I searched the forum but can't seem to find an answer as to what the stock fuel injector resistances should be. I read one thread that listed injector size and said they should be about 13 ohms. Is this correct? If so then would the fact that my primary injectors read 11.3-11.5 and my secondaries read 14.3-14.5 cause problems?

 

As long as they open when u apply 12V i would not worry.

Greets
Thomas

 

https://www.rx8club.com/series-i-tec...2/#post2543822

 

I checked that. I was unsure of whether or not the stated 13.8 resistance was just for secondaries or for all. Either way I will be replacing at least the primaries because something internally is wrong. On wednesday they measured 11.3 on saturday they measured 14.1. Whereas the secondaries read 14.3 both days.

 

I have a set in my garage.
I will go out in check those ones to compare.

 

I definitely appreciate it. Thank you.

 

So ... i measured a complete set of injectors wich were cleaned, got all filters and seals replaced and flow tested. All were slightly dripping before and had a not so nice spray pattern... they worked perfect afterwards.

All the injectors measurerd around 13,8 Ohms ... see pic here --> http://rx-8.weebly.com/uploads/3/9/7...29591_orig.jpg


If u get inconsistent measures clean all the connectors on the injectors. Make sure you measure them at the same temperature. Then after connecting give them some time to stabilize the reading...

 

If they read 11.3 consistently one day and 13.9 the next, would you replace them? Temperature was roughly the same.

 

Hmm .. did u measure it with the same multimeter with same clamps and so on?

Maybe u clean the contacts and re-measure with a bit of time ... my multimeter takes 30 seconds to stabilize ... its not a good one of course but i have consistent readings with it.


...that said. Get them bench tested and cleaned somewhere near you .. its not expensive and you can make sure they are working fine.

Its around 24€ per injector around here for cleaning, replacing filters and rubber gromments and seals and flow benching/spray pattern analysis.
Don't know how much that is over there but im sure thats a good thing for a long lasting, healthy engine.


Greetings
Thomas

 

Sorry for the delay
I left the batteries in my multi-meter and they leaked out not a good result.

Two red primaries 13.7 and 14 ohms
Yellows 13.6, 13.7, 13.6, 13.8

 

I think I'm going to play it safe and replace the 2 primaries. Since the secondaries read the same both times I tested they should be ok. I'm just worried about the fact that the primaries read 11.3 one day and 13.9 2 days later.