Spi Emissions Fail. Vacuum Pipes Seem Deliberately Cut. O2 Sensor Not Budging...
Posted 06 June 2019 - 07:56 PM
After a poke around discovered the ECU to fuel trap was “snapped.. ok ordered a replacement. When installing the replacement, discovered the fuel trap to inlet manifold was also broken in two.
Now that’s too much of a coincidence. I wasn’t sure how the first one snapped into two, never mind both so I think it’s a fair assumption this was deliberate by the previous owner. I’m guessing to make it run rich on purpose? So I’ve got a replacement one of them ordered but bit worried about what this is hiding now.
Also, got myself a usb cable for diagnosing the sensor readings and Hooked it up to memsdiag. The lambda sensor seems stuck at 435mv. Won’t budge engine running or not. Disconnected the sensor and no change. Any easy check I can do to determine if it’s the sensor at fault or something between it and the ecu? I’ve got a new sensor on its way but don’t really want to figure out how to get the inlet manifold off to replace it if it’s not the sensor at fault.
Anyway, any advice from any spi wizards?
Posted 06 June 2019 - 08:09 PM
Posted 06 June 2019 - 08:15 PM
Definitely replace all 4 vacuum pipes plus the fuel trap, they're effectively service items.
Yes, I also have the fuel trap arriving tomorrow or Saturday but there’s a k&n air filter on there so the other one coming from the inlet manifold looks blocked up. So think it’s only the two going in and out the fuel trap?
Posted 07 June 2019 - 01:24 PM
the elbows on these don't last long , and in most cases are the reason for poor running . Try changing the pipes,elbows to silicone hoses
Posted 08 June 2019 - 02:12 PM
Use silicon hoses matching the color of the original vac-lines. ID 3 mm. You do not need any elbows and stick the silicon hoses direct on the nipples.
Einlass-Krümmer = Manifold
Benzinfalle = Fuel Trap
Edited by Alpenflitzer, 08 June 2019 - 02:14 PM.
Posted 09 June 2019 - 03:58 PM
Posted 10 June 2019 - 04:02 PM
Would you expect it to be stuck at 435mv until it gets warm then it’ll suddenly kick into life?
I do have a replacement lambda sensor but looking at the existing it’s a loooong way down there so not easy to get to.
Edited by slayerofcows, 10 June 2019 - 04:03 PM.
Posted 10 June 2019 - 04:09 PM
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