Haltech stubborn lean spots......
07-30-08, 09:18 AM
#1
tom port.. AKA streetport
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stubborn lean spots......
first five minutes of driving the car i CANNOT get this lean problem taken care of?
the AIT MAP (fuel) is jacked all the way up? once i get to the normal operating temps its fine? even free revving when i first start it? i hold the throttle at 2 to 2.5 RPMS for a few seconds and it goes lean...i let off the throttle and try it again and the first few seconds its fine..then lean again....
the AIT MAP (fuel) is jacked all the way up? once i get to the normal operating temps its fine? even free revving when i first start it? i hold the throttle at 2 to 2.5 RPMS for a few seconds and it goes lean...i let off the throttle and try it again and the first few seconds its fine..then lean again....
07-30-08, 10:45 AM
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tom port.. AKA streetport
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system has been pressurized to 17LBS. using this...
http://www.boostpro.net/prodtester.html
and soapy water....no leaky injectors.
after its at 190-200F it runs fine.
just on warm up. goes lean, spits, pops and such....
http://www.boostpro.net/prodtester.html
and soapy water....no leaky injectors.
after its at 190-200F it runs fine.
just on warm up. goes lean, spits, pops and such....
07-31-08, 11:29 AM
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tom port.. AKA streetport
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i thought i read in the haltech manual that the coolant MAP was for idling purposes....turns out im wrong....i still need to fix the throttle pump...need to get rid of the "POPPING" after i let of the throttle...
thanks though!
thanks though!
07-31-08, 11:39 AM
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Letting off the throttle and getting "pops" in the exhaust isnt throttle pump related its more of a "too lean" on decel kinda thing. Either use the Decel Cut or bring the injector mS up a little on the deceleration part of the map (hint, extreme left).
07-31-08, 11:52 AM
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tom port.. AKA streetport
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exactly where i cant find a happy medium....low VAC, fuel cut is enabled to 2K but below that i cannot find a sweet spot without bucking or to much fuel.....ive tried 11.5 to 14.5......
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08-01-08, 08:17 PM
#9
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I've had this problem with my E8 on the decel transitioning back to the fuel map also... 
My decel fuel-cut RPM is set at 1,800RPM, and I can tell when it hits that point every time.
Mines is down to a very slight buck, and it does have to do with your high vacuum fuel maps.
Think about it...fuel-cut back into adding fuel...
Going from no fuel to too much fuel will cause it to buck.
Too lean at high vacuum will cause the engine to buck.
You almost can't win unless you hit the AFR spot on.
Since the "bars" at this point are really low / short, I'd imagine it'll take really fine, fine adjustments to get this right.
Others have adjust the decel fuel cut really high - like 3,000RPM! - to stay away from this "problem", but this just eats gas.
I try to run mine low just to see how good I can get my gas mileage to go up - good idea in this day of stupid gas prices!
If it's tempermental in relation to engine (i.e. coolant) temps, then it has to be the COOLANT fuel compensation maps....
-Ted
My decel fuel-cut RPM is set at 1,800RPM, and I can tell when it hits that point every time.
Mines is down to a very slight buck, and it does have to do with your high vacuum fuel maps.
Think about it...fuel-cut back into adding fuel...
Going from no fuel to too much fuel will cause it to buck.
Too lean at high vacuum will cause the engine to buck.
You almost can't win unless you hit the AFR spot on.
Since the "bars" at this point are really low / short, I'd imagine it'll take really fine, fine adjustments to get this right.
Others have adjust the decel fuel cut really high - like 3,000RPM! - to stay away from this "problem", but this just eats gas.
I try to run mine low just to see how good I can get my gas mileage to go up - good idea in this day of stupid gas prices!
If it's tempermental in relation to engine (i.e. coolant) temps, then it has to be the COOLANT fuel compensation maps....
-Ted
08-02-08, 09:15 PM
#11
tom port.. AKA streetport
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Ok, do you have low imp. or high imp. injectors
1600's are low...
you TPS is good?
If it's tempermental in relation to engine (i.e. coolant) temps, then it has to be the COOLANT fuel compensation maps....
My decel fuel-cut RPM is set at 1,800RPM, and I can tell when it hits that point every time.
