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slanty6
TBI Slant 6
Joined: 25 Oct 2005
Posts: 204
Location: Addison Illinois
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Post subject:
"Idiot" lights on 1975 Dodge Coronet
(Wed Apr 24, 2013 5:56 pm)
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| Got a "new" ride. Been going over it thoroughly and next to the dash indicator lights that say "Fasten Belt" & "Brake" there are two labeled "Catalyst" & "Check EGR". Was there some sort of sensor that would actually make the last two come on ?? Just wondering..
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DusterIdiot
Board Sponsor
Joined: 29 Oct 2002
Posts: 7113
Location: Salem, OR
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Post subject:
Yep...
(Wed Apr 24, 2013 6:26 pm)
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| Quote: | | "Check EGR". Was there some sort of sensor that would actually make the last two come on ?? |
the Check EGR light was tied to a switch in a module that was put inline with the speedo cable, when you hit the programmed mile indicator it lit the light, where either A) the Dodge tech used a screwdriver to reset the module or per some 1976 bulletins they removed it and installed a normal speedo cable.
-D.Idiot
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slanty6
TBI Slant 6
Joined: 25 Oct 2005
Posts: 204
Location: Addison Illinois
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Post subject:
(Wed Apr 24, 2013 8:42 pm)
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| Aaahh, very good. Thank you! Anyone care to venture a guess on the catalyst light ?
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DusterIdiot
Board Sponsor
Joined: 29 Oct 2002
Posts: 7113
Location: Salem, OR
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Post subject:
Lol...
(Wed Apr 24, 2013 9:51 pm)
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| Quote: | | Aaahh, very good. Thank you! Anyone care to venture a guess on the catalyst light ? |
Sorry no help there, my 1976 Electrical manual shows the other lights and that spot on the dash indicates something there but there is no light or circuit for it in 1976...(must've been problematic).
-D.Idiot
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Eric W
Supercharged
Joined: 03 Nov 2002
Posts: 2532
Location: Lubbock, TX
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Post subject:
(Thu Apr 25, 2013 6:37 am)
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Hey Dave! Another "slanted" B body?_________________ Eric
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Ssg Pohlman
TBI Slant 6
Joined: 10 Jun 2012
Posts: 151
Location: Terre Haute IN
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Post subject:
(Thu Apr 25, 2013 7:28 am)
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closest thing I could find for catalyst:
"The expected catalyst life is 50,000 miles, provided that the engine is kept in tune and unleaded fuel is used.
To keep the catalyst from being overheated by an overly rich mixture during deceleration, a catalyst protection system (CPS) is used on some 1975 models. The system consists of a throttle positioner solenoid (not to be confused with the idle stop solenoid), a control box, and an engine rpm sensor"
Maybe an idiot light to have it looked at to make sure the "new" cats were still good after a certain point. 
_________________
Original 225 /,Super 6 setup,A833OD, 8 1/4 LSD 3:55, Lean burn delete, GM HEI,99 Durango starter, Added power steering
Operation Noble Eagle 03-05
Operation Iraqi Freedom 05-07
Operation Enduring Freedom 12- still here
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slanty6
TBI Slant 6
Joined: 25 Oct 2005
Posts: 204
Location: Addison Illinois
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Post subject:
(Thu Apr 25, 2013 12:51 pm)
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Thanks guys for all the info ! I much appreciated it !
Eric-- Yup one more for the stable. This is my daily driver and is getting a thorough going over to let it perform like it should. It's a 50k original mile car with alot of original chrysler parts on it (38 year old parts). So some replacement/ rebuilding is in order..
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DusterIdiot
Board Sponsor
Joined: 29 Oct 2002
Posts: 7113
Location: Salem, OR
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Post subject:
Actually...
(Thu Apr 25, 2013 2:04 pm)
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| Quote: | | Maybe an idiot light to have it looked at to make sure the "new" cats were still good after a certain point. |
Given that info, the system would probably act like the "fuel Pacer"system where the rpm sensor would signal the solenoid to keep the rpm limited to a certain level to keep the cat from over heating...and probably light the idiot light if the throttle and rpm remained past the factory setting/comfort level.
