psychotic7

OK...my friend just got a s4 TII and it cranks right up but will not stay running. it dies after like 3 seconds. we replaced the fuel pump, checked the main relay, adjusted the TPS and switched the MAF sensor with mine which runs perfect and still the same thing. any ideas?

jmkogut

TBH, it sounds entirely like the AFM to me.. Make sure the harness isn't a failtrain.

RotaryRocket88

iTrader: (7)

Have you tested the fuel pump resistor/relay? A bad one can cause the motor to die right after start up.

HAILERS

Jumper the fuel pump check connector and try again. IF you have the same results, it MIGHT be a air leak. Like a brake booster line off, one of the BAC hose ends off, the turbo intake duct off at the turbo or with a large crack in it.

That's what it usually is if the thing starts up and revs to about two grand and then dies. But if you floor the pedal it will seem to try to keep running. But the air leak is too big.

Or the electrical plug might just be off the afm.

psychotic7

we took the UIM off and fixed all vac leaks and everything is hooked up....triple checked. yes it does tend to try to stay running if i pump the living hell outta the gas pedal. his harness is shot to hell...it has frays all in it but he failed to tell me that it ran perfect until a spade connector(two wire that is just hanging there) by the t-stat housing touched the UIM and sparked then the car died and now wont stay running. as for the AFM....i hooked mine up in his and it did the same stuff and i hooked his up in mine and it cranked right up

psychotic7

Also all fuses are good

HAILERS

What are the wire colors on that spade connector that sparked? Like Black with white stripe etc.

psychotic7

man its wierd...on the spade connector just hanging they look to be black with a white stripe on both....the one hooked on the temp sensor is black with a red stripe. im tryin to compare all his wires and stuff to mine but its hard because all my stuff is jspec so its different

HAILERS

Black/white on a series four USUALLY means its a power wire fed from the Main Relay fed by a EGI fuse. Most of the black/white wires on a USA series four are for feeding the solenoids on the vacuum rack and also the two solenoids on the ACV.

None of those items will cause your problem unless the EGI fuse blows up.

Red/Black on the water thermo sensor sounds ALL wrong for a USA car. Yours is not USA so who knows.

psychotic7

nonono....sorry. the car being workded on is US spec, mine is jspec. my wire colors are different and i dont have half the vaccum nipples and emissions crap as he does. what i dont get is there is nothing else on aroung the tstat housing that uses another spade connection...maybe i can post a vid of the car later

HAILERS

There's a Green/Black wire that goes to a temp sensor on top of the thermostat housing that is meant for the small electrical fan on Some cars. It's a gnd wire if memory serves.

Around that area, are the connectors for the two solenoids on the ACV. The ACV has pigtail wires about a foot or more in length and they connect with plugs near the water thermostat housing. Two of those wires are black/white. Power wires.

I kinda remember the Air Supply Valve connector having two Black/White wires, but that item is on the back of the engine. None of those items effects starting unless the EGI fuse that feeds the b/w wire is blown.

HAILERS

I'm really saying that if a Black/White wire is *sparked* then you blew the EGI fuse that feeds it. The Black/White wire also powers the ECU on pin 3J. No power on 3J equals a non staring car.

psychotic7

Here's a pic of the wires....t-stat is black/red and the other connector is two black/white wires



Here is the video
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psychotic7

As you can see it cranks right up every time....hopefully the vid can help narrow it down. please let me know if it will help to take more pics or video

J's fc

iTrader: (1)

Hey i had that same issue and the problem was that, when i changed the fuel pump i left a little orange spacer that goes in between the fuel pump and the fuel pump assembly is starts but the it dies because the car does not have enough fuel.

psychotic7

pulled the walboro back out today to double check everything and it was all good....im freakin stumped

polito Racing

iTrader: (1)

hey man is there a chance that you could take another video without your car idling next to it. its really hard to hear it with your car on the background. however have you done a compression check on this car? for the little i could hear it sounded like it is only running in one rotor. if compression is test comes out good verify youre getting fuel and spark to both rotors. ill subscribe to the thread to try to help.

good luck.

HAILERS

The black/white WERE in electrical plugs and someone has chunked the elect plug itself. Same with the Black/red. The Black/Red is the output of the ECU to the Port Air solenoid. One of the Black/White was at one time in the same plug. I'm saying that there was a plug with a black/white and black/red wires, and it at one time connected to the plug from the Port Air Solenoid.

The other black/white is supposed to be paired with a White wire and goes it's connector is also missing I suppose. It was to connect to the pigtail plug from the Split air solenoid.