After spending ALOT of time putting together an S5 N/A vert for a customer, I'm having more problems....
The car ran perfectly after getting a few of the bugs worked out, then we sent it to get detailed. After coming back looking immaculate, the car floods and runs very rich after being fully warmed up. The check engine light comes on and I've checked the code. It tells me its the AFM (it flashes 8 shorts).

I've changed the AFM with a known working one from a freinds S5 N/A and same deal...runs very bad.

Anyone have any other thoughts?

I've been up all night and am kinda tired...lol

 

Ok so now on a cold start up there are no codes at all and it runs perfectly fine.....until it reaches operating temp, then it starts sputtering and blowing black clouds out the exhaust and flashing 8 short CEL's (which is 08 - Airflow Meter (AFM) - Basic Fuel Injection and fixed timing (Cripple mode) ).

 

paging HAILERS.......

 

Coolant temp sensor for the ECU?

 

Already changed the coolant temp sensor on the back of the water pump, I've tried 3 different AFM's, and a couple TPS's.....grrr lol

 

Any AFM signal modifier's in the 'vert Joe? Or were there ever? (S-AFC etc.)

 

How about one of them sweet eBay chips?

 

LOL no the car has never been modified at all, everything is original.

Still stumped

 

can there be something wrong with the wires?

 

...at least the work environment is immaculate now....lol

Joe, I had a similar situation when I had my Sport Trac detailed before I sold it. Water had gotten into the fuse/relay box and $300 later, it turned out that a bit of water had shorted some connections, which killed a few relays. Looking at the wiring diagram, I'm wondering if perhaps water might have caused a momentary short at the AFM harness, which took out the ECU....almost like a bad metering pump fries the ECU on S5s sometimes. Your thread is a few days old now, so you've probably already done this, but I'd try another ECU.

 

check the vacuum lines, maybe the detailer pulled one off when detailing the motor.

 

Yeah well I kept the known working AFM in the car while doing some tests and now the car works perfectly fine, I can drive it around for 40mins at a time and nothing goes wrong, it runs like a top.
So I'm assuming that the original AFM must have got some moisture or something in it that effected it.