djb118
Newbie
Hey ya'll, I have a '98 K1500 with a 5.7 Vortec (vin code R). The truck has 230k on it, so i decided I would do the MPFI upgrade. I figured it had the original CFI in it. Well, I took it apart and discovered it already had an FJ504 (O'Reilly's) injector in it. Being as I had a brand new one (same FJ504) on hand, I decided I would just replace it. After replacing it and putting everything back together I primed the fuel a few times and started the engine. It started great! It developed a misfire on cyl 4 after about 2 minutes of running but then the misfire disappeared. So I decided to take the truck to get gas as it was running low. I filled up on gas and then I started it. It ran for probably 30 seconds (very roughly), my check engine light started flashing and then the engine shut off abruptly. I tried to crank it up again and it wouldnt budge. At this point I realized it might be seized. Called a tow and had it take my truck back home (.2 miles = $105).
Now I'm sitting here wondering what to do next? I can assume it was either the regulator puking fuel under the plenum, or the injector on cyl 4 is just puking fuel into the cylinder. I'm also worried about my connecting rod on cyl 4 being bent after it seizing the way it did. Is there a way to purchase JUST the regulator and replace it if that's the problem? How would I test if the injector is just spraying all willy nilly? How would I test if the rod is bent? I would also like the note that the engine bay smelled like fuel, but no leak was visible. Is there a sure-fire spider injection assembly out there that (almost) never has these kinds of issues?
I would appreciate any and all advice!
Now I'm sitting here wondering what to do next? I can assume it was either the regulator puking fuel under the plenum, or the injector on cyl 4 is just puking fuel into the cylinder. I'm also worried about my connecting rod on cyl 4 being bent after it seizing the way it did. Is there a way to purchase JUST the regulator and replace it if that's the problem? How would I test if the injector is just spraying all willy nilly? How would I test if the rod is bent? I would also like the note that the engine bay smelled like fuel, but no leak was visible. Is there a sure-fire spider injection assembly out there that (almost) never has these kinds of issues?
I would appreciate any and all advice!