Car Starts! Dies after 3 sec

Sodaguard · Post by **Sodaguard** » Wed Aug 16, 2006 4:09 pm

ms1 v2.2 Msns-Edis, 91 vw Corrado G60.

Cranks good, starts good, dies all of a sudden after 3 seconds. played with the tuning, either way I go, more or less fuel does the same thing. More or less timing, same thing.

Any Ideas?

Thank You,

Phil

MSQ Attached

BSVW8VT · Post by **BSVW8VT** » Thu Aug 17, 2006 7:36 am

Are you using the Stock Fuel Pump Relay?

Sodaguard · Post by **Sodaguard** » Thu Aug 17, 2006 7:18 pm

Yes, the stock ecu is still controlling the fuel pump.

But, thats not the problem. I jumped the fuel pump strait to the battery and it changed nothing.

Sodaguard · Post by **Sodaguard** » Thu Aug 17, 2006 7:58 pm

draco12369 wrote:I got it to run again all i did was reflash the firmware to the megasquirt and ran from the map that came with the firmware, then fine tuned it from there. Hope that helps solve your problem

Thanks, Draco12369! I'll give it a shot

Sodaguard · Post by **Sodaguard** » Fri Aug 18, 2006 8:36 am

Tried it, same thing.

BSVW8VT · Post by **BSVW8VT** » Fri Aug 18, 2006 9:13 am

Yes, the stock ecu is still controlling the fuel pump.

But, thats not the problem. I jumped the fuel pump strait to the battery and it changed nothing.

Alright, I was asking because I ran into problems there with the fuel pump relay since it needs to see rpm and without the stock coil there was no rpm going to the relay.

My car would start only on the primp pulse and die 3 seconds after starting. Can you get use a datalog from when you try starting it!

diegom6 · Post by **diegom6** » Fri Aug 18, 2006 5:27 pm

Sorry, but it happens when it's cold or whenever condition is it?

Sodaguard · Post by **Sodaguard** » Fri Aug 18, 2006 6:00 pm

Haven't tested it in any other condition other than about 80 deg farenheit with high humidity

PSIG · Post by **PSIG** » Fri Aug 18, 2006 8:35 pm

Hey Phil,

What are you using for fast idle? Your FIdle threshold is only 40Â°F?
I would suggest turning EGO control off by setting the step size to zero for now.
Are you running EDIS? Is your SAW wire disconnected and verified 10Â°BTC?
MAPdot AE is fine but perhaps disable or switch to TPSdot for troubleshooting purposes.

Please post a log of the start attempts from before power-on.

David

Sodaguard · Post by **Sodaguard** » Tue Aug 22, 2006 1:38 pm

For fast idle I'm using the stock fast idle valve on the intake manifold.
Yes running EDIS. Not verified cuz VW's have the worst timing setup.
It does start, and runs strong for a couple seconds so if the timing was off I would think it would just run bad or weak.