installed some LI injectors on my s5 and car wont rev past 3800
 

put in some 10 ohm 10 watt resisitors ( put 1 on the light green and red wire and the othere on the light green and yellow wire, is this right?)on the ecu side and some marren LI injectors , my question is how do i check to see if these resistors are doing there job and how i can check that the injectors are getting the correct power to come on at 3800? i searched and couldnt really find a answer

thanx for any help

I am having a similar problem to you. I just installed greddy LI 720s in my secondaries and the car just severely bogs and hesitates above 4k rpm. Kevin Landers said that there is way too much fuel and I need to get an SAFC to tune them down. Right now there is 30% more fuel. Way too much for my mods.

yeah.. i think if you guys would put a wideband on your cars, it would be in the single digits when the secondaries come on.

LI? Low Impedence? s5 uses high impedence

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Yes, but most upgraded injectors are low impedence so a 10ohm/10watt resistor per injector. LI injectors are supposed to react better/faster than HI impedence. Do a search for some more info.

i have a plx wideband and a s-afc have the safc turned way down, how do i make sure they are coming on at 3800? and that these resistors are droping the ohms?

Not sure how you can test that they are coming on at 3800. You can test the resistance of the wires you adding resistors on. Waynne88N/A was nice enough to tell me how

You guys should spend time with a voltmeter/ohmmeter and learn the basics of electronics. It's all really pretty simple, it's just wires, voltages and resistances. You can troubleshoot damn near anything on the car with a multimeter (and the knowledge of which terminals to probe, how circuits work, etc.). I'm no electronics genius, but I know enough to get by.

These cars are RIDDLED with electrical gremlins, and you need to learn how to do basic troubleshooting, so that you don't have to post here every time you have a little issue. True, thats what this board is here for, but there is something to be said for teaching yourself the basics. How do you think I got where I am today...at age 19 I knew little more than how to change sparkplugs and oil. I'm now almost 27 and am a nationwide supplier of rotary engines and technical support for some of the more complex automobiles on the road. And nobody taught me any of it.

High impednce injectors are actually quicker.
The low impedance ones are better suited to high CC's.

I forget exactly why but there is a thread which explains impedancees on injectors.

You guys should see my thread on the injectors not working.

Easiest way to check for working injectors is to check for voltage and voltage drops at the pins for those injectors.

Turns out I had messed up on a connection when installing resistors to my harness. It wasn't getting continuity.

720's without a SAFC will be a killer.

ANother possibility is that the FPR could be dead.
That's what seems to be going on with mine right now.