1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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Just seems easier to re-pin that on the bench then to re-pin the harness hanging under the dash.
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
This is my first attempt at a re-pinning. I created this "map" to hopefully make things easy and understandable. Also attached are the 3 diagrams I used for reference. There are a couple spots that have "?" I wasn't sure what do do with those. I could not find a match up.
I also assumed I would have to add the fan control circuit and the A/C pressure switch circuit.
the 7730 ECM wants a knock sensor wire but I dont have one or at least cant find it in the 7747 diagram
Pass fail close?
ecm-repin-map-page-001.jpg
Reference material
7747 ecm pinout.jpg 7747 ecm pinout 2.jpg 7730 ecm pinout.JPG
Last edited by pma4x4; 07-11-2014 at 12:49 AM.
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
The knock sensor is B7 "est retard"
The knock sensor does not connect directly to a 7747. They use a external knock filter. Usally bolted on a plate on the intake next to the map sensor. That module will need to be removed and bypassed. It has 4 wires, power, ground, knock sensor, and then ouput to the ecm. You can remove the module, remove the ground and power wires for it from the harness, then where the module was, connect the knock sensor wire to the wire going to the ecm, as mentioned above, its pin B7 on the 7747, then that wire will go to the 7730 knock sensor input F9. The crank signal wire (pin C9 on the 7747) is not used on the 7730. So it can be taped up and tucked away. You will also have to run some wires for the IAT sensor, since there was never one on the 7747.
79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy
93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver
99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.
I have been wondering what that thing was next to the TBI. SO bypass that buy connecting the wire from the knock sensor to the wire going from the knock filter to the ECM. cap off the rest.
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
Anyone have any views on these others
B2 to b13
c12 - ?
which fuel injector ctrl runs which bank?
on the 7730 I dont know where these are on the 7747
B5 is TPS and MAT ground
B6 is MAP (not using) and CTS ground.
and the 5v reference on the 7747 C14
C14 to A4/A5??
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
Pin B2 on the 7747 would go to pin E13 on the 7730
I assume your talking about pin C12 on the 7730?
C11 is injectors 1,3,5,7
C12 is injectors 2,4,6,8
A11 is the sensor ground on the 7747. The map, tps, and cts ground on that pin.
The 7747 powers the map and tps with the same pin (C14). The 7730 just used seperate wires. You can simply connect the 7747 wire C14 to either A4 or A5 on the 7730. Wont really matter.
79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy
93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver
99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.
I don't look at the site for a month or so and this is what I miss?!?! Neato thread.
94 Blazer, Turbo'd 350 TBI - DD
1991 2500 Suburban Adventure truck - 4wd conversion, 4-link F/R, 582ci CNP Big Block with Terminator X EFI backed by a 6L90 and twin stick'd NP205 t-case
2012 Porsche Panamera Turbo - Date night car :)
1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac
I want to thank Jeepsandguns for letting me have the 7730 ECM at a great price. One step closer.
engine-008.jpg engine-009.jpg
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
I got a whole pile of TPI stuff I am selling over in the classifieds section. These are the parts I accumulated while figuring out this motor project.
http://www.gearhead-efi.com/Fuel-Inj...2306#post42306
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
So it's been a while since I've been here. The project is pretty much on hold until tax refund time. I am slowly trying to acquire what I can when I can. The block is done I just need to get the new pistons to them so they can check decking. I just ordered 24Lb blue top injectors (jumped on those since they were on sale). I am hoping to order som emore stuff here soon. We took the truck for a cross country trip to Minnesota in September. it did great but I think it would have done awesome with the TPI setup.
Ive been going thru the build list and I am trying to finalize the list.
Current: '91 1500 Suburban (3rd owner), 350 TBI, 700R4
TBI system: RV Morse Bored TB - Matched FIs - Adjust. fuel psi regulator - Injector pod spacer - RV Morse Powerplate - Hypertech "salad bowl"
Full write-up here
Follow the build here
I just ran across this thread and seen that your engine build mirrors what I plan for the engine swap for my 86 Caprice Landau. I have subscribed as I want to see how it turns out. I will not hijack your thread but just wanted to wish you good luck. Should be a great running engine.
Hello pma4x4,
I just finished reading this thread, and have made a TPI swap myself in my 93 K1500 a while back. The torque increase over the TBI was amazing. I put The TPI system ontop of a 383 build with a Comp Cam designed for the TPI system for fuel mileage and low rpm torque. My highway mileage is amazing for a 4x4 truck on flat roads I get about 22 mpg @ 65-70 mph. Reading through TunerPro RT data logging.
I used 24 lb. injectors as well, and have a couple suggestions that will aid in getting your set up tuned properly.
1- Be sure and get the specifications on those injectors, specifically flow rate vs fuel pressure.
2- The voltage offsets for injector lag time specific to the injectors you bought.
3- Get an adjustable fuel pressure regulator. To be able to fine tune your fuel pressure.
Keep in mind that stock TPI runners and lower manifold will not flow much above 4500 rpm. So keep this in mind when buying a cam. Not sure if you have bought that yet.
Good Luck!!
Keith
NE Tennessee
04 Lightning Pullies n Tune CAI
96 Formula WS-6 m6 383 LE3-Heads/GM847/N2O/ Ford 9" 4:33/Sus Work/Stickies/TunerProRT
93 K1500 383 LT1 with Low RPM 4x4 torque cam
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