Just two different manufactures. I've seen 3 and 4 wire with both type slots.
Just two different manufactures. I've seen 3 and 4 wire with both type slots.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
I got type 3, it seams to work pretty good with my 288 ecm not had time to play with my 747 for awhile. zedrated did you get your o2 hooked up?
Originally Posted by ony
I got type 3, it seams to work pretty good with my 288 ecm not had time to play with my 747 for awhile. zedrated did you get your o2 hooked up?
Still haven't had time to hook it up. Now with winter coming I'm not sure if I will get a chance. Hopefully tomorrow if the weather is ok.
Finally it isn't suppose to rain this Saturday for the first time in 3 weeks. I'm going to try to get the car out for one last time before winter and hook up that heated O2 and see what happens.
So I finally installed the heated O2. Seems to run a lot less lean on idle and sometimes hangs near 14.7 but then at times bounces between 14.9 and 16. Usually closer to 15.7-15.9.
The heated O2 seems to have helped the issue but maybe now after tuning I can get it to idle near stoich with the heated O2.
any comments?
I don't have a wide ban tunner,the low rpm on my 7747 ecm for blm"s is 800 rpm.my vehichle idels at 575 never thought about it tell yesterday I don't know if the blms would change the afr with out lowering the low rpm for blm in the bin file?
Depending on how the Wide Band was programmed you could be anywhere from 14.1 to 14.7 for Stoich, then you have the fuel... it could be 14.1 or 14.7.
The WB is not an AFR gauge, it's a Lambda gauge and then converted to AFR because that is what humans wanted. Big mistake. Lambda will always be 1.0 at Stoich and does not care what fuel is being used.
Then there's the 5 volt spread usually used to measure either Lambda or AFR. These old ECM/EFI systems are no where near fast enough to keep a steady Lambda/AFR and they bounce all over driving you nuts.
The WB is also sampling so fast it could be picking up samples from 4 cylinders or four cylinders twice?
Couple things that will help you use the WB as a good tuning tool are: 1. turn down sampling rate to slower. 2. Use Lambda at a 1.0 volt scale and the math for fueling changes in VE or MAF are already done for you in the Lambda reading.
1.0 = Stoich, lower then 1.0, like .98 is rich of Stoich so mulitply by that number. Higher then 1.0 like 1.02 is lean of Stoich, so again mulitply by Lambda reading.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
The gauge I have is an AEM and I believe it can be used as a lambda gauge and has changeable plates. Either way I believe that the heated O2 definitely worked as it is not going max lean anymore on idle and usually stays around 14.7-16:1. Because these computers are so slow I believe that's why a lot of the guys I talked to including my tuner like disabling the O2 sensor. I don't want to do all the extra work to upgrade the system to a modern computer and coil on plug system as I don't drive the car much. I'm sure I should be able to get a decent tune on the car with these new injectors and even if I had to disable the O2 in the end then so be it. I put in my prom from my old 87 Camaro with a 5litre TPI and a 5speed and the car does act better in the sense that the RPM's don't drop so fast when I push the clutch down.
Maybe I will have my tuner build off that bin as I cannot find a $6E bin that seems to work well when the car is cold. Not even PCM'sforless could have got it to work. Maybe I should just stick to a $32 mask and build from there.
Anyways the car is put away now for winter and won't be out till spring time :-(
no more fun :-(
Last edited by ZEDRATED; 11-20-2013 at 01:37 AM.
maybe you should convert to MAP over winter .the last one i did for tpi 350 i made up in my head and the guy all accross the other side of the world burnt to eprm and was driving around straight away.he didnt have to change much to fine tune it
I've never researched this theory but... I don't think the MAF from that era were very good? Surely not what they are today!
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
I agree but I am sure I should be able to get a decent tune done with the MAF setup.
Anyone on here have a moates emulator that they would wanna sell?
with the map code is use on the 808/165 ecu you can tune up the aldl with your normal 8192baud aldl cable if its and ftdi chip you buy these http://pcmhacking.net/forums/viewtopic.php?f=14&t=167 or can mount your own nvram into a memcal if you can use a soldering iron
Does that work with other then $12P? Which would be a better option as well over the $6E...
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
you could make it work if you add Mode 11 - 8 Byte Write Mode 12 - 128 Byte Write and Mode 13 - 128 Byte Read into the code you want to use and get ant on our forum to add support in the plugin for tunerpro.but plug and play with non $12p no. on a maf setup 165 its as easy as using the defunct maf wires to connect to the map sensor and swapping them at the ecu end to the correct pin locations.
I hate maf with a passion so i convert most cars to this and if doing carb to efi conversion its my goto code.the boys have run 2 cylinder motorbike engines to twin turbo v8's on it.its like fitting an aftermarket ecu just easy LOL
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