DIY PROMDo It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.
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I entered a bin and xdf file to show values but don't I have to enter those off my prom to see what is going on with mine? I am not sure but do I have to use my pocket programmer to read my bin and xdf file to see ve tables and to change how my truck runs?
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I dataloged my truck today and seen the BLM go from 129 to 89 and then back and forth. I know that's WRONG! I don't have very much knowledge, I just need someone to tell me why or what's the next step, even just a "BUMP"!
o2 has been replaced not too long ago. I got a reading of 800mv to 300mv, not stable, also the pulse width goes from 4 to 1 ms, lower when the blm is too. It runs bad.
I was told that if you run rich too long it will take out the O2, any truth?
Yes, way rich over time will kill the o2... does it smell alot of fuel?
have you checked your injectors ? if not, please do it.
You can also Call Jon up at Fuel Injector Connection :
Phone : 770-888-1662
Email : info@fuelinjectorconnection.com
I think I am getting somewhere. I called affordable fuel injection and talked to Kevin, he told me put fuel pressure to 32psi, it idles alot better and the bad gas smell is gone.
I would like to know what the best bin and definition file to use with tunerpro rt, having HSR, cam(duration @.050 212 intake and 218 exhaust, lob sep 114), 52mm BBK throttle body, 22lb design III, stock compression. It runs allright but I know it can be better.
I would like to know what the best bin and definition file to use with tunerpro rt, having HSR, cam(duration @.050 212 intake and 218 exhaust, lob sep 114), 52mm BBK throttle body, 22lb design III, stock compression. It runs allright but I know it can be better.
What ECM are you using? What is the engine displacement?
I did sum more datalogin and then I found the blm start at 118 at idle then when I cruse and let off the gas blm goes to 90? target AFR is 14.73. I lowered the fuel pressure from 38 to 32, should I go less pressure? Kevin at affordable told me to send the prom to him and he will make sure it is correct, I have heard that you need to have the prom progamed good to begin with to fine tune the rest correctly.
32# of fuel pressure on a 22# injector would normally run on the lean side (High blm's) in a stock 350. Idle is around 1.5-2 ms, the stock program will not let the injectors run under 1.59 ms, unless in decel. Something is not correct as RBob said.
I am dataloging my own vehicle, I don't know why I am getting from 118 to 90 blm, I thought I may have to reburn the prom to fix my problem but if you are saying it should be right then what would the problem be? The prom came from affordable fuel injection and I have heard there have been problems with their proms. any thoughts?
I looked through the datalog again and put the o2 on the monitor and it just goes BALISTIC! Starts pretty stable then looks like scribble the rest of the time over 800mv shows red, not good, I will start there.
A BLM of 128 is making no fuel corrections. Less then 128 is removing fuel, greater then 128 is adding fuel.
Generally the BLMs will move some. A range of say 122 through 134 is decent.
Since you are tuning it yourself, the best bet is to start with a stock BIN. Probably AUJP. Set the fuel pressure vac line off to 43.5 psi.
Then start it and warm up the engine. Data log and drive around. Note that at low RPM the BLMs will be low (removing fuel). This is due to the cam (non-stock). From the data log adjust the VE tables to bring the BLMs back to 128. Will need to drive, data log & adjust the VE tables several to a handful of times.
Note that the O2 sensor WILL oscillate between high & low while in closed loop. This is normal.
[quote=pandin;3820760]32# of fuel pressure on a 22# injector would normally run on the lean side (High blm's) in a stock 350. Idle is around 1.5-2 ms, the stock program will not let the injectors run under 1.59 ms, unless in decel. Something is not correct as RBob said.[/quote
[quote=pandin;3820760]32# of fuel pressure on a 22# injector would normally run on the lean side (High blm's) in a stock 350. Idle is around 1.5-2 ms, the stock program will not let the injectors run under 1.59 ms, unless in decel. Something is not correct as RBob said.[/quote The data log says RICH and that's why I thought low blm was rich. I only have a pocket programmer 2 and I am waiting for my adapter so I don't have to desolder it, then I can tool with it. I guess I will set the fuel pressure back to 38 at idle with vacuum connected.
The data log stating rich is for that particular period in time. When in closed loop the rich/lean flag should be toggling back & forth. A low BLM is from the non-corrected AFR being rich. A low BLM is removing fuel to lean the mix.
The fuel pressure should be set with the vacuum line off and plugged. Factory spec for a TPI system is 41 to 47 psi (vac line off!). Nominal being 43.5 psi.
If you've got a way to document what is on your BIN, you may waht to compare it to one of the other known BIN's for similar tunes. It would be useful to see what they changed - if anything given your engine - to reflect the custom tunes that they do.
I bought a bare-bones kit from AFI to convert my 340 to EFI, and the tune that they gave me was basically a stone stock Corvette BIN. It was literally undriveable with my combo, so I started tuning on my own. I'm not real happy about that, since part of what I paid for was a tune that would work with my particular combo. I cut them some slack on that because there were a lot of big things going on with the guys running the shop at the time, and they were great to work with from a support standpoint.
Make sure of what you're starting with before you try to make changes...
After talking to AFI, they agreed to reprogram to prom to help it run better, STILL says set fuel pressure to 32, if it is still NOT right the pressure goes up. I will still copy the bin to see what's on it, compare it to other bins. I need the expereance.
Another question, I am having my prom reprogramed and would like to know if I should have just a heated o2 or a wide band o2. But what are the differences and what would be best?
The WB is a heated O2 sensor just like the NB, in fact every WB has a NB included to reference the fuel. The only trouble is the WB's NB is not usable as just a NB output. NB is o mv lean and .9 mv is rich. WB is 0 v to 5 Volts output.
I got the prom back from AFI, put in a heated o2, It runs better but STILL hitting 90 blm, ALOT less than before. It idles rough, the idle is set at 700 and I have the fuel pressure at 40. I am waiting on a G1 pack and HDR1 to look at the program, I NEED to find out what's up. If you have any input I will be greatfull!
I got the GP1 pack, HDR1 from moates, I am using pocket programmer 2, haveing a problem copying the prom so I can burn it to another chip from moates, I have the prom 27C256 and moates chip is C2SST27SF512, would like to know the process, thanks
I think my problem is the program from AFI, I was able to retreive the info off my prom and compare it to others and it is NOT even close to anything. I used the graph, pretty cool, I am learning so please don't think I am . So I still need info or a site to go to find out more about the pocket programmer 2. thank you for your help !
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. So I still need info or a site to go to find out more about the pocket programmer 2. thank you for your help
