Something is ****ed. There’s no way your map should be 65-70 idling. Then it hits90?? Your map sensor calibration is jacked or its bad. Maybe bad grounding i dont know. Something doesnt seem right
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
LSX454 swapped 95 BASS burb.
- Thread starter shady
- Start date
Little lower, little cooler, bigger sounds.
Old engine had better idle vacuum, but didn't change this.
At that same time that the vacuum is heading to 90, the IAC is cranking open to 50 or better. So the vacuum WOULD drop.
As was mentioned above, there's definitely a cause and effect going on, and I think it's going to take some very fine line looking at times in a data log to see which thing is happening first.
I was starting to do that with the logs I took last year when my plugged in laptop started getting pissy about a dead battery.
So I put it away for now and looked up a new battery that I have to order today.
At that same time that the vacuum is heading to 90, the IAC is cranking open to 50 or better. So the vacuum WOULD drop.
As was mentioned above, there's definitely a cause and effect going on, and I think it's going to take some very fine line looking at times in a data log to see which thing is happening first.
I was starting to do that with the logs I took last year when my plugged in laptop started getting pissy about a dead battery.
So I put it away for now and looked up a new battery that I have to order today.
I think vacuum is approaching atmospheric because the throttle is opening while the engine is stalling. At 0RPM it will be ~95. I don't think the AFR reading really means anything in this condition. If it's misfiring, that extra oxygen will show as rich. Even a WBO2 doesn't measure AFR. It measures how much oxygen is needed to get a stoich reading from the cell. You could look at the injector pulsewidth to see if the amount of fuel is actually changing.
Didn't we establish that this thing doesn't have an IAC valve, it's doing it with the TBW? It means something that you have to keep messing with the throttle stop.
Didn't we establish that this thing doesn't have an IAC valve, it's doing it with the TBW? It means something that you have to keep messing with the throttle stop.
It's DBC. So does have an IAC.
Theres a clear impression of the bottom of the adjustment screw on the pad it stops against.
So I think that part is just settling in.
Like mentioned, even when it's set to 8-10% IAC as they suggest, it still does it.
I went through a period with the last engine where I was pissed at the IAC and just opened my TB blade far enough that it idled about 1050ish, and the IAC was doing basically nothing. And it still died out coming to stops.
That time frame was where I first investigated the idea of the TC not unlocking. And went through the steps to verify that wasn't it.
One thing that HAS changed for the better and it came from changing the idle spark settings, was that it used to die 50-60% of the time, just putting it in gear at an idle.
I did get it to quit doing that.
Theres a clear impression of the bottom of the adjustment screw on the pad it stops against.
So I think that part is just settling in.
Like mentioned, even when it's set to 8-10% IAC as they suggest, it still does it.
I went through a period with the last engine where I was pissed at the IAC and just opened my TB blade far enough that it idled about 1050ish, and the IAC was doing basically nothing. And it still died out coming to stops.
That time frame was where I first investigated the idea of the TC not unlocking. And went through the steps to verify that wasn't it.
One thing that HAS changed for the better and it came from changing the idle spark settings, was that it used to die 50-60% of the time, just putting it in gear at an idle.
I did get it to quit doing that.
