Are loud injectors an issue

bleoh · Post by **bleoh** » Sat Feb 18, 2006 7:05 pm

Compared to OEM systmes my injectors are very loud. The make a clicking noise when running. Should I look for a setting in MegaTune that might be off or is it nothing to worry about? Thanks. Brian

Big Creek · Post by **Big Creek** » Sat Feb 18, 2006 9:08 pm

I would assume you have your PWM set correctly. If so you probably have nothing to worry about. Some injectors make more noise than others.

I have had three setups on my car. First 4 low-Z with PWM = Very quiet then same injectors with resistors and no PWM = Very loud! Then I went to high-Z injectors and they fall in the middle. Not real loud but not quiet either.

Todd

fscott · Post by **fscott** » Sat Feb 18, 2006 11:59 pm

I was told once that if they're not clicking, they're not working.
New injectors are pretty quiet, but before long, they click. If old injectors don't click, they may be gummed up and need cleaning.

bleoh · Post by **bleoh** » Sun Feb 19, 2006 3:37 pm

Thanks. I think I have my PWM set up correctly (looks fairly straight forward for high z injectors). I did have my injectors tested and cleaned by one of those services, so I think they are good. I won't worry about it.

Brian.

jonfx4com · Post by **jonfx4com** » Mon Feb 20, 2006 3:09 pm

my weber marelli injectors are loud, so loud I spent an hour adjusting the valve clearances before I realised it was not the problem! I found that going from 1 squirt to 4 squirts helped a lot, became a buzz not clicks if yoe see what I mean.

Jon

bleoh · Post by **bleoh** » Mon Feb 20, 2006 6:40 pm

I know what you mean. I checked my oil thinking it was low.

hudsonhawk · Post by **hudsonhawk** » Tue Feb 21, 2006 8:05 am

I am running 2 Holley low-z injectors in a GM TBI. They click audibly and have since new.

HVviceP · Post by **HVviceP** » Tue Feb 21, 2006 4:18 pm

Just be sure it is in fact the injectors that are loud. Use the screwdriver to ear trick or get the cheap automotive stethoscope, it works really well.

My buddy installed a new set of disc injectors and a batch fire EFI in his car at the same time. It sounded like a diesel but he wrote it off as the mammoth injectors all letting go at once and was proud of it. Turned out 70 miles later that it was the valves bouncing off of his pistons (had also just put in a new oil pump so he had a lil more lift, at least thats all we can come up with) End of a valve/head/piston/rod/block while cruising at 1700rpm...

jonfx4com · Post by **jonfx4com** » Fri Feb 24, 2006 1:50 pm

This has me thinking. I listened to a DOHC ford engine today runs the same injectors I have and they dont click, at least not close to the same loudness. Is it possible that OEMs are ramping the open signal to prevent it. Seems unlikely I know, just thinking out loud. I cant ever recall hearing an OE engine making the same noise.

Jon