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Car Starts! Dies after 3 sec
Posted: Wed Aug 16, 2006 4:09 pm
by Sodaguard
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
Posted: Thu Aug 17, 2006 7:36 am
by BSVW8VT
Are you using the Stock Fuel Pump Relay?
Posted: Thu Aug 17, 2006 7:18 pm
by Sodaguard
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.
Posted: Thu Aug 17, 2006 7:58 pm
by Sodaguard
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
Posted: Fri Aug 18, 2006 8:36 am
by Sodaguard
Tried it, same thing.
Posted: Fri Aug 18, 2006 9:13 am
by BSVW8VT
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!
Posted: Fri Aug 18, 2006 5:27 pm
by diegom6
Sorry, but it happens when it's cold or whenever condition is it?
Posted: Fri Aug 18, 2006 6:00 pm
by Sodaguard
Haven't tested it in any other condition other than about 80 deg farenheit with high humidity
Posted: Fri Aug 18, 2006 8:35 pm
by PSIG
Hey Phil,
What are you using for fast idle? Your FIdle threshold is only 40°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 10°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
Posted: Tue Aug 22, 2006 1:38 pm
by Sodaguard
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.