Dave1647545494 Posted September 26, 2004 Report Share Posted September 26, 2004 Ok I converted the shadow from tbi to turbo mpfi now the trick to doing this is to wire all of the injectors together and batch fireing them with the tbi controller. the car starts right up and then dies. I have no trouble codes and everything apears to be wired properly. any ideas? I have spark and fuel it just shuts off. Quote Link to comment Share on other sites More sharing options...
copperhead Posted September 27, 2004 Report Share Posted September 27, 2004 my $.02, it seems to me like it's acting like it doesn't want to idle, but it seems like it's shutting down too fast for that to be the issue. Just trying to make the problem a bit more clear, i want to see this beast run Quote Link to comment Share on other sites More sharing options...
SlowZ06 Posted September 27, 2004 Report Share Posted September 27, 2004 Sounds like an injector resistance issue. I assume this has been done successfully in the past? I'd ohms test the injectors... Also, a TBI pump should be running 9-17 PSI, while I'm sure your MPFI setup will require 35+ PSI. I'm sure you've changed the pump and are using an appropriate regulator? (I know you know what you're doing, just offering suggestions as they come to mind.) Quote Link to comment Share on other sites More sharing options...
rl Posted September 27, 2004 Report Share Posted September 27, 2004 Sounds like a impedence problem. Did you series the injectors or parallel them? Quote Link to comment Share on other sites More sharing options...
Guest OmniSRT4 Posted September 27, 2004 Report Share Posted September 27, 2004 Originally posted by Gas, Grass, or Ass: Ok I converted the shadow from tbi to turbo mpfi now the trick to doing this is to wire all of the injectors together and batch fireing them with the tbi controller. the car starts right up and then dies. I have no trouble codes and everything apears to be wired properly. any ideas? I have spark and fuel it just shuts off. Wiring all of the injectors together and running them off the TBI circuit is *not* "the trick to doing this". First of all, the "trick" you mentioned is for the 3 people in history who decided to convert from TBI to *N/A* MPFI. You have to use low reistance 19lb/hr ford injectors. When converting to TURBO you need to use a turbo fuel pump and lines, turbo injectors, and a turbo power and logic module. (2 injector drivers, not 1, batch fired in PAIRS) Later Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted September 27, 2004 Author Report Share Posted September 27, 2004 ah I see ok I talked to the guy on aim that did it he must have forgotten to mention the injectors. I have a turbo pump and lines and stuff its making 60psi static fuel pressure at the rail drops to about 50psi during cranking. I'm trying it this way becuase to us a turbo harness and computer in a 94 I also have to rewire the dash and I'm trying to avoid that I'll try the samller injectors and see if it fires and then start looking for the rest of the wiring so I can rewire the dash to match the turbo harness I have. thanks for your help Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted September 27, 2004 Author Report Share Posted September 27, 2004 found some injectors in the garage 1st set from a 94 pontiac grand am 2.3 sohc 2nd set from a 2.3 mpi efi ford either set of injectors the ones I'm looking for? Quote Link to comment Share on other sites More sharing options...
Guest OmniSRT4 Posted September 28, 2004 Report Share Posted September 28, 2004 Originally posted by Gas, Grass, or Ass: ah I see ok I talked to the guy on aim that did it he must have forgotten to mention the injectors. I have a turbo pump and lines and stuff its making 60psi static fuel pressure at the rail drops to about 50psi during cranking. I'm trying it this way becuase to us a turbo harness and computer in a 94 I also have to rewire the dash and I'm trying to avoid that I'll try the samller injectors and see if it fires and then start looking for the rest of the wiring so I can rewire the dash to match the turbo harness I have. thanks for your help Oh man, a 94. I didnt see that in your signature. That does make things more difficult because you have SBEC2. The series method wont work for you. The 19lb/hr injectors dont flow enough for a boosted application. It wil start and run but wil be starved for fuel in boost. Ok here is what you do... Get an SBEC1 from a 2.5T or the like and run 2 SBEC's. Leave the 94 sbec in for yall of your dash controls and use the SBEC1 to control the engine functions (with appropriate turbo wiring attached). This works. Its been done in a 94 minivan. Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted September 28, 2004 Author Report Share Posted September 28, 2004 so would it be easier just to conver the dash wiring to a 90/91 sbec setup. I also have a turbo computer and harness from an 88 I don't mind rewiring the dash. I'm try to be as simple as possible. I'l look for the appropriate turbo computer though. I don't suppose you have alink or know anymore about how they piggybacked two computers together do ya? thanks Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted September 28, 2004 Author Report Share Posted September 28, 2004 19 pounders fixed it thanks again need to hook up an af meter and a boost guage and see what she does Quote Link to comment Share on other sites More sharing options...
Guest OmniSRT4 Posted September 29, 2004 Report Share Posted September 29, 2004 Originally posted by Gas, Grass, or Ass: so would it be easier just to conver the dash wiring to a 90/91 sbec setup. I also have a turbo computer and harness from an 88 I don't mind rewiring the dash. I'm try to be as simple as possible. I'l look for the appropriate turbo computer though. I don't suppose you have alink or know anymore about how they piggybacked two computers together do ya? thanks I could look it up if I was so inclined. smile.gif Quote Link to comment Share on other sites More sharing options...
Guest OmniSRT4 Posted September 29, 2004 Report Share Posted September 29, 2004 Originally posted by Gas, Grass, or Ass: 19 pounders fixed it thanks again need to hook up an af meter and a boost guage and see what she does Keep the boost low. (not much fuel in those) Stockers are 33lb/hr Quote Link to comment Share on other sites More sharing options...
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