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94 4.3 vortec cpi chugging

8 messages,  Last post on Oct 19, 2009 at 11:02 AM

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#6 of 8 Re: 94 4.3 vortec cpi chugging [pcgeek] by garys_nj Mar 29, 2009 (10:23 am)
Replying to: pcgeek (Sep 03, 2008 7:51 pm) I think the "nut kit" you're referring to is the gas feed and return lines to the CPI (Spider). I have a problem with my s-10 blazer 4.3 vortec where it stalls and then won't restart without either (and then still sometimes won't start). I tried a couple things fixed some vacume leaks and changed spark plugs. it always had a lopey idle, now much worse idle and still stalling.. I removed the plenum and see a lot of gas in the intake belly around the spider and the gas feed line is almost worn through (contact with a poppet line). with pressure, I only see a weep from the feed line but I'm changing the spider and the feed/return lines (the nut?). seems like there's a bolt on a holding plate for the feed/return nipples) but I can't get a wrench or socket on it. anyone know how to replace the feed/return lines?? Replies to this message: tony2980 (Oct 19, 2009 10:56 am)
#7 of 8 Re: 94 4.3 vortec cpi chugging [garys_nj] by tony2980 Oct 19, 2009 (10:56 am)
Replying to: garys_nj (Mar 29, 2009 10:23 am) its not a nut its a star head to change those lines after you remove the star and the plate the lines slide out i had to use a tool that looked like an L shape they sell them at auto zone in a kit it was like 9.99 itwas a t30 ithink its been awhile or a t15 torx head thats what they are called
#8 of 8 cpi unit by tony2980 Oct 19, 2009 (11:02 am)
my blazer cranks up and runs but it sounds and idles like i have a big cam in it it runs really rough but at 65 70 it runs alot smoother i had it checked out at shop because i kept changeing stuff and my pockets are not that deep they are tellin me its the spider injection cpi unit and its kinda costly any suggestions

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