Perplexed, HELP
#27
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On my PFC Commander there is a screen that shows about 16 sensor readings, including the low and high range TPS readings.
If you can find that screen, it is easy enough to see the TPS move through its range when you press the gas pedal. You can do this without the car running.
If you can find that screen, it is easy enough to see the TPS move through its range when you press the gas pedal. You can do this without the car running.
#28
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You may or may not be able to get to these screens on your commander. Warning: There are certain screens you can get to that you do not want to change any of the settings.
Second screen from the top on the right, lines 2&3 in the left column are the tps readings. When you press the gas pedal the reading on line 2 should increase and decrease, whereas the reading on line 3 stays pretty constant. The allowable ranges are in the uSDM FSM.
Sory the pic is hard to read. Its the best I have got atm.
My friend says "never go into the "all data initi, you can accidently delete the map".
Second screen from the top on the right, lines 2&3 in the left column are the tps readings. When you press the gas pedal the reading on line 2 should increase and decrease, whereas the reading on line 3 stays pretty constant. The allowable ranges are in the uSDM FSM.
Sory the pic is hard to read. Its the best I have got atm.
My friend says "never go into the "all data initi, you can accidently delete the map".
Last edited by Redbul; 11-30-23 at 05:41 PM.
#29
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Therer is all kinds of Power FC advise on here. Here is one link I was given before.
It can be bewildering.
https://www.rx7club.com/power-fc-for...roblems-83016/
It can be bewildering.
https://www.rx7club.com/power-fc-for...roblems-83016/
#31
93FD
Thread Starter
On my PFC Commander there is a screen that shows about 16 sensor readings, including the low and high range TPS readings.
If you can find that screen, it is easy enough to see the TPS move through its range when you press the gas pedal. You can do this without the car running.
If you can find that screen, it is easy enough to see the TPS move through its range when you press the gas pedal. You can do this without the car running.
#32
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Its very frustrating I am sure. I went through a long exercise to get my car running again recently, after an apparant simple fuel flooding event.
You just have ot keepplugging away at it.
I keep going back to the TPS because another member found that although his tested OK, it went out of range when the car was hot after a spirited drive.
I don't know if discussion of that particular particularity would come up anywhere on RX7club.
You just have ot keepplugging away at it.
I keep going back to the TPS because another member found that although his tested OK, it went out of range when the car was hot after a spirited drive.
I don't know if discussion of that particular particularity would come up anywhere on RX7club.
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Tom Smith (02-20-24)
#36
93FD
Thread Starter
Update.
I finally switched out the spark plugs. But it didn’t solve the problem. Still choking and dying on me like it’s fuel starved. Guess it’s on to datalogix next.
I finally switched out the spark plugs. But it didn’t solve the problem. Still choking and dying on me like it’s fuel starved. Guess it’s on to datalogix next.
#37
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the guy who does FC Tweak the software just released a new interface box for the PFC, it replaces the Datalogit.
there are lots of reasons why this is good, datalogging is way faster, only 1 piece of software instead of 2, no stupid USB adaptors etc etc
he's not a vendor here, so can't sell it here, but he's active in the google PFC group and i think on Facebook as well
there are lots of reasons why this is good, datalogging is way faster, only 1 piece of software instead of 2, no stupid USB adaptors etc etc
he's not a vendor here, so can't sell it here, but he's active in the google PFC group and i think on Facebook as well
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Tom Smith (02-20-24)
#38
93FD
Thread Starter
So I was playing with my Commander and parked idle vta1 is .44, vta2 is .95
when I step on the throttle vta1 gets to .9, vta2 gets to 2.10 then the engine starts to cut out like when I’m driving. This is new, didn’t happen before.
I cannot accelerate at all without the engine dying, cannot even pull it into the garage because it dies when I hit the gas.
any suggestions with this new info? I’m trying everything and getting nowhere, and my readings have now changed from when I started chasing this rabbit.
when I step on the throttle vta1 gets to .9, vta2 gets to 2.10 then the engine starts to cut out like when I’m driving. This is new, didn’t happen before.
I cannot accelerate at all without the engine dying, cannot even pull it into the garage because it dies when I hit the gas.
any suggestions with this new info? I’m trying everything and getting nowhere, and my readings have now changed from when I started chasing this rabbit.
Last edited by Tom Smith; 02-23-24 at 06:05 PM.
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Tom Smith (02-23-24)
#43
93FD
Thread Starter
I searched the forums and know what the ranges should be, that’s why I’m stumped as to why whenever it hits 2.10 and .9 it starts choking and cutting out. Wasn’t sure if there was anything similar someone else had run into that may shed some light.
2.10 and .9 are way under normal open numbers.
2.10 and .9 are way under normal open numbers.
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Tom Smith (02-23-24)
#45
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ECU relies on the signal from the TPS, eh? If the signal stalls at the low numbers, the ECU gets confused?
So is your TPS faulty?
I.e your throttle is still moving open, but the ecu does not get the news?
The engine is sucking in more air, but the ecu is not increasing injectors flow.
When you are idling in neutral, or with the clutch in, what is your injector duty showing when you rev. up?
So is your TPS faulty?
I.e your throttle is still moving open, but the ecu does not get the news?
The engine is sucking in more air, but the ecu is not increasing injectors flow.
When you are idling in neutral, or with the clutch in, what is your injector duty showing when you rev. up?
Last edited by Redbul; 02-23-24 at 08:49 PM.
#46
93FD
Thread Starter
that makes sense…. Guess it time to borrow one and find out for sure.
#47
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its more important to set the TPS so its correct at a warm/hot idle, or throttle closed.
the PFC uses the TPS to do "Fuel Projected Power Enrichment" basically it uses RPM, throttle opening and the rate of change in the throttle to add enrichment.
it kind of predicts how much more airflow there would be if you stomped on the pedal. it needs the TPS to do that.
the PFC uses the TPS to do "Fuel Projected Power Enrichment" basically it uses RPM, throttle opening and the rate of change in the throttle to add enrichment.
it kind of predicts how much more airflow there would be if you stomped on the pedal. it needs the TPS to do that.
#49
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#50
93FD
Thread Starter
So I’m pretty sure it’s my TPS now. I unplugged the TPS and it didn’t stall out at idle finally. Checked continuity and none of the prongs beeped.
That being said, how the hell do you get the screws to the TPS off? I don’t have a short enough screwdriver to fit back there and cannot even see the bottom screw.
any advice?
So close to being able to drive and Mazda made it impossible to do a simple task yet again.
That being said, how the hell do you get the screws to the TPS off? I don’t have a short enough screwdriver to fit back there and cannot even see the bottom screw.
any advice?
So close to being able to drive and Mazda made it impossible to do a simple task yet again.