"Hey honey, we should back off the accelerator, the cat light just came on...maybe we should go to the dealer and get that checked out, I was only doing 90 mph for the last 30 minutes up hill!!!!"
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slanty6
TBI Slant 6
Joined: 25 Oct 2005
Posts: 204
Location: Addison Illinois
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Post subject:
(Thu Apr 25, 2013 8:42 pm)
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It's funny you brought up the "Fuel Pacer System", as this car has it and it functions like it should..... 
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DusterIdiot
Board Sponsor
Joined: 29 Oct 2002
Posts: 7113
Location: Salem, OR
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Post subject:
It's loaded...
(Thu Apr 25, 2013 9:07 pm)
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I'd be interested in your fender tag codes to see what "packages" you had installed.
If I remember right on the fuel pacer the driver's side fender turn signal will light if the vacc. reading at the carburator is below 6"hg (meaning "get your foot off the pedal! You're wasting gas (and polluting)!!!!"
-D.Idiot
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Eric W
Supercharged
Joined: 03 Nov 2002
Posts: 2532
Location: Lubbock, TX
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Post subject:
(Fri Apr 26, 2013 6:54 am)
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Cool. How is the ol Satellite treating you?_________________ Eric
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Ssg Pohlman
TBI Slant 6
Joined: 10 Jun 2012
Posts: 151
Location: Terre Haute IN
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Post subject:
(Fri Apr 26, 2013 7:39 am)
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the last two lines after my previous findings is this:
"Any time that the engine speed is more than 2,000 rpm while decelerating from highway speeds, the solenoid is energized and keeps the throttle butterfly from fully closing, thus preventing the mixture from becoming too rich."
Seems legit So nice living in indiana,(thick country accent) "it got 4 o dem tires and an egine son?" yes sir! "well hell, go on and here ye regeestration 2" 
_________________
Original 225 /,Super 6 setup,A833OD, 8 1/4 LSD 3:55, Lean burn delete, GM HEI,99 Durango starter, Added power steering
Operation Noble Eagle 03-05
Operation Iraqi Freedom 05-07
Operation Enduring Freedom 12- still here
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slanty6
TBI Slant 6
Joined: 25 Oct 2005
Posts: 204
Location: Addison Illinois
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Post subject:
(Sun Apr 28, 2013 10:56 am)
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DI here ya go. You've got me curiuos now
19118-189563 025 309476
28 G11 M15
V1Y U G01 H51
LY6 N1Y3 000 429 087058
E24 D34 WH41 C5A 190714
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slanty6
TBI Slant 6
Joined: 25 Oct 2005
Posts: 204
Location: Addison Illinois
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Post subject:
(Sun Apr 28, 2013 10:58 am)
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| BTW, Eric The Satellite is fine. It is in dry storage in my mom's garage. Everytime I look at the grill of that car I just smile..
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DusterIdiot
Board Sponsor
Joined: 29 Oct 2002
Posts: 7113
Location: Salem, OR
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Post subject:
Here it is...
(Sun Apr 28, 2013 11:35 am)
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E24=225 slant six 1 bbl
D34= standard A904 Transmission
W= Coronet
H=High class package
41=4dr Sedan
C=225 slant six
5=1975
A=Lynch Road Detroit, MI
190714 = Serial Number
LY6 = Inca Gold Metallic Paint
N1Y3 = N Class interior/Straight Bench Seat//Gold Color
000 = Full Door Panels
429 = Production Date April 29, 1975
087058= Vehicle Order Number
V1Y= Full Vinyl Roof Gold Color
U = USA Market
G01 = Electric Heat Rear Window Defogger
H51 = Air Conditioning with Front Heater
28 = Radiator Dimension (Lynch Road plates have this oter plant may not)
G11 = Tinted Glass all windows
M15 = Door/Qtr Panel/Upper Frame Mouldings
19118-189563 025 309476 = Numeric Sequence for Lynch Road plant-Gate Series and Line Sequence for assembly.
A few articles note that Lynch Road also didn't stamp all the codes for equipment on the tag, so a Fuel Pacer and Cat Convertor code can be on the car, and may show up on the production sheet under the deat/behind the glovebox, but may not show up on the fender tag.
Cheers,
-D.Idiot
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