nascar2496

iTrader: (2)

OK, I have been reading the DIY prom threads for quite some time now. I am having a little trouble finding where to start.

Here is my setup and what I am using. 86 iroc, 305 with alumn 113 heads, lunati cam (mild nothing crazy), 5 speed, 3.27 gears, stock tpi and computer from a donor 86, wideband O2, headers/exhaust, stock intake.

I am using an 86 tpi bin (dont know the code), $32.xdf, and 1227165_160.adx (got the info from tunerpro's website. I read on the site that $32 is used for 86 and $32b is used 87-89. I dont think it matters as long as I have the correct year prom and supporting .ads file. Please correct me if I am wrong.

OK, so on a stock untouched prom (AFKX 2427) the car runs OK but its starving for fuel especially at WOT and part throttle. First start up takes a while (sits and cranks over several times) then starts and on the WBo2 the a/f is ~17-18. When it finally warms up enough to move the car without it stalling light throttle is very jerky (staving for fuel) a/f is ~16-17, and it idles at 1000-1200rpm. I have an autometer tach that is trustworthy unlike the stock one in the dash that is getting replaced soon.

That's what I have to work with, I dont expect anyone to give me anything just asking for a little help as to which tables to edit for what part of the drive-ability and what the values mean. For example, in the BPW fuel table on the left side is the RPMs 0-6400 and across the top is 0 16 32 48 64 80 96 112 128 ~ 256. I dont know what those numbers stand for/do.


Any help is appreciated.

Thank you!

MrWillys

Lets start with the basics. What injector are you using, and at what pressure?

Tuned Performance

iTrader: (92)

86 tpi is $32 but I don't recognize the broadcast afkx broadcast code.
Like mrwillys said start with checking your fuel pressure .
You might want to start with a $6e .bin and start with cl locked out start witch idle then cruise. There are sticky guides on tuning the 165 ecm.
What has been done to the tune so far ?

nascar2496

iTrader: (2)

I am sorry about that, I knew I forgot something.

They are 19lb Bosch 3's @ about 50psi Running an AFPR ( I bumped it up last year before I bought the tuning software and it helped alot but obviously its not perfect.)

@ tuned performance: Ok Ill see if I can find the $6e bin and all. I looked through the stickys before, maybe I missed it but I did see the section on the 165 but couldnt really find the specific tables to edit and how to enable closed/open loop. I have just been playing with tune a little, trying not to blow up the motor at the same time so Im trying to be very cautious on what and how much I touch. I have edited the fan temps, started with the MAF tables but one of the stickys said it was a bad idea and to just leave them alone which brought me to the BPW table. I disabled EGR because its non existant and im surprised that I never got a code for it.

MrWillys

q

nascar2496

iTrader: (2)

the last 3 are 771


No vacuum is 50psi. with vacuum I never checked. I was always told to set it without vacuum applied.


The wideband is from a company called Innovate Motorsports. Its a stand alone controller/O2. They sell an analog/aux cable that plugs into the controller, then one of the outputs is for a single wire o2 only computer. (obd1) It sees the O2 and everything just fine and it runs so much better with it then it did before the Wb.

MrWillys

So is the number 280-155-771? I can't find anything?

nascar2496

iTrader: (2)

yes,


there ya go.. thats all numbers i can read on it.

MrWillys

Use that file I gave you and change the flowrate to 18 and see if it makes a difference. I went through this the other day, and I believe it to be undersized for the 305.
This site says it's 17 lbs:
http://www.users.interport.net/s/r/srweiss/tableifc.htm
I saw somewhere else that said 18

nascar2496

iTrader: (2)

Ah ok, I got them from a sponsor on this site.

I took it for a ride without any changes and what a difference that made. I will change the rate, but I cannot find it in the mask. Im assuming its under scalars.

nascar2496

iTrader: (2)

Never mind, Found it. its under single fire/double fire.

Its currently set to 19.48 @ 40psi. I have not touched it. Is that correct or should I set to 19.00?

