HELP!! 1993 f350 tach not working!! - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 10 (permalink) Old 03-12-2012, 04:35 AM Thread Starter
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HELP!! 1993 f350 tach not working!!

hello im new to PSN and i just got a 93 f350 RC/LB 7.3 IDI and the tach doesnt work. I could really use some help on this! any help is appreciated! thanks

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post #2 of 10 (permalink) Old 03-12-2012, 01:16 PM
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Re: HELP!! 1993 f350 tach not working!!

Where in Iowa you located? I'm in the northwest corner by sioux city.

Anyway if you are a 5 speed I know in the older manual trucks Basically the two wires off the tach sender on the oil filler run right to the gauge cluster. I would bet if you check resistance and see resistance at the tach sender then it's fine. Then I myself would probably pull the cluster and check the plug there. If you still have resistance than you know the wiring back to the tach sender is good. Then I'd probably replace the gauge cluster or at least the tach part of the cluster.

I know that's a pretty loose plan but hopefully it helps. I figured you have a manual as you didn't say anything about transmission lights or poor shifting and I believe the lack of a tach signal messes up the E40d's. I myself had an intermittent tach. My truck used to be an Auto and had the E40d transmission computer in it still. And on the E40d's in the older trucks the tach signal runs through the computer.

1989 f350 Crewcab 4x4 - Basically getting full frame off rebuild. Doing paint and body now. Photos on Flickr

1993 F250 - Regular Cab, 5-speed, 4x4, Factory Turbo, Western Plow Photos on Flickr

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post #3 of 10 (permalink) Old 03-12-2012, 09:52 PM Thread Starter
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Re: HELP!! 1993 f350 tach not working!!

thank you so much!! I live near oskaloosa.

when you say resistance do you mean checking if it has 12v?

Mine-Green 1993 F350 RC/LB 7.3 idi with 2in lift 5 speed SOLD

Dads-Green 1996 F250 Ext. Cab long box 7.3(plow/work truck) Auto 265,000 miles

New truck 2001 F350 CC/DRW Lariat 7.3 PSD white 220,000 milesALABAMA TRUCK!

Brothers-Red 2001 F350 Ext. cab LB DRW 6 speed
Billy Dog Triple Dog Power Pup 110,000 miles
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post #4 of 10 (permalink) Old 03-12-2012, 09:55 PM Thread Starter
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Re: HELP!! 1993 f350 tach not working!!

do you by any chance know why a tstat wouldnt be working?

Mine-Green 1993 F350 RC/LB 7.3 idi with 2in lift 5 speed SOLD

Dads-Green 1996 F250 Ext. Cab long box 7.3(plow/work truck) Auto 265,000 miles

New truck 2001 F350 CC/DRW Lariat 7.3 PSD white 220,000 milesALABAMA TRUCK!

Brothers-Red 2001 F350 Ext. cab LB DRW 6 speed
Billy Dog Triple Dog Power Pup 110,000 miles
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post #5 of 10 (permalink) Old 03-12-2012, 10:24 PM
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Re: HELP!! 1993 f350 tach not working!!

Make sure your tach wires arent touching each other. I had to splice mine and put some heat shrink on to make it work... Hell of a lot cheaper than buying a new tach sensor...
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post #6 of 10 (permalink) Old 03-13-2012, 01:12 AM Thread Starter
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Re: HELP!! 1993 f350 tach not working!!

i took it off today and i looked like my plug was bad. how much do them things fun?

Mine-Green 1993 F350 RC/LB 7.3 idi with 2in lift 5 speed SOLD

Dads-Green 1996 F250 Ext. Cab long box 7.3(plow/work truck) Auto 265,000 miles

New truck 2001 F350 CC/DRW Lariat 7.3 PSD white 220,000 milesALABAMA TRUCK!

Brothers-Red 2001 F350 Ext. cab LB DRW 6 speed
Billy Dog Triple Dog Power Pup 110,000 miles
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post #7 of 10 (permalink) Old 03-13-2012, 03:37 AM
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Re: HELP!! 1993 f350 tach not working!!

If you replace the Tstat everybody swears by the motorcraft. Evidently otherones can be small.

Yeah if the plugs bad put a new plug on and call it good. Hopefully that's all it is. You could also put a volt meter across the terminals of the sensor and see if you get a millivolt reading while the engine is running.

Good luck. I never did figure out my tach problem before I tore my truck apart. Now I gutted the e40d computer and hope that fixed it.

1989 f350 Crewcab 4x4 - Basically getting full frame off rebuild. Doing paint and body now. Photos on Flickr

1993 F250 - Regular Cab, 5-speed, 4x4, Factory Turbo, Western Plow Photos on Flickr

2007 H&H 8x30 enclosed trailer Bought wrecked Photos of Rebuild
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post #8 of 10 (permalink) Old 03-13-2012, 04:07 AM Thread Starter
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Re: HELP!! 1993 f350 tach not working!!

Yeah motorcraft is ford. Having a 5 speed is a major plus! thanks for all the information!

do you know where i could get all the interior trim for a regular cab? my truck didnt come with a
headliner of any of the plastic trim

Mine-Green 1993 F350 RC/LB 7.3 idi with 2in lift 5 speed SOLD

Dads-Green 1996 F250 Ext. Cab long box 7.3(plow/work truck) Auto 265,000 miles

New truck 2001 F350 CC/DRW Lariat 7.3 PSD white 220,000 milesALABAMA TRUCK!

Brothers-Red 2001 F350 Ext. cab LB DRW 6 speed
Billy Dog Triple Dog Power Pup 110,000 miles
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post #9 of 10 (permalink) Old 03-13-2012, 06:08 AM
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Re: HELP!! 1993 f350 tach not working!!

LMC Truck Parts - Page 1


everything you need
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post #10 of 10 (permalink) Old 03-14-2012, 01:01 AM Thread Starter
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Re: HELP!! 1993 f350 tach not working!!

awesome! thank ya much

Mine-Green 1993 F350 RC/LB 7.3 idi with 2in lift 5 speed SOLD

Dads-Green 1996 F250 Ext. Cab long box 7.3(plow/work truck) Auto 265,000 miles

New truck 2001 F350 CC/DRW Lariat 7.3 PSD white 220,000 milesALABAMA TRUCK!

Brothers-Red 2001 F350 Ext. cab LB DRW 6 speed
Billy Dog Triple Dog Power Pup 110,000 miles
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