Can't get this right

[eclispe1]

Alright I have purchased the injectors and should have them installed this weekend.
I bought Siemens Deka "mototron" EV1 60lb/hr, now my question is what is the best way to set these up. After reading a few posts there seems to be several ways to tell the computer about the larger injectors. Can someone enlighten me on the best way?

[johnv]

this is what i use for the same injectors, runs fine.

You will need to go through the Auto VE process again though.

[eclispe1]

Ok the injectors are in and it seems to running fine except when you let off of the throttle it goes way too rich and it is really rich at idle. If someone could help me get it to a decent tune I would greatly appreciate it. I love this car and it keeps getting better from all of the help this forum has offered.
I could not do it withiout you guys, thank you....
Attached is my latest tune set up for the 60 lb/hr injectors and a quick log file.

[johnv]

use this tune for your auto VE tuneing.

there is no need to make PE table 14.63 when tuning , infact its risky on a boosted car. You will find looking at future logs even if commanded fuel changes as it does when car enters PE the Ben factors are still a factor of commanded verses actual AFR so the corrections will still be correct.

You will notice I have modified your commanded fuel table, and altered the parameters for power enrichment so it wont actvate until a MAP of 115-( a couple of ps1 of boost) This gives a better tansition of fueling as you enter boost.

You are just going to have to work on your VE tables now to get your fueling into line so actual = commanded. Idle should be easy to correct with the VE table.

once VE is dialed in it shouldent go rich on decel and you can also activate DFCO to help out there.

[eclispe1]

Hello Johnv,

I tried your tune and the AFR was all over the place and the car did not run right at all. I gathered data and did the first autove swap (log 39) and it made it worse. I will post both logs and the tune and see if you can see where the problem is. I looked it over and can't figure it out. It is still going way rich when you let off of the throttle.

[eclispe1]

I will rescale the map sensor to the old one, I was trying to avoid that but I guess it has to be done. I'm sure my wideband is dead on as I just did a new sensor and freeair calibration before I put the new plugs in, now maybe 30 miles since then. When it went into the 17afr range the car sputtered really bad so I'm positive it is working well. Could my settings for the new injectors be off? Maybe I missed something when changing values.

[johnv]

sure my wideband is dead on as I just did a new sensor and freeair calibration before I put the new plugs in, now maybe 30 miles since then. When it went into the 17afr range the car sputtered really bad so I'm positive it is working well. Could my settings for the new injectors be off? Maybe I missed something when changing values.

Yes your wideband is prob accurate , but its the numbers that EFIlive translate that can be off a bit useing analog output due to voltage offsets etc were as with serial cable what your wideband reads is what you see in the logs.

Your injector setup should be fine, its just a matter of dialing in your VE tables so commanded fueling is the same as actual.

Also what filters are you useing on your Ben map before pasteing into VE table ?

[eclispe1]

The MAP was off. The stock sensor reads 31 in hg and the 2 bar reads 29.2 in hg key on engine off. I don't know how to convert it so that it reads correctly.

[johnv]

Okay you need to follow the 2 bar operating system tutorial and make changes to the value in C6301 until the 2 bar sensor reads 31 (same as 1 bar sensor) can't recall wether you have to increase or decrease value, bit of trail and error sorry, but won't need big changes maybe add 2 or 3 and log it.

[joecar]

From the COS tutorial, page 14:

Configuring a 2 or 3-bar MAP sensor

When the key is on but the engine is not running, the MAP sensor reads the barometric air pressure, usually 101kPa (14.7psi). When tuning in high altitude areas it is worthwhile reading the MAP values (using EFILive’s Scan Tool) at key-on with the standard 1-bar sensor to obtain the barometric pressure at the current altitude.
After fitting your 2 or 3-bar MAP sensor, you must rescale the MAP sensor.

Engine Diagnostics->MAP->Parameters

• {C6301} MAP Sensor Scaler:

2-bar sensor: 190
3-bar sensor: 288

These values will get the MAP scaler’s value close to what it needs to be, you will then need to adjust it (by small amounts) until the MAP sensor reads the same barometric pressure that your standard 1-bar sensor was reading at key-on, engine-off.
Logging boost levels in the Scan Tool must be performed with the PID ‘SAE.MAP’.