problems with loading a tune to the EEC via a Tweecer

[astar]

I am trying to get my 95 Mustang GT to start by writing new tuning parameters to the EEC using a Tweecer. To be safe I ordered a base tune from Tweecer. I would like to find out whether the car is sees the new tune, because it still floods when I try to start it (the same as with the factory settings). The main problem is getting 42# injectors to work (needed with the blower I have installed).

I installed CalEdit on my laptop and was able to write the new tune to the Tweecer on position 2 (connected to the EEC with the car turned off). I then restarted my laptop and read from the Tweecer set at position 2, and I verified that the new tune in CalEdit (I checked parameters such as the injector slopes for the larger injectors).
I then turned on the ignition without cranking the car, set the Tweecer to position 1 and verified that ther was comuniction with the EEC by reading the stock settings froim the EEC (I now see the stock settings on position 1).

I then tried to start the car with the Tweecer set at 2. The car floods and will not start. I checked the spark at one of the plugs and fuel pressure at the rails. The timing is set at 10deg, the pressure is ok and there is spark delivery. The only thing that comes to mind is that the EEC is for some reason using the stock perameters.

Am I doing something wrong, and the new paramters are not being read by the EEC ?
Any help would be greatly appreciated.

 

[Steven]

Whats the fuel prime percentage set at? Typically you run into problems with larger injectors and priming to start. If it's spraying way to much, it could easily foul the plugs. It may just be set wrong.

 

[astar]

where do I find the fuel prime percentage? Unless you mean the crank fuel pulswidth function?

 

[Steven]

Sorry I'm not completely familiar with tweecer. I've heard that the fuel tables for the tweecers are difficult to get correct, hence why alot of people have issues tuning with them. Obviously somewhere along the lines the cars being flooded out. It may be reading incorrectly or as your proposed not loading the file correctly.

 

[MikeF]

i have factory setting on my computer and it starts and runs fine idles as long as i want it to without loading up so as for as starting is concerned cant you set it up like fact file for start up.just my 2 cents because i dont have tweecer rt but have herd they or hard to learn

 

[2002BLGT]

what are your injector slopes at ? what Maf are you using , what values do you have loaded in the MAf Transfer function ?

 

[astar]

The injector slopes are at 42,4987 high and 50,4999 low.
The problem could be the MAF transfer function, because I did not have data from the manufacturer. I am using a PMAS 75mm meant sold for 42# injectors.

 

[MikeF]

thats what it looks like to me.somehow in the tweecer i think you can set up mass air im guessing i think paul could help you better but i think you need to communicate between your tweecer and comp and tell comp what mass air you have with what inj.but whatever it is keep us posted.im about to get a tweecer after x-mas how do you like yours was it as hard to use as people have made it out to be