Why is it lean???

[q92awd]

First, the car is a '92 awd with 2g mas, 550's, new isc, blocked off fiav and rerouted coolant because the spring broke, s-afc, refurbed ecu, and some other stuff but I think that's all that matters.

Now my problem (from watching the 02 and low fuel trims): My car is running very lean at idle, to the tune of +17 on my s-afc at 1k after the car warms up. The o2's seem to start out fine and then start to get more and more lean as the car warms up. If the car is rolling while it's out of gear (coasting to a stop) the rpm are under 1k and the car is rich on the logger but as soon as the car stops it goes to lean again.

Also, today when I was testing some things I had been driving the car but shut it off for about an hour. When I checked to make sure the new isc was working I started the car and it idled fine at 750 rpm. I then turned on the ac and the idle dipped and there was a click from under the hood. This continued until I shut the ac off - the idle would drop and there was a click, repeating about every 2 seconds (sounded like the ac compressor was making the click, at least near that area). After the car idled for a few minutes I tried the ac again and the idle dropped a bit and then caught at about 600 rpm and stayed there. Turned it off and the idle returned to 750rpm.

If you need any other info, just ask. I appreciate the help.

 

[rated x]

Hi everyone.My problem is that my car is running lean.All I know is that when I put my afpr on I noticed my a/f gauge wasn't lighting up like normal at idle.If i set the base pressure around 60psi the lights start to fluctuate back and forth.I do know that the bottom honeycomb for my mafs is missing.Could this cause it to run lean?Or could it be something else?My mods are in my profile.thanks in advance.

 

[Defiant]

Don't try to use an AF gauge for anything other than to fill space in a gauge pod. They have no tuning use.

 

[oldman]

How much boost are you running? I would say stock 450s and the missing honeycomb are probably the cause. Keep the boost down until you have a logger and replace either the honeycomb or the maf.

 

[rated x]

ok i dont know how this happened but it seems to me that i posted this on q92awd's thread.man im sorry. WTF

 

[q92awd]

I'm pretty sure I saw it in its own thread, so I'm at a loss also. Don't worry about it in any case.

Since I read yours, I thought that 60psi for the fpr sounded really high but I don't know if you just put it there as a test or left it set there. I have no experience with it though so take that for what it's worth. I would put all the honeycombs in the mas and go from there personally.

 

[rated x]

ok i still have the fpr set where it supposed to be 43psi.my problem is i dont have the honeycomb.i guess the guy that had the car before me took it off and i dont have it.any suggestions?Oh,still running 15psi of boost.thanks