Help me AEU86, you're my only hope

[Nakilad]

(03-22-2021 02:25 AM)jondee86 Wrote:  If you have the car idling in the optimal range and you pull the hose off the MAP sensor
the gauge should move until it is showing rich. That's about all you need to do to check
if the MAP sensor is working.

Cheers... jondee86

I tried this, and all it really does is idle like a sack of s**t. nothing really changes on the gauge. You can see / hear this in the 4th video of the playlist.

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(03-22-2021 10:16 AM)totta Crolla Wrote:  Probably worth checking that your O2 sensor is telling you the truth. It should be showing somewhere between 0 - 1v on your meter. To give a stable output an un-heated sensor relies on high exhaust temperatures and this is typically achieved when the engine is under load. I use a narrowband sensor to feed back to my ecu and a wideband to tune. With both sensors fitted it became obvious that the un-heated narrowband sensor was sending rubbish until it got really hot. Fitting a heated sensor cured this.

So the voltage is normally at .14 volts. Changing the mixture screw has no effect, but you can hear the change in the idle so it is doing something. If I block off the cam breather hose for 30-45 seconds, and then release it, the voltage will shoot up to around .45 (max) and the slowly settle back down to 0.14 again.

I understand what you are getting at here regarding the heat, and it does make sense. I don't think this is the issue but I guess I need to spend another 200-300€ on a wide band sensor and gauge to test this further. As I said earlier, I can't really take it for a long drive without running the risk of getting into a lot of trouble! That said, there is an auto bahn around 3 minutes away so perhaps I should just chance it one evening.