Kraig
Newbie
I picked up a 1997 K2500 Suburban w/454 in it that the previous owner had rebuilt, he drove it a few months & when the tranny took a dump I was able to buy it for a song & dance basically. I took it to my favorite transmission shop. (that was the deal with the wife, I couldn't do the tranny work) He put in a GM Goodwrench factory rebuilt 4L80e. A little bit of brake work and I have it on the street. It starts up great, but seems a little "cold blooded" at start up for about 15-30 seconds. (I know weird to call a FI engine cold blooded) but the problem I'm running into is that when I put it into gear it stalls. If I hold the brake and get the RPMs up to about 1000 then it doesn't stall. Once I'm driving it is usually OK but again at stop lights it wants to stall out about 1/2 of the time.
Unfortunately the "kid" I bought the burb from didn't know much about the engine other than they put in bigger injectors, a cam with 502 lift & valves to match, holly ignition, cold air intake, but they left the stock exhaust manifolds on. They also removed the cats on this one. I've lost touch with him so I have no good way to get further info on the engine like we originally talked about. I've hot rodded a few cars in my day but never really messed with a FI computer controlled engine. I can tell it needs some tweaks because it smells a little rich but it has been over 30 years since I've played with a carb'ed engine that is easy to play with.
I'd love some suggestions before I take it into a mechanic and at least try to eliminate the simple things like plugs, wires, cap, etc. I've replaced all 4 O2 sensors since one was smashed and one was missing. I really need it to run good at low RPM because my primary use for this 4x4 is for hunting and driving down rough log trails. My secondary use is towing my XJ 4x4 on a car trailer for off-roading.
HELP
Unfortunately the "kid" I bought the burb from didn't know much about the engine other than they put in bigger injectors, a cam with 502 lift & valves to match, holly ignition, cold air intake, but they left the stock exhaust manifolds on. They also removed the cats on this one. I've lost touch with him so I have no good way to get further info on the engine like we originally talked about. I've hot rodded a few cars in my day but never really messed with a FI computer controlled engine. I can tell it needs some tweaks because it smells a little rich but it has been over 30 years since I've played with a carb'ed engine that is easy to play with.
I'd love some suggestions before I take it into a mechanic and at least try to eliminate the simple things like plugs, wires, cap, etc. I've replaced all 4 O2 sensors since one was smashed and one was missing. I really need it to run good at low RPM because my primary use for this 4x4 is for hunting and driving down rough log trails. My secondary use is towing my XJ 4x4 on a car trailer for off-roading.
HELP