Jacob Ochs Posted March 19, 2015 Share Posted March 19, 2015 So here were my plans put a 5.0 in the jeep, well things didn't work out, yada yada yada. And after a lot of time to think the 3.4 route is my best option to replace the 2.8! So in 2 weeks I'm heading to a friends to pick up a 3.4 out of a 94 firebird! I am planning on keeping the SFI an ditching the carb and really need to know how I can make the fuel injection work! I've been searching all over and can not find it! Also I would like to know anything I need to pull from the car to keep the Fuel injection and where it's located! As always thanks!:) Link to comment Share on other sites More sharing options...
shelbyluvv Posted March 19, 2015 Share Posted March 19, 2015 Are you sure it is SFI and not TBI? EDIT: after checking the internet I see they are SFI. I have never done a full on SFI swap but I am pretty good with fuel injection in general. At a minimum you will need the wiring, ECU, fuel pump and the complete engine. I would also buy the correct FSMs for both vehicles. More than likely you will have to re-pin your bulkhead connector to run the fuel pump and computer. I would toss the SFI and go TBI. Link to comment Share on other sites More sharing options...
Jacob Ochs Posted March 19, 2015 Author Share Posted March 19, 2015 Are you sure it is SFI and not TBI? EDIT: after checking the internet I see they are SFI. I have never done a full on SFI swap but I am pretty good with fuel injection in general. At a minimum you will need the wiring, ECU, fuel pump and the complete engine. I would also buy the correct FSMs for both vehicles. More than likely you will have to re-pin your bulkhead connector to run the fuel pump and computer. I would toss the SFI and go TBI. what exactly is TBI? And how could I run it?? Link to comment Share on other sites More sharing options...
shelbyluvv Posted March 19, 2015 Share Posted March 19, 2015 Throttle Body Injection. The TBI is a basic FI setup. It is OBD-I and is a very simple design. I did a TBI swap on a CJ using a Howell kit and it was easy as hell. The Howell kit is basically off the shelf GM parts using a PROM burnt by them. I know the 2.8 came factory with the TBI setup on S-10s. It would be much easier to swap in a OBD-I TBI setup over a SFI. The SFI is really complicated and will require a lot of tuning of the PROMs to get it right. Link to comment Share on other sites More sharing options...
Incommando Posted March 19, 2015 Share Posted March 19, 2015 It uses what looks like a high-tech carb in the usual carb location. It has one or more injectors in the throttle body itself so that the air & fuel enter the intake at the same time just like a carb. There are not separate injectors at each cylinder. Link to comment Share on other sites More sharing options...
Jacob Ochs Posted March 20, 2015 Author Share Posted March 20, 2015 Throttle Body Injection. The TBI is a basic FI setup. It is OBD-I and is a very simple design. I did a TBI swap on a CJ using a Howell kit and it was easy as hell. The Howell kit is basically off the shelf GM parts using a PROM burnt by them. I know the 2.8 came factory with the TBI setup on S-10s. It would be much easier to swap in a OBD-I TBI setup over a SFI. The SFI is really complicated and will require a lot of tuning of the PROMs to get it right. It uses what looks like a high-tech carb in the usual carb location. It has one or more injectors in the throttle body itself so that the air & fuel enter the intake at the same time just like a carb. There are not separate injectors at each cylinder. okay, so how would I wore this up? Link to comment Share on other sites More sharing options...
mnkyboy Posted March 20, 2015 Share Posted March 20, 2015 It is very common to swap gm TBI engines into rigs they don't belong in. There are many detailed write ups floating around the web,most people are swapping 4.3ls and V8s but most of the info should apply to your swap. Link to comment Share on other sites More sharing options...
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