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 1992 SPI runs rich (temperature sensor still reads low when driving)

 Created by: mininerd
Orig. Posting Date User Name Edit Date
Jun 21, 2017 06:27PM mur  
Jun 2, 2017 03:30AM elpez  
Jun 1, 2017 02:39PM Spank Edited: Jun 1, 2017 02:40PM 
Jun 1, 2017 09:35AM mininerd  
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 Posted: Jun 21, 2017 06:27PM
mur
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I heard today that they found a blockage in the metal tube. Now with coolant flow the numbers are as they should be. Sadly, it still did not pass the emissions test. The brake master had recently failed but I am assured that the booster is not the source. One plug is less clean, so they will look at valve stem seals there.

I am keen to see this mini pass and get registered in its new province. Its owner is a great guy.

 Posted: Jun 2, 2017 03:30AM
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US
Keep the 88 deg thermostat  for the Spi, needs to run hot

 Posted: Jun 1, 2017 02:39PM
 Edited:  Jun 1, 2017 02:40PM
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Replace the faulty sensor. It's underneath on the intake manifold on the side closest to radiator

 Posted: Jun 1, 2017 09:35AM
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Hello,

I need your help. My 1992 SPI runs rich. I changed CTS, O2 Sensor, Vacuum Pipes, Injector, Catalytic. I failed the emission test after all this.

Just changed the thermostat for a new one. Coolant in rad gets up to temp but sensor still reads low when driving.

So either sensor, wires going to it, or the ossageway is partially blocked.

I used a 88 deg thermostat. Will pull the sensor, check the hoses and intake tubing, and re-check the wires from sensor to ECU.

And swap out for a 195 deg thermostat.

BTW gage still doesn't move. So car is still seeing engine as cold. Yet logs show it sees 70C or better until you start driving.

I'm pulling that coolant temp sensor to test in a pot of hot water again.

Going to run a bottle brush through the manifold piping and make sure it is clean and clear And re-check that wiring run for the coolant temp sensor.

What do you think ? Thanks