Inconsistent guage readings in 1977 Cherokee
08-29-2005, 10:28 PM
#41
Guest
Posts: n/a
Re: Inconsistent guage readings in 1977 Cherokee
"Hootowl" <ELN/zooo@earthlink.net> wrote in message
news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com...
....
> I'll check that page out. I've also been told I can get all the parts
> to make one at Radio Shack. I had already thought about that, but will
> have to check my service manual to determine the correct voltage
> output.
That's the rub... constant voltage won't do it,
the bimetallic regulator compensates for temperature.
Now if you use a circuit that varies the voltage with
temperature, *that* might work... just plugging in
a 7808 TO220 three-terminal regulator won't get
you happiness, I'm betting...
__
Steve
..
08-31-2005, 10:35 PM
#42
Guest
Posts: n/a
Re: Inconsistent guage readings in 1977 Cherokee
On Tue, 30 Aug 2005 02:28:09 GMT, "Stephen Cowell"
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
08-31-2005, 10:35 PM
#43
Guest
Posts: n/a
Re: Inconsistent guage readings in 1977 Cherokee
On Tue, 30 Aug 2005 02:28:09 GMT, "Stephen Cowell"
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
08-31-2005, 10:35 PM
#44
Guest
Posts: n/a
Re: Inconsistent guage readings in 1977 Cherokee
On Tue, 30 Aug 2005 02:28:09 GMT, "Stephen Cowell"
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
08-31-2005, 10:35 PM
#45
Guest
Posts: n/a
Re: Inconsistent guage readings in 1977 Cherokee
On Tue, 30 Aug 2005 02:28:09 GMT, "Stephen Cowell"
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
<scowell@sbcglobal.net> wrote:
>
>"Hootowl" <ELN/zooo@earthlink.net> wrote in message
>news:7e7tg1djrem27m1rtei2efnr906vcop5mi@4ax.com.. .
>
>...
>
>> I'll check that page out. I've also been told I can get all the parts
>> to make one at Radio Shack. I had already thought about that, but will
>> have to check my service manual to determine the correct voltage
>> output.
>
>That's the rub... constant voltage won't do it,
>the bimetallic regulator compensates for temperature.
>Now if you use a circuit that varies the voltage with
>temperature, *that* might work... just plugging in
>a 7808 TO220 three-terminal regulator won't get
>you happiness, I'm betting...
Actually, the service manual (AMC) calls it a "Constant Voltage
Regulator." Anyway, my career Jeep mechanic friend says they
virtually never fail, that I have a ground problem. It stopped
raining yesterday, so I pulled the panel out. I found a loose
grounding lug and tightened it, and the oil pressure gauge was loose,
so I tightened the nuts on it's mounting studs. I got proper readings
when I started the Jeep, and also on the way to and from work today
(but that's only six minutes each way). I especially got much better
oil pressure readings. I know I'v had a bad sending unit for a couple
of years. Every one I bought back then gave different, and erroneous,
readings (both too high and too low) regardless of the source. The
only one I've had that gave accurate readings was the one I got from
the Jeep dealer (made in USA, not Mexico like all the others) and paid
$70.00US for when I rebuilt the engine five years ago. It was damaged
in the violently superhuman effort necessary to remove an oil filter
improperly installed by the local Jiffy Lube. It was as though it had
been installed using red loctite and an impact wrench. We finally
removed it's remnants with a hammer and chisel, with the pump cover
removed from the engine. The effort took over an hour. I've had to
run a screwdriver through them before in order to turn them off, but
nothing like that. Even with the can removed and the end cap bent
upwards, it refused to come off. Any idea how they did it? Can a
filter wrench get one THAT tight? Anyway, I'll probably buy another
sending unit now, or try a couple I already have that I got from a
salvage yard about a year ago.
Dan
>__
>Steve
>.
>
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