off idle stumble
off idle stumble
Im on my 5th chip with my new engine, its still rich.
But I noticed that when going in stop and go traffic, and you go from idle to small amount of throttel, the car stumbles a bit. (tps 0-1%)
I whent from a TPI setup to a lt1intake so I wounder if this could be AE trouble? When I go WOT fast from 2000rpm and abow I got NO hesitation. Its just on low rpms.
I dont know what tabel to work with when it comes to AE, could someone guid me right..
Thanks..
But I noticed that when going in stop and go traffic, and you go from idle to small amount of throttel, the car stumbles a bit. (tps 0-1%)
I whent from a TPI setup to a lt1intake so I wounder if this could be AE trouble? When I go WOT fast from 2000rpm and abow I got NO hesitation. Its just on low rpms.
I dont know what tabel to work with when it comes to AE, could someone guid me right..
Thanks..
Last edited by devilfish; May 6, 2005 at 09:50 AM.
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Car: 2005 Subaru STI
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Yes, it is AE. Tweak the "%AE change based on Delta TPS". That is for small throttle openings. The delta MAP table is for large throttle openings.
Tim
Tim
Joined: Jan 2005
Posts: 10,450
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Is it possible that you are just feeling a lack of low-speed torque on tip-in? The LT1 style intakes are known for rough idle and some surging below 2,000 rpm.
Originally posted by TRAXION
Yes, it is AE. Tweak the "%AE change based on Delta TPS". That is for small throttle openings. The delta MAP table is for large throttle openings.
Tim
Yes, it is AE. Tweak the "%AE change based on Delta TPS". That is for small throttle openings. The delta MAP table is for large throttle openings.
Tim
I got "AE delta TPS multiplier vs delta TPS" is that the right tabel to play with?
And should I increase or decrease the values in order to add or take away fuel?
Originally posted by Fast355
Is it possible that you are just feeling a lack of low-speed torque on tip-in? The LT1 style intakes are known for rough idle and some surging below 2,000 rpm.
Is it possible that you are just feeling a lack of low-speed torque on tip-in? The LT1 style intakes are known for rough idle and some surging below 2,000 rpm.
cheers
Joined: Jan 2005
Posts: 10,450
Likes: 508
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
You might not be getting the fuel quick enough. The LT1 intake has a much straighter shot to the cylinders than the TPI intake does and the initial surge of air hits the cylinders much quicker.
Originally posted by Fast355
You might not be getting the fuel quick enough. The LT1 intake has a much straighter shot to the cylinders than the TPI intake does and the initial surge of air hits the cylinders much quicker.
You might not be getting the fuel quick enough. The LT1 intake has a much straighter shot to the cylinders than the TPI intake does and the initial surge of air hits the cylinders much quicker.
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From: Corona
Car: 92 Form, 91 Z28, 89 GTA, 86 Z28
Engine: BP383 vortech, BP383, 5.7 TPI, LG4
Transmission: 4L60e, 700R4, 700R4..
Axle/Gears: 3.27, 2.73
You could be fighting the delta TPS threshold required to trigger AE. Also adding VE in the low RPMs above idle MAP isn't all that bad of an idea, since little time is spent there.
Originally posted by RednGold86Z
You could be fighting the delta TPS threshold required to trigger AE. Also adding VE in the low RPMs above idle MAP isn't all that bad of an idea, since little time is spent there.
You could be fighting the delta TPS threshold required to trigger AE. Also adding VE in the low RPMs above idle MAP isn't all that bad of an idea, since little time is spent there.
What I would like to do is to "extend" the extra "burst" of fuel. Perhaps VE is a wayto achive this. Will try that.
Next is timing..
Thanks for att the tips so far..
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