- 0
couple chevy vortec questions
-
Recently Browsing 0 members
- No registered users viewing this page.
-
Forum Statistics
245.8k
Total Topics2.6m
Total Posts -
Member Statistics
-
Who's Online 24 Members, 0 Anonymous, 2,129 Guests (See full list)
Question
Dirtautoguy
I have a 1996 chevy k1500 with a vortev 350. the truck has 230,000 miles here are some recent maintanance items I have done with it.
plugs
distributor
cap
rotor
wires
fuel pump
fuel injector cleaner
clean air filter
recently my mpg has dropped quite a bit from getting 17-20mpg I have only been getting 10-13 mpg. I have been watching my peramiters and this is what i have came up with.
font O2 sensors: they swing high and low like they are supposed to however they do tend to stay in the 75 80s range alot.
rear O2 sensors: seem to be all over the place especially on bank 1. it will stay in the 50-70 range for a short time then swing down to 10-20ish range.
fuel trims: are always negative especially at idle. as rpms go up it becomes less rich and closer to normal.
long term bank 1: -10 at idle and works down to -5 with rpm or speed
long term bank 2:-8 at idle and works down to about 0 or -3 with rpm or speed
knock retard: at idle hangs out around 20 and often reaches 40 or 45.
My first thought was a catalytic converter. I unbolted the exhaust where the front and rear halves come together and looked at the catalytic converter the one that I could see looked great and brand new. I couldnt see the other catalytic converter but I can beat on it and something inside it sounds loose. not heavy but loose.
A friend mentioned that I might have a leaking injector which I hear about the spider injectors with poppet valves. so I took a look inside the throttle body with a flashlight and i found that the lines I could see were wet. and there was also some puddles on the bottom of the intake. I did get a small smell of gas but its not clean where the puddle is and im not sure what the liquid is but I am sure it shouldnt be there. what are your guyses thoughts???
My other question is not related to this issue but I am curious.
is the updated 4l65e transmission a straight bolt up to my 96 k1500 with a 4l60e? from what i hae researched and understand they are about the same just with better internals. if/when the time comes to replace mine I wouldnt mind putting a heavier one in more just for piece of mind.
Link to comment
Share on other sites
7 answers to this question
Recommended Posts
Archived
This topic is now archived and is closed to further replies.