MrWillys

First, I see things different than you, because I use Tunercat. Do you have a cable to datalog? You need to watch your blm counts. You want to see 128, but below is taking away fuel, and above is adding. Adjust flowrate until blm counts are close to 128.

I never knew the programming called out psi?

nascar2496

iTrader: (2)

Here is a screen shot of what i found. I will play with the flow rates a little and see what happens. I have moates autoprom so i can datalog and emulate etc. Overall the BLMs were adding fuel but not crazy like the prom i used. The prom i used they would spike to 150 and turn red. Ill have to create some data log files.


Thank you so much for your help so far. Very good advice.

nascar2496

iTrader: (2)

Ok so update: Tuning was going good and getting better using the MAF tables until my speedometer cable broke. The computer went into limp mode and got all pissed off.

SO I have two questions:

1. What tables do I need to adjust for limp mode?

2. what tables do I need to adjust for Open loop mode for first start?

Thank you

Tuned Performance

iTrader: (92)

You got a code 24 and went into lhm ?

nascar2496

iTrader: (2)

I am assuming that is what happened. I havent had any time to mess with it since.

When i was out with it a few weeks back i pulled up to a light I went to take off and the car just stalled. Would not restart. Finally reset the computer, reloaded the prom then it started (barely) enough to get to the shoulder. turned it off let it sit for a minute and it started up no problems and seemed to be ok. Started driving down the road (at this point i had no idea the cable was broken) then the SES light came on and it was a totally different car. Didn't want to run, the A/F was at 17-18:1 under throttle was 16:1 at best (so really lean). came to a stop sign and the car died. wouldnt restart. turned it off for a minute then it restarted and was ok until the ses light came back. This is when i noticed the speedo was not working. So LHM was the first thing i thought of because the car acted totally different then it was before.


I did get to replace the cable. Car is still unhappy for its short test drive and now there is a new noise so I think i have another problem to deal with.

So that is the back story, Does anyone know the tables?

nascar2496

iTrader: (2)

just an update here guys. I had two problems happen at the same time. 1. the speedo cable broke 2. the IAC broke, the plunger literally unscrewed itself and the spring was a mess and there was no resistance on the motor.

replaced the iac with a ac delco one and new speedo cable. Car runs fine now.

I just need to fine tune it.

Does anyone have a list of the tables and a description on what they control? Or what tables to look at when controlling fuel other than the MAF tables. Its all over at idle just not happy at the moment, especially in open loop.

Tuned Performance

iTrader: (92)

https://www.thirdgen.org/forums/diy-...uide-book.html
Im not sure what you mean its all over at idle if its surging because of a cam or a lean condition. this would be 9gps in maf table 1.

ByByC5

Not sure if this is what your looking for, but when looking at what ever parameter you have displayed in TunerPro you can get a brief description of the parameter by hitting the fn key and f10 on your keyboard and a window will pop up with a brief description of what your looking at.

HTH

Keith

greggbruce

iTrader: (1)

use this ^^^ link, but scroll down to where it says :

165:
The Definitive $32 $32b Tuning Article


I have looked and read a TON of stuff here, but never made it all the way down to this until recently -- I wish I would have found it earlier -- there is a WEALTH of info for the MAF vehicles here....

nascar2496

iTrader: (2)

Thanks for all the help. I thought that I had some major progress done the other day but when i went out to the car tonight it had the same issues. It will not idle under 1200rpms regardless of coolant temp, AFR is bouncing around and its running roughly. WOT is under load is getting about 8-9:1 AFR which is wayyy rich but that is another issue. Im thinking that I am using the wrong stock prom. ( ANYX)

Here is a video I took to show what Im talking about.

greggbruce

iTrader: (1)

I just noticed on post # 13 -- your picture shows -34.6 coolant temp --- that will really freak stuff out if the computer is really seeing that value....

Ronny

iTrader: (1)

-34dF may suggest the coolant temp sensor is defective or not connected. Why 100 rpms? is engine off key on?

RBob

iTrader: (1)

And the BLM is 4, which is impossible. I figured it was an ALDL data stream sync-up error.

RBob.

Tuned Performance

iTrader: (92)

The tps voltage and maf GPS is also a dead give away