Below is pretty much the entire list of components I had to source both new and used for installation of the TBI system. The Wide Band O2 sensor, Maxtow fuel pressure gauge and some of the programming hardware wasn't totally necessary but made tuning and troubleshooting a lot easier. I chose to use external fuel pumps instead of adding an intank pump mainly because dropping the fuel tank on one of these motorhomes is a royal pain. Me being the lazy type that I am I opted for easy access for future replacement while sitting on the side of the road
Electronic components:
PCM 16197427 (used)
Memcal 16248378 BYYC (for 1994 P30 7.4L with 4L80e)
DRAC/VSSB module (used)
Spark controlled distributor (AM-11978505)
Coil (ACDelco Ignition Coil D535 1115315)
Coil bracket (used)
Programming & Tuning support fee (performed by Old School EFI)
Sensors and ancillary components:
O2 sensor weld in bungs (2)
O2 sensor, narrow band (AFS74 O2 narrow band sensor)
O2 sensor, Wide Band (AEM 30-4110 Wideband O2 UEGO Controller Gauge)
Coolant sensor (Standard Products TX3)
MAP sensor (Standard Products AS5)
Map sensor mounting clip (used)
Oil pressure sending unit (ACDelco 19244500)
Fuel pressure gauge & transducer (MaxTow 100 PSI MT-DV11)
Programming & Logging components (supplied by Moates.net):
ODB to ALDL cable / USB
G1 Memory Adapter: TPI ETC.
BURN2 Chip Programmer'
S4 Aries 28-pin Low-Profile ZIF
C2 SST 27SF512 Chip
HDR1 Memcal Header
License fee for TunerPro RT programming/logging software
Wiring components:
TBI Harness (Fuel Injection Connection TBI/4L80e harness - 2433-3042-N, additional length in main bundle)
Coil to distributor cable
Red dash light for engine warning indicator
Fuel Feed System components:
2" GM throttle body (rebuilt)
Aluminum flat bar 3/4" x 8" x 8" - alloy 6061-T6 (used for TBI adapter plate)
Low pressure fuel filter (AC Delco - cartridge type - GF62P)
Low pressure fuel pump (Carter P4070)
High pressure fuel filter (WIX 33033)
High pressure fuel pump (Airtex E2000 fuel pump)
E2000 fuel pump mounting clamp
Surge tank
Surge tank fittings
Fuel pump block off plate
Fuel injection hose clamps 5/16" & 3/8"
Fuel pump relay (for low pressure pump)
Misc hose and tubing fittings
I purchased the TBI harness from
Fuel Injection Connection because they apparently are the only supplier of an aftermarket harness that has the cabling & connectors built in to control the 4L80e transmission.
One thing to keep in mind is I have only run this engine on a test stand so for obvious reasons I can't say just how well it will perform until I'm able to drive it. I will say however that engine response on the test stand has been great. It starts right up at the turn of the key, idles at about 700 rpm and runs cool. In fact it runs so cool I've been having problems in testing the cooling fan controls that were added to the code. When I had it running with the Edelbrock carburetor it ran hotter so I was somewhat surprised that it ran cooler with the TBI installed. I'm not complaining, just surprised!
Brad