'87 5000 tqa check engine light = code 2322 = intake air sensor = questions

[Alex Kowalski]

It definitely sounds like the IAT sensor is having a problem.  The sensor is used by the ECU to control boost through the wastegate frequency valve system.   If the sensor isn't working properly, neither is the boost control system.

Scott Mockry has a good write-up on it, including pictures and testing procedure:

http://www.sjmautotechnik.com/trouble_shooting/boost.html#air
http://www.sjmautotechnik.com/trouble_shooting/10vcoolt.html#airt

Good luck, hope that solves it!  If it doesn't, take a gander at his 10v Turbo troubleshooting checklist, under Diagnostics > Troubleshooting Tips

Alex Kowalski
'87 5KCSTQ


> Message: 1
> Date: Tue, 22 Feb 2005 08:11:58 -0600
> From: tom winter <tom at freeskier.com>
> Subject: '87 5000 tqa check engine light = code 2322 = intake air
> 	sensor =	questions
> To: <quattro at audifans.com>
> Message-ID: <BE4099CE.5F89%tom at freeskier.com>
> Content-Type: text/plain; charset="US-ASCII"
> 
> Hi all - Subject line says it all. The problem is I'm on the road and don't
> have my Bentley manuals with me.
> 
> Check engine light only comes on at about 1.1 bar and goes off if I take my
> foot off the gas or go lightly on it. The car is chipped, pulls 1.9 bar and
> if I hammer on it, I sometimes feel a slight bogging down or lagging after
> the "check" light goes on (1.1 to 1.2 bar). Other than that, the car drives
> and runs well. I only have the problem under load and only if I'm aggressive
> on the gas pedal.
> 
> Pulled the codes, got 2322, "intake air sensor bad" or "intake air sensor
> wiring defective." (I happen to keep a print-out of codes in the glovebox,
> so the missing Bentley didn't slow me down here).
> 
> Do my symptoms sound like a bad intake air sensor? Where is this sensor?
> (LOL!). Should I stop driving immediately until I fix it or just drive like
> my mom, nice and easy?
> 
> I'm going to make some calls to check on prices for this part.
> 
> In the meantime, thanks in advance for all your help and advice.
> 
> Tom