98cobra+75280z Posted April 15, 2012 Share Posted April 15, 2012 I just finished installing some 440cc injectors, i believe they are high impedance but am not totally sure. I measured them with an ohm meter and they are all around 9 to 10 ohms. This is much higher then 2-3 for low impedance but i keep reading that high Z will be around 12 ohms. My biggest question is do I need to reinstall my resistor pack or should these injectors be ok. Also is there any way the new injectors could be causing resets to occur. I drove my car back to school today ( around a 2.5 to 3 hour drive) and the car drove great the hole way until the last leg of the trip. Then the car started bucking every once and a while, like the feeling the car has when i burn something to the computer while driving. I opened up the MS and nothing seemed to be hot or smell burnt. BTW the car is a 77 with an 82 l28et running MS1 v2.2 and a HEI 4 Thanks for your help. Quote Link to comment Share on other sites More sharing options...
bthomp Posted April 15, 2012 Share Posted April 15, 2012 What reading did you get, and where did you get the injectors from? Quote Link to comment Share on other sites More sharing options...
98cobra+75280z Posted April 15, 2012 Author Share Posted April 15, 2012 What reading did you get, and where did you get the injectors from? all six measured between 9 and 10 ohms each, they are from Venom. Quote Link to comment Share on other sites More sharing options...
bthomp Posted April 15, 2012 Share Posted April 15, 2012 According to their website, they are high impedance. So you could reinstall the pack, or change the setting in MS. But as I'm sure other people will say, even if you reinstall the resistors, you will prob still have to play around with your setting anyways. As far as resets, your going to have to wait for someone else to answer that. Good luck though. I'm away at school about 2 1/2 hrs and am having problems as well. Funny how nothing is wrong when you have all your tools around, but as soon as you leave everything goes wrong that could. Quote Link to comment Share on other sites More sharing options...
dexter72 Posted April 15, 2012 Share Posted April 15, 2012 Yes you need to change your settings for the High impedence injectors, then you may have to calculate required fuel again and your VE Table. If the injectors are the same size as your old ones and you just changed from low impedence, to High impedence, You might be ok. Quote Link to comment Share on other sites More sharing options...
98cobra+75280z Posted April 15, 2012 Author Share Posted April 15, 2012 It would make to much sence for the car to act up around tools. lol What settings will change for high Z injectors compared to low Z with resistors? I have PWM current to 100% and PWM time set to 25.5 ms. Is that needing modification. Thanks again guys Quote Link to comment Share on other sites More sharing options...
bthomp Posted April 16, 2012 Share Posted April 16, 2012 I'd start at 75% and work up from there so you don't burn out the injectors. And for the other numbers, you might want to do some research about them to see what numbers you should be pluging in. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.