Cheap ebay disco smoke machine?

 

Found a cheap smoke machine on Ebay for $50. It's a VW diesel...

 

Have you tried cleaning the MAF? The oiled filter elements tend to get the MAF dirty...

Also, how old is the O2 sensor? Even though the DME doesn't read it at WOT, it still affects cruise readings.

 

maf is brand new earlier this year. came with dry filter. New O2 sensor a few months ago . Didn't fix issue.

 

Worth more than some cars

http://redlinedetection.com/

 

How about the FQS setting? Which MAF do you have? I tried running a M-Tune on the fourth setting and it ran so lean while cruising that it started jerking (16-17:1). It smoothed out on the first setting.

Does it run super rich as soon as you get into boost, or is it still lean?

Once, I had a 944 that really leaned out after 30 minutes of driving. I'd pull into the garage the next morning, check the fuel pressure, and it was perfect. After blowing a headgasket, I left the fuel gauge on the car and walked away with the car running. I couldn't believe that the pressure dropped to 15 psi.... A new fuel pump solved the issue.

 

well, I am happy but confundled a bit. couldn't find any leaks with the smoke detector. I pulled a separate vacuum line to see if smoke would pour out and it did. was disappointed to not find anything. decided to move the fqs from stock to position #1 which ads 3% fuel. Car idles wonderfully with 14.7 dithering afr and everything is good. don't understand how everything went bad after a first time WOT run since putting the new maf. happy boy though.. I think I will keep her.

 

let me retract my previous post regard happy boy. with FQS at #1 I am hitting afr of 11's at 5psi and into 10's at 15psi. not good.

 

I disconnected each injector clip one at a time when the car was running and the idle change when disconnecting each injector. Just used a pyrometer on each of the exhaust manifold flanges and the one closest to front of car was near 100 degrees cooler than the rest while the car was idling while warmed up.

 

That's a big delta in temps. That's where I would start. You want to determine why #1 is cooler. Try the followings, till you figure out the cause:

- swap injectors between #1 and and any other cyl. See if cooler temps follow injector.
- swap spark plugs.
- try a different plug wire on #1
- this may be tough, see if you can swap injector connector between #1 & #2.
- may be a good idea to look at your distributor...

 

Have you checked the o ring on the throttle screw on top of the throttle body?

 

sounds about like the direction I am going in John. Just swapped #1 and #2 injectors. will see what results I have tomorrow.

 

Did all this except cutting and swapping the injector connector. #1 is still much less hot. looking at the distributor cap the contacts 2,3,and 4 all look the same and #1 does look a bit different, but other than that there are no cracks or broken bits. same goes for the rotor.