Rtek Help with a Log please
03-28-07, 12:06 PM
#2
I am getting the same problem.. bucks/hesitates while cruising, but runs fine in closed loop?
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/hesitation-stumbling-lean-open-loop-injectors-637037/
i made a log, i will post tonight. im not sure if i have a log of when it worked right though. I think HAILERS is seeing the same thing, he posted the same problem on the teamfc3s forum
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/hesitation-stumbling-lean-open-loop-injectors-637037/
i made a log, i will post tonight. im not sure if i have a log of when it worked right though. I think HAILERS is seeing the same thing, he posted the same problem on the teamfc3s forum
Last edited by gxl90rx7; 03-28-07 at 12:12 PM.
03-28-07, 04:15 PM
#6
logs
Ok, 2 logs i made driving to work:
(for the wideband log: 0v=9.8, 5v=19.8)
3_27_07-7_28_34_-_RX7L.PDB
I forgot to log TPS in this one, but the hesitation occurs at 3 seconds into the log. It drove perfect the rest of the log. You can see it go into closed loop several times, but during the hesitation, AFR is in the 18's. The AFR's get really high in other spots too, but i think that's decel fuel cut (boost is -20)
3_27_07-19_01_02_-_RX7L.PDB
I logged TPS this time, look for spots where the AFR is >15 and TPS >24. Hesitation occurs at 0:04, 0:41, 0:47, 0:54, and 1:00. I believe all teh other AFR spikes are decel fuel cut (TPS is 24)
in the spots where its hesitating, it looks like the injector d/c is increasing, yet AFR is increasing, which makes me think it was the injectors. I was about to pull my new RC 750's and put the stockers back in until i heard you are having teh same problem.. could it be the rtek??
(for the wideband log: 0v=9.8, 5v=19.8)
3_27_07-7_28_34_-_RX7L.PDB
I forgot to log TPS in this one, but the hesitation occurs at 3 seconds into the log. It drove perfect the rest of the log. You can see it go into closed loop several times, but during the hesitation, AFR is in the 18's. The AFR's get really high in other spots too, but i think that's decel fuel cut (boost is -20)
3_27_07-19_01_02_-_RX7L.PDB
I logged TPS this time, look for spots where the AFR is >15 and TPS >24. Hesitation occurs at 0:04, 0:41, 0:47, 0:54, and 1:00. I believe all teh other AFR spikes are decel fuel cut (TPS is 24)
in the spots where its hesitating, it looks like the injector d/c is increasing, yet AFR is increasing, which makes me think it was the injectors. I was about to pull my new RC 750's and put the stockers back in until i heard you are having teh same problem.. could it be the rtek??
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04-03-07, 01:11 AM
#11
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Factory would be 20% +/- a couple (I don't recall off hand exactly) 24% is a little on the high side but shouldn't be causing what your seeing. Regarding logs:
gxl90rx7:
I see what your saying. Particularly at the 47s mark. AFRs go way lean. The odd thing is that you can see that the airflow and IPW do not diverge over this period (their ratios stay pretty constant), so it would seem that the ECU is seeing reasonable airflow, IPW is reasonable yet AFRs change dramatically. Since you have hesitation, its not air injection into the exhaust which leaves fuel starvation during that period as the most likely candidate. So:
- what kind of injectors do you have for primaries? Sounds like 750's?
- last time fuel filter was changed?
- what kind of WBO2 are you using
- what injector config are you using
Wankler:
- can you capture a log with airflow readings? I can see your IPWs changing with the WBO2 reading, I can't tell if the airflow is also changing during this period.
- what are you using for primaries?
- what injector config are you using
-Henrik
gxl90rx7:
I see what your saying. Particularly at the 47s mark. AFRs go way lean. The odd thing is that you can see that the airflow and IPW do not diverge over this period (their ratios stay pretty constant), so it would seem that the ECU is seeing reasonable airflow, IPW is reasonable yet AFRs change dramatically. Since you have hesitation, its not air injection into the exhaust which leaves fuel starvation during that period as the most likely candidate. So:
- what kind of injectors do you have for primaries? Sounds like 750's?
- last time fuel filter was changed?
- what kind of WBO2 are you using
- what injector config are you using
Wankler:
- can you capture a log with airflow readings? I can see your IPWs changing with the WBO2 reading, I can't tell if the airflow is also changing during this period.
- what are you using for primaries?
- what injector config are you using
-Henrik
04-03-07, 08:38 AM
#12
Originally Posted by Henrik
gxl90rx7:
I see what your saying. Particularly at the 47s mark. AFRs go way lean. The odd thing is that you can see that the airflow and IPW do not diverge over this period (their ratios stay pretty constant), so it would seem that the ECU is seeing reasonable airflow, IPW is reasonable yet AFRs change dramatically. Since you have hesitation, its not air injection into the exhaust which leaves fuel starvation during that period as the most likely candidate. So:
- what kind of injectors do you have for primaries? Sounds like 750's?
- last time fuel filter was changed?
- what kind of WBO2 are you using
- what injector config are you using
I see what your saying. Particularly at the 47s mark. AFRs go way lean. The odd thing is that you can see that the airflow and IPW do not diverge over this period (their ratios stay pretty constant), so it would seem that the ECU is seeing reasonable airflow, IPW is reasonable yet AFRs change dramatically. Since you have hesitation, its not air injection into the exhaust which leaves fuel starvation during that period as the most likely candidate. So:
- what kind of injectors do you have for primaries? Sounds like 750's?
- last time fuel filter was changed?
- what kind of WBO2 are you using
- what injector config are you using
04-03-07, 11:22 AM
#14
Here is a log. I did notice this morning on my way in, my LM1 WB went on the fritz. I was not reading A/F, and the car was not bucking. I shut off the car, and it reset and started bucking. I am going to see if Innovative has a new software release.
Chris
Chris
04-03-07, 12:57 PM
#19
Originally Posted by gxl90rx7
i have the atp input enabled for the wb o2. I still have the stock o2 wired in like original. Altitude set for its lowest setting, since im on the coast
That is how mine is set as well Turbo. What WB you using gxl? Have you tried calibrating it? I am using the Innovative.
04-03-07, 02:58 PM
#21
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i don't have a good log to show but i was experiencing the hesitation as well. about 2500 rpm part throttle acceleration. turned up my fuel pressure a bit and got rid of it. looks like i should double check the sidebands narrow band simulation to the ecu.
04-05-07, 07:37 AM
#22
Originally Posted by Henrik
- what kind of injectors do you have for primaries? Sounds like 750's?
- last time fuel filter was changed?
- what kind of WBO2 are you using
- what injector config are you using
- last time fuel filter was changed?
- what kind of WBO2 are you using
- what injector config are you using
04-14-07, 11:15 PM
#24
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I have the same issue as well, I had it with the 1.7 running a safc2 and I just assumed it had something to do with the safc. Maybe it's got to do with the fact that 2500rpm is where the ecu stops running closed loop under light throttle?(correct me if I'm wrong about the closed loop only operating under 2500rpm) I just installed the 2.0 the other day and I'm running the altitude set at 0 and using the atp for the aem uego, but i haven't tuned with it yet I just ran the 550/720 settings and left the safc2 set up. Haven't had time to tune yet. Anyway the bucking still exists, just like you guys said it happens at or around 2500rpm under cruise and my tps is set according to the fsm.
Brent
Brent