TPS tip in enrichment might help. Timing transitions play a big role at take off from my experimenting. I've noticed a few degrees can make or break the starts on my car. Im a 5spd though so manuals may load the engine a bit more in this area. You might take a look at the timing maps 3P has posted in his ecu thread. Take note of the rate of change in the low rpm regions and see how your tuners match up.
Last time I looked at the AEM to AFM table, it was designed to simply set two points and extrapolate between them for load vs hz. This will not work to well with a karman vortex street sensor. Its not a linear output and will require additional correction at low/mid/hi ranges to be accurate. No easy feat with out knowing the sensors measured output vs velocity and cross section.[/QUOTE
supraguy@aol;1963323 said:
The fuel relay mod is to remove the 9-12volt jump in fuel pump voltage, and provide it a constant 12volts.
I don't know about the AEM, but it may or may not delete this function.
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adampecush;1963178 said:
FWIW, I have the AEM box and no flat spot. The tuner should be able to tune accordingly as there are several tables that can be fine tuned to adjust throttle response.
Are you still on the AFM, or have you gone MAP? I would think MAP would give you a faster response to throttle-related airflow/pressure changes than the AFM. Also be aware that the AEM only reads absolute throttle position, it does not read an initial throttle opening signal like the toyota ECU does.
3p141592654;1963072 said:
Whenever the ECU detects a throttle transient above a certain value it will fire all 6 injectors at once. It can do this midflight, so that even if a bank is on at the time it will still fire the others. Just one of many drivability tweaks in the stock ecu.
Doesn't know if the AEM can do this
Somewhere on another site,there was Talk of a possible fault with the TPS,,that on part throttle openings of 25/30%,,,,,it doesn't send out the correct Signal ???
Someone else said it sounded like an Air problem,,,maybe a Vacuum pipe not airtight ???
I don't know if any of these quotes will be of any value,,and if amongst them there is a clue to what's Happening,,as I don't know,,I'd just love to get to the bottom of that silly little problem.
once through that hesitancy,she flies !!!!,,and the Normal driving is fine,,,which would also suggest the TPS is ok on the part throttle,,as in town it's fine,and that would be a part throttle scenario.,
I know you spent a fair bit of time trying to eliminate that flat spot,to no avail,,and just wondered if you'd put down a few Lines of where abouts in the Mapping you looked at,,so I can post to the guys there,,??,,They may be able to Narrow down the problem,,there are some really High powered AEM mkiii's on the Site,,with no hesitancy reported,,so there has to be a cure,either in The Map,or It may be A fault in one of the Sensors.
Cheers,Terry
Sent from my iPad
I put some ideas to Colin,he was with a customer at the time,so was busy,but here is his initial response,,I'm hoping he is going to get time to look at the Quotes ect,
