Hi all -- new to this forum because I have not had any problems with my Chevy van in tens of thousands of miles.
Now, I am here because I have a problem -- it is an '89 Chevy G20 (3/4 ton) conversion van with a 5.7L TBI and 193k miles on her. Just within the last month, it has started to hesitate off the line when cold -- then runs ok when it warms and then it starts hesitating again when I have been driving for a longer period of time. When I am up to speed on the highway it is fine -- even though sometimes when I accelerate at hwy speeds, it does hesitate a hair. Also, sometimes it does want to act like it is going to stall after a long run on the hwy -- when I come to a stop. When it hesitates off the line, if I really feather the gas super quickly, she goes -- but I really have to feather the throttle a lot.
I have recently done the fuel filter, plugs, wires, cap/rotor, and 02 sensor. I have not checked the fuel pressure (I am going to get the gauge and learn how soon if need be).
I do have a stored error code 44 "lean exhaust" which says to check fuel pressure causing a lean running condition. My first thought is the fuel pressure regulator which I plan on installing this morning -- but wanted to ask you all b/c I hate just throwing things in it w/out some expert opinions first.
Also, it usually will need a little throttle to start when at normal running temp (hot) -- which is what led me to the fuel pressure regulator as the possible culprit.
Any help/thoughts here would be great and much appreciated.
Thanks in advance!