James Eufemia
Newbie
First real post beside the intro, what's up all? I'm having an issue and I can't find a single thread that will help so here it goes. I recently installed a bored out TBI from CFM Tech, as well as an injector spacer and a 14 psi spring from The Throttle Body Shop on my 1994 Chevy Suburban. The 'Burb has 125000 miles, 350 TBI, 4L60e, and 4wd. Now, when I crank the engine, it struggles to start, and when it fires it immediately goes to redline and stays there. Since I don't want to blow the engine up I don't leave it on for long but the amount of time I have left it running it stays right at 4500 rpm. After I ran into this problem, I've checked for vacuum leaks and found none. I've replaced the IAC and the connector since it wasn't seating right. I have a TPS with about 300 miles on it, and the throttle blades don't move and aren't open when it revs to redline upon startup. I took apart the injector pod and found it was flooded with gas, and upon watching it spray fuel, it's spraying it as if it's at WOT. I suspect the fuel pressure regulator is bad or I may have screwed something up, it wasn't doing this before the swap. I was just wondering if anyone has run into or heard of a problem like this. Any help would be a big help, and I'll update this if I find or fix anything. Thanks a bunch in advance.