What efi system is best for a 4.5 pfi cadillac engine7

[dave w]

I like the 16197427 for OBD1 MPFI. The 16197427 is well supported, affordable, and easily converted to MPFI. I would use the Ostrich 2.0 and Moates.net G1 Adapter.

dave w

[S.O.B.B.]

Thanks for the fast reply.I do have a 7427 bjxk from a 95 c1500 that had 305ci and auto .I took ecm and connectors and vss buffer from that truck.I read about jumping the 2 sense resistors to enable batch fire for 8 injectors.I did this mod to the ecm.I have ford crown vic injectors in it and ready.but I don't yet have tuning ability so I didn't swap pcm yet.still running tbi.I also have to change f/p for the swap.if I did the swap with out tune capabilities I know it won't see a transmission plugged in so it will have trouble codes. Unsure if that puts into limp or prevent closed loop.not new to it all but I still have a lot of learning for the tuning stuff and how to use the programs.if anyone on here is willing to burn a chip and ship I could provide what info I do have for both set ups.stock chip or 28 pin.I live in canada and I don't have much in the way of support here aa most places have no info or product for the older ecm.thanks

[dave w]

Attached is 16197427 MPFI Information.

Maybe converting the 2.8 TBI system to the 16197427 TBI is a GOOD first step?

My post for tuning the 16197427 with a Wide Band Oxygen Sensor (WBO2): http://www.gearhead-efi.com/Fuel-Inj...g)-Spreadsheet
Post 25 has the latest spreadsheet. Post 26 has some useful screen shot for "Tuning" using WBO2 data.

It's always challenging using parts from vehicles that are +20 years old in a project.

dave w

[S.O.B.B.]

Thank you Dave w.the tbi I'm using is from the 305 engine.I put 4.3 I Hector in it as the 305 was so rich u could see and smell it out the exhaust. The harness and est and knock sensor is the only 2.8 part left on the truck.all else is from 305.I originally tried a distributor that I made from a cadillac bottom and small cap chevy top but the rotor phase was not right.after multiple tries I got it so it was firing at the right time with a hole drilled in a cap to see.but still unsatisfied I swapped to the oe cadillac large cap hei.but from what I understand the ecm wants zero and the cadillac calls for 10.I have it set now at 14 and it runs well enough to get me to work but not that great.I swapped a heated o2 in as well.couple questions. I have not been able to find the bin for my 7747 asdm or for the 7427 bjxk.is that because of us and canadian difference or are these odd balls.I just used a different bin to log.on the 7427 will it run the engine fine with no Tran plugged in or is changing settinga and burning to a chip required the ecm to not be in a limp or open loop mode.thanks for the helpful info.sorry about any spelling errors.all I have been using is my phone to post.

[S.O.B.B.]

Anyone try removing the stock 28 pin chip from memcal and solder in a socket.will that work as an alternative to the g1 adapter.20171127_094140.jpg

[S.O.B.B.]

Hello Dave w.can u please tell me if it's ok to put a chip socket in place of the chip on a stock memcal to change chips that way as apposed to buying a g1 adapter. Will it function just the same. Here is a pic.you seem to be a very knowledgeable person and your advice is very much appreciated.someone that knows their ������ sure makes things easier for the inexperienced to understand and accomplish. 20171127_192031.jpg20171127_192144.jpg

[dave w]

If you have excellent soldering skills and equipment, installing a 28 Pin DIP Socket into the Memcal is a low cost alternative to the Moates.net G1 adapter.

dave w

[S.O.B.B.]

Awesome.thanks.that was a memcal from another ecm I had for a quad 4. Looks same as 7427 so that was my practice run.that will shave a bit off of getting into tuning for me.I priced a gqx4 and 2 sst27sf512 chips.about $170. Canadian delivered so that's not too bad.would have gotten burn 2 but it's a bit more money so as u can see I like to make it cheap.thanks for the confirmation.have a great day

[stew86MCSS396]

I've done that before but I didn't have a fine tip soldering iron so needless to say, mine didn't come out as pretty as the one you have in the pics. Just to pretty it up, I think I'll pull out the dremel an clean up the melted plastic!!! BTW...I also used a zif.

[S.O.B.B.]

Re:mpfi information zip
How do I use these.through tunerpro?is this code to copy to ?sorry.I'm still too green to know.I suck at this kind of stuff on a computer because I've never used any of it b4.

[dave w]

Re:mpfi information zip
How do I use these.through tunerpro?is this code to copy to ?sorry.I'm still too green to know.I suck at this kind of stuff on a computer because I've never used any of it b4.

Ok, first things first ... please post the .bin file you have modified for MPFI.

dave w

[S.O.B.B.]

I don't have one of those.I won't be getting a wb o2 any time soon but the info is good for future reference. The 7427 (bjxk)I have is stock accept the jumpers soldered onto sense resistors.I'm unclear on what would need to be done to enable mpfi programming wise.and disabling transmission control.also still pretty unclear on tunerpro of what's what and in the parameter tree what things u could or would adjust and what u shouldn't touch.scalers.flags.tables.I don't know how to use or what an Excell spread sheet is.I am currently running 7747 asdm and have a few logs.I haven't figured out how to post one yet.sorry.I got alot to learn don't I. I've just been looking at the tunerpro and reading the tutorials from sixshooter. I hadn't planned to swap to 7427 till I understand how to use the features in tunerpro.I'll keep reading

[dave w]

https://ls1tech.com/forums/lt1-lt4-m...-tutorial.html

dave w

[S.O.B.B.]

Using a 7427 bjyb bin in flags if I flag manual transmission does that alone disabled the transmission controls or do other items need to be changed as well.

[dave w]

To view parameter comments and tips, use the F10 key after opening a parameter. For example open Manual Transmission and press the F10 key.

See example below.

After setting manual transmission and related parameters from the "Comments", I would also disable the automatic transmission codes.

dave w