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-   -   Missing a relay?? (https://www.thirdgen.org/forums/electronics/762302-missing-relay.html)

jbuck_atlanta 06-25-2019 06:37 PM

Missing a relay??
 
I have a 1989 305ci v8 with auto trans. I believe tbi if its got the fat round thing in the middle. I was just replacing my fan relay again for the fourth time in the past month (could use help on that too) and so I just looked up what all the relays are supposed to look like. Every page seems to mention 3 relays on the drivers side panel but I only have 2(picture at bottom). My engine will also shut off whenever I put it in drive, reverse, or leave it in park for a couple minutes. I also have a question about underneath the tbi round thing that the air filter is in (please tell me the name so I can say it correctly). There is a vacuum hose plugged into the bottom of it that goes to a blue thing in the air filter labeled “AC” in the inside (picture at bottom) and when i unplug it the car idles higher and when its plugged up it shuts the car off. Ive put in new spark plugs, wires, and fuel filter today.
https://cimg4.ibsrv.net/gimg/www.thi...a8f0fbae1.jpeg
https://cimg7.ibsrv.net/gimg/www.thi...1b17dce2e.jpeg

Tuned Performance 06-25-2019 08:51 PM

Re: Missing a relay??
 
The blue thing appears to be a temp sensor for the hot gasses of the heater stove pipe.
what relay is missing ?
fuel pump and fan should be the only ones there.
https://cimg2.ibsrv.net/gimg/www.thi...b5e4e5d3e.jpeg

Tremo 06-26-2019 05:43 PM

Re: Missing a relay??
 
I believe the cars with the extra relay there are TPI cars, and the extra relay is for MAF burnoff. You don't have a MAF so no need for a burnoff relay.

NINÅ 07-01-2019 08:36 AM

Relay Race
 

Originally Posted by jbuck_atlanta
replacing my fan relay again for the fourth time in the past month

The stock relay is barely unuff to do the job.

The main contacts are too small, plastic chosen for the unit has too low of a melting temp.

There is more than one way to cure the problem.

A proven successful way is to install a 70 amp relay in the circuit.

The 70 amp unit will then be energized by stock wimpy relay.

Wimpy relay will now last 4ever.

Use heavier wire for the 70 amp unit.

The power increase to your fan will be 17%

Make your temp gage say “ahhh that’s better”.


Happy Racing !



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