally coming I'm pumped ) without touching anything until the EBL comes. How drastically does this affect things? Right now I'm running a rough tune from tbichips.com. I can send before and after logs if anyone needs. I'm not very good at reading them but from what I can tell right now it runs a bit rich until it warms up (123 BLM) then once its at operating temp it sits right at 128. The exhaust should be on by the end of Feb at the latest unless something rediculus happens and one of my parts doesn't come in on time.

 

I've haven't had a chance to read through all 6+ pages of the EBL thread. Have they said what the expected release date is an a rough cost? I think all DIY TBI'ers are anxiously waiting for this software.

 

What does EBL do?

 

Allows you to get a ton more data, a ton quicker, along with MANY other features. It is based off of an entirely new ECM code.

Nitrous Control
2-bar MAP
Rev limiter
Speed Limiter
Shift Light
Smart A/C clutch
PE Active Output

Are just a few of them.

 

2-bar MAP
whats this? I may use this as well as the smart A/C and rev limiter.

 

2-bar MAP lets you run boost (turbo, SC, blower, etc). Basically the ecm will register manifold pressures over normal atmospheric pressure at sea level. Youll be able to run up to ~14 psi of boost and have the ecm account for it.

 

Sounds good but we already run into fueling problems with just N/A motors. Guess I'll only be using 1 or 2 of the additional features, wish they would turn something like the speed limiter into the control for the EVAP system seems more of a PITA to have removed this feature above all others. EGR and the rest don't really matter but I can't see anyone wanting to ditch EVAP.

 

you always run rich on startup, it's called open loop. Your computer doesn't follow any readings from sensors in open loop, therefore it works on a set perameter which is usually pretty rich.

Once at operating temperature you are in what's called closed loop. This is when the computer starts taking the 02 sensor readings to help give you the perfect 14.7 to 1 a/f ratio, when you hook them up to a scanner an easy way to sorta kinda check if the 02 is working properly is it will keep changing from lean to rich nonstop to maintain a very close to 14.7 a/f ratio..

 

Well that explains that, but what is this exhaust going to do to my car, going from a single 2.5" pipe with factory manifolds to headers w/ dual 2.5" is a huge difference.

 

TBI G-series vans did not use a canister purge solenoid, the canister has 2 ports, fuel tank vent and ported vacuum from the driverside of the TBI. As long as you are above idle there is vacuum on the canister and it purges.s

 

That still means I have to switch over to that style canister and run new lines doesn't it? Or is mine already setup for it I just have to take out the solenoid?

 

Just take the solenoid out, use a vacuum line reducer (can't think of the name, you can get them in the HELP section at Autoparts stores). Then run the hose to the driverside front fitting on the TBI.

 

I think you'll be good to go, these computers operate fine until things are out of range. Every sensor has it's own set paramater and most of them are fairly wide ranged for a stock application, that way they can adjust themselves as the engine wears and slightly loses compression and such.

Some people say they do runner leaner which i could beleive but, if they do, it's not enough to realy worry about i wouldn't think.