Mines is down to a very slight buck, and it does have to do with your high vacuum fuel maps.
Think about it...fuel-cut back into adding fuel...
Going from no fuel to too much fuel will cause it to buck.
Too lean at high vacuum will cause the engine to buck.
You almost can't win unless you hit the AFR spot on.
Since the "bars" at this point are really low / short, I'd imagine it'll take really fine, fine adjustments to get this right.
Others have adjust the decel fuel cut really high - like 3,000RPM! - to stay away from this "problem", but this just eats gas.
I try to run mine low just to see how good I can get my gas mileage to go up - good idea in this day of stupid gas prices!
Mines is down to a very slight buck, and it does have to do with your high vacuum fuel maps.
Think about it...fuel-cut back into adding fuel...
Going from no fuel to too much fuel will cause it to buck.
Too lean at high vacuum will cause the engine to buck.
You almost can't win unless you hit the AFR spot on.
Since the "bars" at this point are really low / short, I'd imagine it'll take really fine, fine adjustments to get this right.
Others have adjust the decel fuel cut really high - like 3,000RPM! - to stay away from this "problem", but this just eats gas.
I try to run mine low just to see how good I can get my gas mileage to go up - good idea in this day of stupid gas prices!
once i can get my internet to work better ill post my throttle pump maps....
08-03-08, 07:58 AM
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Make sure you've set your injector current correctly, since you're splitting impedances on the injector drivers and you have to set them with only 1 option, i suggest you set them at 3A. Also, you did not answer my throttle pump dead band, you may want to play with that value to either bring it up or down to make sure your throttle pumps either activate or dont at the appropriate or inappropriate time.
08-03-08, 07:31 PM
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tom port.. AKA streetport
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thanks claudio...ill double check the injector current.....
sorry about the throttle pump issue...ive been having a hard time with my internet (uploading pics)....
sorry about the throttle pump issue...ive been having a hard time with my internet (uploading pics)....
08-09-08, 12:51 PM
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[QUOTE=RETed;8431969]I've had this problem with my E8 on the decel transitioning back to the fuel map also...
My decel fuel-cut RPM is set at 1,800RPM, and I can tell when it hits that point every time.
i think the decel fuel on point is hard. i have a stock bmw and it bucks when fuel comes back on too. that being said the stock mazda ecu has that "shutter" zone where its not on or off, but on, off or on one rotor, that helps a lot
agreed on the throttle pumps too, i rarely touch em
My decel fuel-cut RPM is set at 1,800RPM, and I can tell when it hits that point every time.
agreed on the throttle pumps too, i rarely touch em
08-09-08, 06:09 PM
#20
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Your E6K is set to /2, right?
If so, typically, <1,500 would be around 30 - 50.
1,500 - 3,000 would be 15 - 20.
Above 3,000 would usually be zero.
This is set-up for a 13B turbo with the throttle body mod.
The TB mod requires more fuel at lower RPM's to compensate for the abrupt opening of the throttle plates.
The 13B will ingest lots of fuel before showing signs of being overly rich.
Have you tried to play with the throttle pump values?
The main fuel maps should be dialed in really good first.
What kinda gas mileage are you getting?
Your gas mileage will give you an idea of how well your fuel maps are tuned...
-Ted
If so, typically, <1,500 would be around 30 - 50.
1,500 - 3,000 would be 15 - 20.
Above 3,000 would usually be zero.
This is set-up for a 13B turbo with the throttle body mod.
The TB mod requires more fuel at lower RPM's to compensate for the abrupt opening of the throttle plates.
The 13B will ingest lots of fuel before showing signs of being overly rich.
Have you tried to play with the throttle pump values?
The main fuel maps should be dialed in really good first.
What kinda gas mileage are you getting?
Your gas mileage will give you an idea of how well your fuel maps are tuned...
-Ted
08-09-08, 08:40 PM
#21
tom port.. AKA streetport
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Your E6K is set to /2, right?
im not sure what this is?
my TB is ported and such.....
my fuel mileage is getting better (dont have any numbers yet)....the fuel MAP def. still needs the bugs worked out.
i havent touched the throttle pumps yet.
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