HighFlight2k2
New Member
Ok. I did some side by side comparisons and I've uploaded two images of the data. The left log is the port engine and the right the starboard. The file named NoSpool file is when the issue happens and at WOT, it won't spool up. The Spool file is another point in the same log file where the engine did, for a short time, spool up.
The first thing that struck me is that first off, the IAC values on the SB engine at high throttle is always stuck at 150. I assume that is one of its detents. I'm not sure, however, if that is open or closed. When the coolant sensor had a low value (cold engine) and at idle, the IAC value was in the 70's. The IAC equates to choke right?
The second thing that struck me is the BPW (which I assume is the injector base pulse width...amount of fuel). When the engine spooled, the value was noticeably higher than when it didn't. That supports the behavior I see. When the throttles are mashed and it doesn't spool up, the engine noise most definitely is higher...like the intake is opening and it wants to go but is being held back...not getting the fuel it needs.
Lastly, the GPH is higher when it did spool up. The BPW was higher on the SB at that time. That would be a rich condition right? Would that explain the slightly less RPMs?
So does this point to the problem? If so, what do you think the causes could be? It looks like the computer is not doing what it is supposed to be doing. What would cause it to act this way?
Thanks for any input.
Jon
The first thing that struck me is that first off, the IAC values on the SB engine at high throttle is always stuck at 150. I assume that is one of its detents. I'm not sure, however, if that is open or closed. When the coolant sensor had a low value (cold engine) and at idle, the IAC value was in the 70's. The IAC equates to choke right?
The second thing that struck me is the BPW (which I assume is the injector base pulse width...amount of fuel). When the engine spooled, the value was noticeably higher than when it didn't. That supports the behavior I see. When the throttles are mashed and it doesn't spool up, the engine noise most definitely is higher...like the intake is opening and it wants to go but is being held back...not getting the fuel it needs.
Lastly, the GPH is higher when it did spool up. The BPW was higher on the SB at that time. That would be a rich condition right? Would that explain the slightly less RPMs?
So does this point to the problem? If so, what do you think the causes could be? It looks like the computer is not doing what it is supposed to be doing. What would cause it to act this way?
Thanks for any input.
Jon
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