Uncle_Rico

***UPDATE***

The car is now running and driving. Known issues are:

- AC doesn't work
- Passenger Lock doesn't work
- Fuel and Temp gauges on the dash do not work.
- Broken odometer

Shark2626

..

captainOCD

if I was closer I'd be tempted.

Kiln_Red

With so much 928 knowledge right there in your backyard, it makes no sense to not properly diag it.. possibly get it to a running state.

SteveG

At least post it in the FS thread here.

Uncle_Rico

Update....the car is now running and driving! Turns out it was something as small as cleaning the MAF connection.


Huge shout out to Jason89s4 for volunteering his Sunday morning to come over and help get it running. He quickly found the problem and gave me a lot of tips on how to diagnose any potential future issues. I can't thank him enough.

Jason89s4

My pleasure Wes....no better way to start a Sunday than getting a 928 back on the road!
Wes has a very pretty silver S3 w/ burgundy interior, and big props to him as he has changed the timing belt and all underhood fuel lines. With a bit more tuning this OB will be a good looking daily driver.

For those with interest in the diagnosis and cure (and future readers):
Symptom: Car cranks and will fire and run for about one second, maybe two.
Analysis/Solution:
1. Is there gas? We weren't sure on gas status since fuel gauge was not reliable, so we added four gallons of sweet Texas 93 octane.
2. Is there fuel flow and pressure? Attached jumper toggle switch to sockets 87 and 30 on fuel pump relay socket. (# XX on this 85). Attached fuel pressure gauge to test port on fuel rail. (Wes is missing his ball bearing!). Confirmed pump was good and pressure was around 3 bar. Turned off pump and residual pressure held for several minutes.
3. With me at the front of the car feathering the throttle, and Wes cranking, after several attempts we could get it to run, very rough, by feathering the throttle around 1/3 open. It would not hold idle.
4. We decided to swap out the MAF with one I brought, and in the process noticed how dirty--no, gunky the connection to the MAF was. We went heavy on the DeOxit D5 spray on both connectors. Restarted the car and after same waking up/warming up (it had been asleep for a year!) it held idle.
5. Removed fuel pump jumper and reinstalled relay. Re-test and the car started and purred like a kitten.
6. Test drove around the block. Needs some tuning, but its back on the road again!

Below is a pic of the "928 resuscitation kit" I packed with my other tools before the cross-DFW trip to Wes. Turns out thing only thing we actually would need is the DeOxit!
-Jason

jetson8859

Congrats guys! That's what makes this forum so valuable! I would not own the 4 that I do without this forum! Always great feeling to hear your car start and run after an extended time!

Mrmerlin

good going Jason,
I dont think I know who you are,
but I do hope to meet you someday.
The Texas group has a lot of good wrenches,
and a spectacular parts man