Haltech glitch or cold tuning issue?

Hey all,

So my 308's doing something a little wierd when it's warming up.

When the oil and water have just gotten warm (say 170 on the water and 160 oil), when I nail it, it'll pull real good then all of a sudden just shuts off . . . if I turn the key on and off while it's still rolling it starts back up immediately.

I've captured the event on both my wideband A/F meter and in the Haltech ECU and I can't see anything strange . . . thought I was going to see it losing trigger pulse or the ECU shutting off but no . . . still reading engine rpm, injector pulse, map etc.

I now have about 30 hours on the new motor and I never have this problem when it's completely warm/hot.

Last night I think I got more info also . . . I coasted to a stop when it shut down so I could listen for the fuel pump running . . . it was. When I went to start it, it seemed really flooded, so this led me to think it's something to do with the ignition may not be firing the mixture when it's cold due to less atomization, etc.??????? A/F was around 11 (from memory) when I captured the event . . . then it went full lean during the shut down which I think is what the meters do when there's no combustion period . . . or should it show rich?

Also, it "seems" like since I boosted the octane the problem seems more consistent, as in I can get it to shut off when not completely hot . . . seemed like on regular pump gas it was hit and miss but with the slight pinging I was getting I may not have been driving it the same.

Do you think it's possible that the fuel is drowning the spark plugs when the engine is not completely warmed up . . . only what's a little wiered to me is it fires immediately when I toggle the ignition, but I thought this could be because when I turn the key off, there's zero fuel being injected so it dries the plugs????? I guess the other thing I could do to verify this is enable the fuel shut off during decel which would theoretically do the same thing.

Might have to take a spark plug socket with me on my next test drive and pull a plug when it shuts down to see if it's wet . . .

Thanks all for suggestions and input.

Sean

 

Thanks, here's some more info . . . I'm running both dizzys . . . it's wierd that both banks are dieing . . . maybe I need to confirm I am loosing spark . . . and then if that is the case, I can determine if it's the igniter.

I went for a two hour early morning romp . . . did not miss a beat once it was warmed up, but when I nailed it when it was just barely warmed up, problem occured. I would of thought if it were a loose connection, problem would have happened at least once . . . it just never happens hot.

Also, the problem never occurs at the initial snap . . . always after it's been pulling for a couple seconds like it just ran out of fuel . . . maybe at or near the torque peak???? . . . but it's never back fired and based on what happened yesteray, I think it is getting fuel.

I guess the "momentary" spark plug fouling of all 8 cylinders just doesn't make any sense, so I think I'll figure out some way of telling if I'm loosing spark on the fly . . .

Sean

 

Thanks for responding!!!

Turns out one of the U.S. Haltech rep's is just about 10 miles away from me!!!! I called him and he said he thinks it's a firmware problem . . . drove down there and he updated it for me . . . not gone for a test drive yet but hopefully this solves it.


Thanks again,

Sean

 

To be continued . . . hopefully pickup new ECU tomorrow