anyone have an AFM for a 951? I'm reaching the end of my rope with this bad gas mileage thing, and it's really the only other thing I can think of that's going bad (gas mileage has slowly gotten even worse)

 

I have a couple, shoot me a PM.

 

You can refresh your AFM by doing this:

Genikz did this on his with good success. I have just done my NA spare but have yet to install it.

Full write up on Clark's: http://www.clarks-garage.com/index.htm

AFM Cleaning and Repair

Sometimes erratic operation of the AFM can be caused by dirty contacts, dirty conducting strip, or due to grooves worn in the AFM potentiometer conducting strip. This section covers cleaning the AFM and changing the position of the AFM wiper to correct erratic operation.

1. With the AFM cover removed (see preceding sections), clean the AFM potentiometer conducting strip using a pencil eraser. Work carefully and don't be to aggressive when using the eraser.
2. Clean the contacts on the bottom of the wiper arm (see picture below) using emery cloth or fine grit sandpaper (400 grit). The best way to do this is to disassemble the AFM enough to remove the wiper arm. If you don't feel comfortable disassembling the AFM, you can clean the wiper arm in place. However, you need to insert a sheet of paper between the wiper arm and the conducting strip first. Then clean the contacts by inserting the sandpaper or emery cloth between the paper and the contacts on the bottom side of the wiper arm. The paper serves to protect the conducting strip while cleaning the wiper arm contacts.

3. Now that you've cleaned the AFM, it's a good idea to test it again to see if the cleaning has corrected the problem with erratic operation. If it does not correct the problem, and it's obvious that there are deep grooves in the potentiometer conducting strip, adjust the wiper arm position as described in the following step.
4. Place a piece of paper between the wiper arm and the potentiometer conducting strip. Change the position of the wiper arm by pushing down on both sides of the back part of the wiper arm (see arrows in picture below) to bend the arm slightly. This effectively shortens the arm such that the contacts on the bottom side of the arm will ride on a different (ungrooved) part of the conducting strip.

5. Test the AFM as described in previous sections to determine if erratic operation is corrected. If not, the AFM should be replaced.

 

man, i'm gonna have to go to radio shack on the way home....

 

I have a 91K spare AFM you can try out before buying one if you want. For some reason I don't think a poorly tracked wiper arm is causing your bad mileage, it will cause running poorly at certain rpms and dead spots in the throttle response though.

 

time for a MAF?

 

How about your 02 sensor/cat?

 

You haven't talked with your homie with the mostest, Lart?

 

no cat, i'm thinking about getting the 02 sensor tested again, but like i said, it tested perfect when it was new and i was still getting horrendous gas mileage.

no visible gas leaks, this last fillup i got 160 miles to 18 gallons.

I am developing some kind of crack on the #4 (closest to the rear of the engine bay) header though. stinks something horrible.


Steve- i was just gonna ask if anyone local had one i could "test" to see if it was bad.

I have one of those AFR/Injector Load monitors, and when i disconnect the 02 sensor, it goes to full rich, when it's plugged in, it sweeps like normal.

i went a full tank with the 02 disconnected and it made 0 difference. which would make me want to replace it if it didnt test as good.

 

i thought he got a 928 for christmas and stopped driving 951's.


besides, he's awful sore at me for that last gang war we had.

 

Keep Lart out of it. Soon as you buy a part from him he's in your driveway with a Sawzall and a death certificate for your car. You can come by an borrow it for testing. Just let me know. I was going to rebuild it for the silver car. I have a couple laying around here.

 

how's saturday?

i'll probably suck a tank going out there.

 

Works for me

 

i'll give you a ring before i head over.

either that, or you'll hear me coming off the freeway.



10-ish?