89 4.0 l high performance fuel injectors

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Apr 15, 2014 | 09:50 PM
  #1  
Hey techs, I'm in the market for some good injectors any suggestions!

I have a cold air intake and a new header with a magna flow cat and flow master muffler.

Electronic fuel pump my need to be increased. Any comments?
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Apr 15, 2014 | 10:52 PM
  #2  
The ECU on our '89s are sealed so installing "performance" injectors and high-flow fuel pumps is, unfortunately, pointless. You can't map anything with the ECU (timing, air fuel ratios, etc.) so the best you can hope to do is upgrade to the 703 or 746 injectors and be happy with the reliability they offer and the fact that they won't crack and spew raw fuel all over your hot exhaust manifold as the stockers are prone to do. Some claim a slight improvement in throttle response and/or fuel economy but I have noticed neither. The only thing I've noticed is that my engine bay no longer smells like gasoline.
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Apr 15, 2014 | 11:01 PM
  #3  
Ok thanks for the info.
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