1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Sending units, rough idle, and non working fan...

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Old 01-25-09, 03:39 PM
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VDubs
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Sending units, rough idle, and non working fan...

So I have a 85 GSL-SE and went to install an E-fan. I bought the Painless wiring kit, but didnt want to drill into the housing or anything, so I just figured I could use the stock sending unit and just cut the connectors and wire it into the Painless relay as is. What I didnt know, was that there were more than one temp sending unit on the 13b. The one I used was the one above the water pump below the thermostat. Now my car idles like crap, sounds like a misfire kinda. and doesnt drive that well either. I read somewhere on here that sending unit controls the choke? If the wires are cut, my car should run fine after it gets warmed up correct? And can I use that unit to wire into the relay or am I going to have re-do everything and use the one in rear housing?
Old 01-25-09, 04:33 PM
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Old Fart Young at Heart

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The sender for the temp gauge is below the oil filter, near that 'mushroom' looking thingy and has a single wire. Thyis sender won't work for your purpose either. The sending unit you used needs replaced with a stock one for the engine to idle/run correctly.

I have an E-fan mounted on the widebody. I bought one of those temp probes that clips to the backside of the radiator core to turn the fan on/off. Most auto parts stores carry them for about 25 bucks. I bought the adjustable one, wired it through a relay and then set it's on/off function with an aftermarket temp gauge.

The sender that you cut the wires to sends an 'on' signal to the ecu when the coolant temp is over 59*F. Sec 4B, p. of the 85 FSM.

If you don't have a copy of the FSM, download it from the link in my sig line.
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Old 01-25-09, 06:47 PM
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VDubs
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Thanks for the help. I was looking in the FSM that is posted in the FAQ section, but couldnt find that thing, I looked in the Engine, Cooling, Electric, and Body electric... I need some more posts to be able to see your signature, so I am off to make some random posts somewhere...
Old 01-25-09, 07:47 PM
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Download YOUR copy of the FSM Then read it.

http://www.wankel.net/~krwright/cars/rx7/manuals.html

I won't tell you again.

Attention: newbies. READ THE FAQs, OR

Upgrade your beehive oil cooler here. https://www.rx7club.com/1st-gen-archive-71/cooling-oil-how-install-fc-oil-cooler-1st-gen-write-up-pics-478521/


My toy. https://www.rx7club.com/build-threads-293/unvieling-12a-bp-widebody-462184/

The above part is my sig.
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