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CEL from hell/MAF data question (97 850) 850

posted by  Shaughnessy on  Mon Jan 4 12:14 CST 2021
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last visit: Fri Oct 3 23:53 CST 2014
[RELATED]

As I stated in another thread, I have had a p0171 CEL issue recently.

And because of that, I've replaced the plugs, re-routed the vacuum lines to their correct route, cleaned the distributor and rotor, re-connected a loose vacuum line, cleaned the MAF sensor like literally 5 times, and I'm still getting a CEL and (once again) code p0171.

I used the OBD scanner to check the data as the car is running, and my MAF reads about ~4.0 g/s when at idle.

Does anyone know what the normal rate is @ idle? I kind of have found results that suggest that's in the range, but also some that have said otherwise.

I purchased the current MAF in 2019, and maybe have 20K miles on the car.

I have one vacuum line that is original (it's part of the one that I had to re-route because I incorrectly routed originally). I don't know if that is an issue (I will eventually be replacing it, esp if it turns out that IS the issue. HA!)

Side note: the car runs better without the MAF plugged in too. The buildup to the turbo boost seems a little lagging, but nothing too bad.

thanks in advance
--
1985 245. 246K Gone..but not forgotten. Sold in 2013, found 2018! Still running on the road. Of course. 1993 Volvo 850 soon to be gone






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