2.4 f/i Tuning Question?? Power Enrichment
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2.4 f/i Tuning Question?? Power Enrichment
im tuning my 2.4 ss/sc and the car will boost fine, in open loop, However, power enrichment is not kicking in. We've tried altering the kpa in which it engages but still nothing. When boosting the power enrichment is not kicking in so the extra fuel we need is not being delieverd and we're running lean at a constant 14.7
In closed loop, as soon as the car should be going into PE, it boggs down. In closed loop i cant even get the car to boost.
anyone have any ideas what may be affecting it.
So basically reguardless of open or closed loop, power enrichment will not engage.
ANY ideas would be greatly appreciated!!
In closed loop, as soon as the car should be going into PE, it boggs down. In closed loop i cant even get the car to boost.
anyone have any ideas what may be affecting it.
So basically reguardless of open or closed loop, power enrichment will not engage.
ANY ideas would be greatly appreciated!!
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From: East Brunswick, NJ
That's your PE Delay
I thought there was a parameter to lower the delay. Basically, it gives a count of (example: 4 seconds) seconds before it goes into Power Enrichment.
Also, it should be in closed loop (staying at 14.7) and entering power enrichment from there when you get in higher throttle positions.
I thought there was a parameter to lower the delay. Basically, it gives a count of (example: 4 seconds) seconds before it goes into Power Enrichment.
Also, it should be in closed loop (staying at 14.7) and entering power enrichment from there when you get in higher throttle positions.
try clamping the 02 signal for power enrichment. im not sure how this would work on HPT, but i know a lot of piggyback manufacturers use this so the ECU thinks its still running stoich when your really running rich for your boost
i hope this helps
It is very common with modern cars ECUs and piggyback for the two sometimes to fight in a closed loop. I.e. you're just going under boost but in some cases the main ECU still wants to keep the fuel mixture at stoich for some extra time. So, you add more fuel on the piggyback side, the piggyback extends the stock ECU fuel injector open pulses, but the main ECU sees the mixture getting richer (by the O2 sensor) and fights back by shortening its injector pulses. It happens quite a lot with piggybacks in new cars (for emission reasons they get programmed stock to stay much more in closed loop), expecially in transition from cruising to acceleration/boost.
So, some piggyback controllers (to avoid such lean condition during transition to boost and prevent momentary lack of power/pinging) have the feature to clamp the O2 signal fooling the main ECU that the fuel mixture is still at stoich levels so the main ECU doesn't fight back ...
Does the new AEM fuel controller have such feature (usually called O2 sensor clamp)? It is very important thing.
Examples of other brands fuel controllers currently popular on the market you'll be joining:
Greddy e-Manage Ultimate - look for the feature called "O2 feedback":
http://www.greddy.com/products/displ...SubCategory=47
PowerCard Pro - the feature is called "O2 simulated closed loop":
http://www.powercardtuning.com/produ...pro/index.aspx
ELF - the feature is called "O2 clamp":
http://www.stageonetuning.com/index....PROD&ProdID=11
So, some piggyback controllers (to avoid such lean condition during transition to boost and prevent momentary lack of power/pinging) have the feature to clamp the O2 signal fooling the main ECU that the fuel mixture is still at stoich levels so the main ECU doesn't fight back ...
Does the new AEM fuel controller have such feature (usually called O2 sensor clamp)? It is very important thing.
Examples of other brands fuel controllers currently popular on the market you'll be joining:
Greddy e-Manage Ultimate - look for the feature called "O2 feedback":
http://www.greddy.com/products/displ...SubCategory=47
PowerCard Pro - the feature is called "O2 simulated closed loop":
http://www.powercardtuning.com/produ...pro/index.aspx
ELF - the feature is called "O2 clamp":
http://www.stageonetuning.com/index....PROD&ProdID=11
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she's running amazingly right now. i'll have updates later
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haha well... bigworm set the PE to engage at 100% throttle which technically isnt possible with the pressure sensors, so we had to back it back down to 90. car is screaming though and its literally slamming our heads back. if i can find a dyno shop open tomorrow i'll get one done.
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haha well... bigworm set the PE to engage at 100% throttle which technically isnt possible with the pressure sensors, so we had to back it back down to 90. car is screaming though and its literally slamming our heads back. if i can find a dyno shop open tomorrow i'll get one done.
OMG...
I swear I was thinking about throttle position for a minute then thought "nah..."
Hunterkiller, that would apply in any other circumstance but with HP Tuners, you can get rid of PE Delay all together, like they did.
its been a while since youve called me hunter, adam. again, im unfamiliar with HPT in the least, so i really dont know what kind of limitations it has
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From: west virginia
you say you were having the same problems with pe....would it have fixed your problems if you had taken the steps beck used? Just curious..wasnt sure if it was just your tuner not knowing what he was doing or you just still couldnt get i to work
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From: Pittsburgh, PA
I scanned his car before he had the Hahn engine management on it. His was the ECM still using a MAP/MAF blend instead of 100% MAF. I would have fixed it that night but the LS2edit calibration wouldn't let me in.
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