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Injector Pulse

tomtom123

tomtom123

New member
Just wondering what Injector Pulse Width should be when at idle?
Mine is between 2.6 and 3.2 at idle and I was told this is a bit high, like double what it should be. And my stock injectors go upward of 17 - 18ms of pulse width at WOT depending on the situation. They are usually around 16.6 - 18 for the most part at WOT. This is on stock injectors from my 99 GTP and a 3.4" pulley. I was told this is rather high as well.
I sea foamed the vacuum lines and have no leaks, and I also sea foamed the gas tank. Half a can in vacuum lines, half a can in gas tank.
 


Sounds fine to me on both accounts.

I just looked at log I did a long whiel back and in gear at idle was 2.7ish. WOT can reach 16-18 on stock injectors, once you are pushing 19-20 then your duty cycle is reaching it's limit of 80-85%.

On that same log I was pushing 17-18 pulse width and only saw 75-78% duty cycle. But I also command around 11 AFR and it dropped to 10.8 once I hit past 5,000 rpms.
 
Alright. Good to know. I recently got my car tuned and so far it seems overall nicer to drive. As I get more things figure out, I want to work on dropping to my 3.2" pulley =)

On the 3.2" pulley I saw about 19.5 once on pulse width and I thought above 17 was kinda pushing it so I pulleyed up to the 3.4"
 
Yeah.,.very normal. Keep in mind that it'll have to do with fuel pressure (more pressure is less pulse, but regulator should keep pressure constant)
 
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