something has happened with fuel supply

[miniman]

Hello.

I have been runnign my 350tpi with ms11 for a couple of years and it has been working nicely. All of the sudden after being parked for about a month it gets way too much fuel and the pulsewidth is in the reds all the time while running. The strangee thing is that i get a pulsewdith and a ego reading with the engine turned off, not right???

i have included a screendump from tunerstudio with ignition on and engine not started

dump.jpg

[kjones6039]

I think an msq and log would be more helpful.

Ken

[miniman]

Hello.

I have added the current msq. I can´t get a log as it runs so rich that it´s impossible to drive. I tried an older msq that i know did work but with the same result. I think it´s most likely some hardware problem with the ms11.

Regards

Anders

[kjones6039]

Hello.

I have added the current msq. I can´t get a log as it runs so rich that it´s impossible to drive. I tried an older msq that i know did work but with the same result. I think it´s most likely some hardware problem with the ms11.

Regards

Anders

You don't necessarily need to drive the car to get a meaningful log. A log of starting and running would at least be of some help.

Since your ReqFuel is -21 I am assuming 19# injectors ala 305 sbc....... Is that correct?

Ken

[miniman]

I have stock tpi 22 lbs injectors. I can try to get a log while starting the car. I do not believe jhe problem is in the msq as i tried several with the same result. Do you know if i should get at pulsewidth reading and ego reading with the engine off /just ignition on) ? I don´t think thats correct.

regards

Anders

[trakkies]

IIRC, mine reads very lean at switch on. But the O2 sensor shouldn't have any effect at start or low engine speeds anyway.

It's interesting that your pic says (** v2.90E embedded code by B&G**) on the top of the TS page - mine gives the project name.

[miniman]

Hello again.

I couldn´t get the car started so a had a guy very experianced in building MS controllers check it and he hasn´t found anything wrong with the box. I changed sparkplugs as they where severly flooded and it started again but runs just as rich as before. I have included a logfile from this startup.

Regards

Anders

[Matt Cramer]

What are you using for an O2 sensor?

It seems like it's landed in a cell where it has a lot of pulse width; that cell may need to be leaned out.

And that's a lot of acceleration enrichment being pumped in.

[miniman]

Hello.

I use a Innovate LC1. I get exactly the same result when i try the tune from your TBI conversion wich is the one i started with some years ago but i have never had this problem before.

Anders