Please help...air intake problems (codes 171,174 ext lean)..
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From: Hockeytown/MotorCity
Please help...air intake problems (codes 171,174 ext lean).. First off I sold my z28 to my buddy stock w/ free mods, then I just sold him my old k&n, whisper lid, MBA maf ends, baker reducer, and home ported TB.
He keeps throwing codes 171 and 174. Also, I took two readings on the scanmaster and they are very inconsistent one was an 906 and next was a 850! both from 20 rolls.
I checked all the clamps and stuff, all tight.
Here is my list of possibilities,
-Old k&n washed alot and barely oiled(filter is white).
However, would it matter prior to MAF?
-The sensor came off my 2000 SS, it saved work swapping ends of both sensors.
However, I thought 98-00 are the same.
What do you guys think it is?
Thanks for your time, Andy
He keeps throwing codes 171 and 174. Also, I took two readings on the scanmaster and they are very inconsistent one was an 906 and next was a 850! both from 20 rolls.
I checked all the clamps and stuff, all tight.
Here is my list of possibilities,
-Old k&n washed alot and barely oiled(filter is white).
However, would it matter prior to MAF?
-The sensor came off my 2000 SS, it saved work swapping ends of both sensors.
However, I thought 98-00 are the same.
What do you guys think it is?
Thanks for your time, Andy
Re: Please help...air intake problems (codes 171,174 ext lean).. lean codes are generally cause by leak between the MAF and intake or a leak in the exhaust. If it is the exhaust it normally shows up on just that side.
You can a little electronics cleaner on the MAF and see if the wires are gunked.
You can a little electronics cleaner on the MAF and see if the wires are gunked.
Thread Starter
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From: Hockeytown/MotorCity
Re: Please help...air intake problems (codes 171,174 ext lean).. Just cleaned the maf with electronics parts cleaner
There is however and exhaust leak...The catback was cut by the axle and re-welded but there is a leak now.
There is however and exhaust leak...The catback was cut by the axle and re-welded but there is a leak now. 
