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  #1  
Old 06-02-2008, 10:49 PM
rcounts's Avatar
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Location: Kent, WA
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Bellhousing mounted tach sensor for 84 300CD

Anybody know where to get one without paying > $50 for it?

I'd be happy with a good used one, if anyone has one they'd like to sell cheap.

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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown
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  #2  
Old 06-05-2008, 02:48 AM
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Anybody even know what years & models used the same sensor?
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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown
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  #3  
Old 06-05-2008, 03:12 AM
DeliveryValve's Avatar
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Quote:
Originally Posted by rcounts View Post
Anybody even know what years & models used the same sensor?
300D and 300SD, years 1984 and 1985 only.
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  #4  
Old 06-05-2008, 03:48 AM
ForcedInduction
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And 300TD.
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  #5  
Old 06-05-2008, 04:24 AM
rcounts's Avatar
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So basically all W123 series - but only an 84 or 85 model, huh?
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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown
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  #6  
Old 06-18-2008, 01:40 AM
rcounts's Avatar
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Well, I thought I had one, but it turned out to be no better than the one already in my car. Both measure right about 1.9k Ohms resistance as they should (according to the manual), but they only produce a few millivolts at idle - instead of approximately 4 volts like the manual says they should.

Anybody else got a GOOD one I could get from you cheap?
__________________
1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown
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  #7  
Old 06-18-2008, 02:58 PM
OldPokey's Avatar
0-60 in 10 minutes flat
 
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Location: Middletown MD
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That's 4 volts while they are connected. It seems your sensor is OK - the amplifier (inside the tach or computer in those models) is not sourcing the current or you have a broken wire somewhere.
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1984 300TD

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  #8  
Old 06-18-2008, 03:03 PM
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Location: Sunnyvale, Texas (DFW)
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And I hear that broken wires do happen.......

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'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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  #9  
Old 06-18-2008, 04:50 PM
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Join Date: Jan 2002
Location: New Jersey
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why not get a used tach and tach amp, and wire in on the old-fashioned setup? I bet it could be cut from a parts car nearly for free.

Are you sure everything else works?

JMH

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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