im running a gen 6 in my car and i cant seem to get it tuned corectly. wot is perfect but drivability is well not so drivable, the car hesitates and backfires through the intake when i step on the gas. i set the throutle cerection to the max and the map curection to the max, the problem wont go away. any and all help would be great. thanks

 

i got the same problem

 

are u using a wide band o2?for me being a begginer tuner i couldn't imagime doing it without one.i struggled with my gen 6 for a while until i got one.they say u could tune it with the a:f ratio scale in the base fuel map but i realy don't think its all that helpful.do u have the emic manual?if not pm me and i will send u a copy.
mike

 

Lean.

You can use the BS bar graph at the bottom as a tool, but having a WBO2 to tune with will take you out of the stone age. The throttle correction and map correction are not your problem, you need to fatten up the squares in the base fuel map where it hesitates and backfires. Use the BS bar graph at the bottom right as a guide, but only as a guide. Make some changes to fatten it up a little, and go by how it feels when you drive it over that stupid graph.

 

i only have acces to a wide ban o2 when the car is on the dyno, that is y the car is tuned correctly at wot. i may have to invest in a wbo2 that is mounted in the car. do you have any sugestions as to wich is a good set up?

i have not tride to adjust the bf map to much yet or have i used the bs bar graph, i will try that 2day and get back 2 you guys and let you know what happend.

thanks for the help so far this stuff is very frustraighting

 

Some dyno's can do a partial load to simulate cruising. I had mine done 2 years ago and they were able to do a good tune on the entire base fuel map. You might want to find a shop whose dyno has this ability.

 

well seting the base full map all across the board really helped out. there is still a little hesatation so i guess i will need to spend allitle more time in that area.

thanks for the help

 

You're welcome. I forgot to mention this book:

Tuning Accel/Dfi 6.0 Programmable Fuel Injection written by Ray Bohacz.

It's published by HP Books and has more info and the theory behind tuning the dfi. Good bathroom reading material, and will give you ideas of where to look to tune out your hesitation.

 

anyone having problems with later model laptops interfacing with their gen 6? I have an old old P1 that works fine, but my sony vaio with xp won't do squat.

 

you definatly can't use xp especially with a newer computer.it has to be a dos based os like windows 95 or 98.and the processor speed can't be higher than like 400mgz.(something like that)

 

damn, that's what I was dreading. Now I have to find a new battery for a 10yr old computer. what are the rest of you guys doing? Just got lucky with good batteries?

 

My buddy just gave me an old throw away thinkpad. Kinda funny, need an old obsolete laptop to run an old obsolete DFI setup (can't complain, it does work great).

I think this is the third or fourth POS old laptop I've gone through. I need to find a battery for this thinkpad, because it's the first one that doesn't lock up or have the screen flicker on and off.

 

i use a 12v transformer that plugs in to the cigarette lighter.see if u can find one for your computer....

 

Try running the laptop in safe mode. It may work, it may not.

 

Part throttle is a lot tougher to dial in than WOT. I've spent hours tuning the TPS and MAP enrichment tables, to get rid of the hesitation/bog when transitioning from cruise to WOT. It all depends on how quickly you step on the gas (rate of TPS change). Spend the $200, get a wideband to have when tuning with a bar graph, or borrow one. You'll see if it spikes lean, goes rich, and steadies out, and then be able to tune for the change. Correct me if I'm wrong, but the TPS enrichment is generally for the very first instant the throttle changes, and decays away very quickly, while MAP enrichment affects it a bit longer until it steadies out at WOT manifold pressure. Beg, borrow, or buy that wideband. You can also do part throttle tuning on the dyno too - just watch the wideband output, and don't worry about making a real pull.

 

You're correct. I think the analogy I read somewhere was the TPS enrichment is like an accelerator pump, and MAP enrichment is like a power valve when comparing them to a carb setup.

 

In reading the a/f bar gra;ph at the bottom of the base fuel map veiw...........if the bar starts at 13.5 and extends to the 14.7 range does that mean the ecu is correcting the fuel to 14.7 from 13.5 OR the a/f IS 13.5 ?

 

soory to jack this kinda but i have a gen 6 as well and was wondering if this lap top would work. it should since its windows 98 i just dont want to buy it then find out im stuck with an old school lap top for nothing
heres the specs on the ole girl
NEC 6030H Laptop Battery is good for 30-40 minutes. Windows 98 OS. 11 gig HD.
let me know guys. thanks
scott

 

what is the processor speed?i had a 500mgz imb that worked for me.i know i read that it was too fast but it worked.i now am using a 333mgz laptop and it works great.

 

anyone?.............I'm getting 17 mph and the wide band says no.........so why isn't it correcting?

 

I'm trying to remember without having my laptop to look at, but IIRC the bar goes two ways. To the left is fat and to the right is lean, with the center being 14.7. So if you don't see a bar going in either direction it is 14.7, and if the bar goes to the left it would be rich, etc etc. From my understanding, when tuning in closed loop the ecm is supposed to be correcting the a/f to 14.7, and the bar graph is showing you what the a/f ratio would be uncorrected in open loop . How fast the ecm can correct it, and how much of a % it can correct, I don't know. If you have a wideband, tune it in open loop for part throttle, and switch it back to closed loop when you're done. You might want to tune it for part throttle in open loop, and drive around a couple of days in open loop to make sure the air temp correction, coolant temp correction, or some other correction factor isn't throwing off the tune.

 

thanks........I'll work on it with the wide band ........get it closer to 14.7 and see what happens...