CK5
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should my 1985 305 cid have an Oxygen sensor?
- Thread starter zach78k5
- Start date
js4x4
1/2 ton status
look on the drivers side exhaust manifold, near where it mates up to the pipe....I have an 87 TBI engine, so not quite the same I know....
big83chevy4x4
3/4 ton status
my dads 85 k5 blazer didn't have one. i guess the cali emisions(sp) could have one /forums/images/graemlins/dunno.gif
k20
3/4 ton status
no, because it isnt fuel injected, it would be pointless to have an O2 sensor, because the carb cant adjust to whatever the O2 is reading.
It will for surely have one if it is equipped with the california standard emmissions equipment. It will have the wonderfull computer controlled carb and distributer setup.
mahorney
Registered Member
It don't believe it does. I took some parts off a stock 85 truck with 305 that didn't have one. I bought a set of edelbrock emmissions legal headers and they have the oxygen sensor port on the driver's side. Had to plug hole.
BlackDog714
1/2 ton status
My 85 had the "High Altitude Emissions" package with a knock sensor, but no O2 sensor.
K5MONSTERCHEV
1/2 ton status
[ QUOTE ]
It will for surely have one if it is equipped with the california standard emmissions equipment. It will have the wonderfull computer controlled carb and distributer setup.
[/ QUOTE ]
Correct, if it has a feedback carb, it has an O2S!
It will for surely have one if it is equipped with the california standard emmissions equipment. It will have the wonderfull computer controlled carb and distributer setup.
[/ QUOTE ]
Correct, if it has a feedback carb, it has an O2S!
As was stated, with a feedback carb (CCC system) it WILL have an O2 sensor. Apparently not a knock sensor. This apparently applies ONLY to certain models destined for CA originally.
R72K5
Banned
80-up is when the system existed, most of them all had O2 and MAP sensors, etc, this system was used on lighter max load(GVWR) rated cars and trucks under 8000 or 8001 lbs,
heavier max load rated vehicles had a TCS system, a metal relay deal on driver side valve cover, this was for heavier GVW vehicles, mostly with 4 speed but not limited to that
heavier max load rated vehicles had a TCS system, a metal relay deal on driver side valve cover, this was for heavier GVW vehicles, mostly with 4 speed but not limited to that
Not quite. CA only emissions trucks were either CCC, or not. CCC uses both O2 and MAP, no exceptions. If it doesn't have those, it doesn't have a "feedback" carb, and is not CCC.
One interesting difference between CCC cars and trucks is that *apparently* the trucks didn't use a knock sensor in all CCC setups (or perhaps any) along with Oldsmobile engines which also didn't use a knock sensor until about 1987, while all Chevy car applications did.
CCC was used on ALL carbed GM *cars* starting in 1981 and ending in 1990. Started in 1980 IIRC only on Cadillacs, at best a VERY limited number of vehicles, not 100% as in 1981.
One interesting difference between CCC cars and trucks is that *apparently* the trucks didn't use a knock sensor in all CCC setups (or perhaps any) along with Oldsmobile engines which also didn't use a knock sensor until about 1987, while all Chevy car applications did.
CCC was used on ALL carbed GM *cars* starting in 1981 and ending in 1990. Started in 1980 IIRC only on Cadillacs, at best a VERY limited number of vehicles, not 100% as in 1981.
J
J.R.
Guest
mine had the knock sensor but no O2...
Then it's ESC, not CCC.
