Fuel injector questions

95Blitz · 04-24-2008, 01:44 AM

When I open up caledit and go to the injector size the factory setting is 19 and min pulsewidth is 131.

I have 60lb injectors now.
If I change the injector size to .0167 and the min pulsewidth to .0007 the truck won't start.

But if I set injector size to 60 and keep the min pulsewidth at 131 it will start right up.

I have the ICY1 ECU and the Tweecer RT.

I ran 30lb'er in the truck for about a year with the injector size set at 30 and the min pulsewidth at 131 but I did have an FMU.

SO whats up with that why can't I do the injector size in lb/sec.?

95Blitz · 05-17-2008, 09:37 PM

ANYONE

giddyup · 05-18-2008, 12:15 AM

http://www.nloc.net/vbforum/gen-1-tu...cer-faq-s.html

read that carefully......steve tells you what so change to get it to start.

95Blitz · 05-18-2008, 12:50 PM

Quote:

Originally Posted by giddyup

http://www.nloc.net/vbforum/gen-1-tu...cer-faq-s.html

read that carefully......steve tells you what so change to get it to start.

I read that but I'm still wondering why I have to but 60 in for the injectors not the .01667?

It will run with 60 but not with .01667

giddyup · 05-21-2008, 06:59 AM

did you change this.........? the "fuel crank pulse width function" must be changed or you will flood your engine while cranking because the bigger injectors are just dropping too much fuel. Try inputting the following "Y" values from left to right: .061,.049. .014, .013. .005, .005, .006, .008, .008, .008.

giddyup · 05-21-2008, 07:02 AM

also steve told me this for my 50s....maybe it will help.

Would recommend starting out on a min. injector pulsewidth of .000875

04-24-2008, 01:44 AM	#1 (permalink)
95Blitz Registered User Join Date: Aug 2000 Location: Dothan, AL, USA Posts: 2,499 View this user's gallery iTrader: 6 / 100%	Fuel injector questions When I open up caledit and go to the injector size the factory setting is 19 and min pulsewidth is 131. I have 60lb injectors now. If I change the injector size to .0167 and the min pulsewidth to .0007 the truck won't start. But if I set injector size to 60 and keep the min pulsewidth at 131 it will start right up. I have the ICY1 ECU and the Tweecer RT. I ran 30lb'er in the truck for about a year with the injector size set at 30 and the min pulsewidth at 131 but I did have an FMU. SO whats up with that why can't I do the injector size in lb/sec.?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode




Home \| Classified Ads \| Gallery \| Join the Club \| Register on the Forum \| Merchandise \| Supporting Vendors \| Chat

05-17-2008, 09:37 PM	#2 (permalink)
95Blitz Registered User Join Date: Aug 2000 Location: Dothan, AL, USA Posts: 2,499 View this user's gallery iTrader: 6 / 100%	ANYONE

05-18-2008, 12:15 AM	#3 (permalink)
giddyup Moderator Paid Member Join Date: Sep 2006 Location: Lake Charles LA Posts: 4,582 NLOC member #: 2230 View this user's gallery iTrader: 14 / 100%	http://www.nloc.net/vbforum/gen-1-tu...cer-faq-s.html read that carefully......steve tells you what so change to get it to start.

05-21-2008, 06:59 AM	#5 (permalink)
giddyup Moderator Paid Member Join Date: Sep 2006 Location: Lake Charles LA Posts: 4,582 NLOC member #: 2230 View this user's gallery iTrader: 14 / 100%	did you change this.........? the "fuel crank pulse width function" must be changed or you will flood your engine while cranking because the bigger injectors are just dropping too much fuel. Try inputting the following "Y" values from left to right: .061,.049. .014, .013. .005, .005, .006, .008, .008, .008.

05-21-2008, 07:02 AM	#6 (permalink)
giddyup Moderator Paid Member Join Date: Sep 2006 Location: Lake Charles LA Posts: 4,582 NLOC member #: 2230 View this user's gallery iTrader: 14 / 100%	also steve told me this for my 50s....maybe it will help. Would recommend starting out on a min. injector pulsewidth of .000875