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Old 01-05-2013, 04:07 AM   #1
bako
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Default warmup map for TGC deletes

Hello people, I have a question regarding tgv deletes. I have deleted them and now, in cold morning I have vast engine shakes in first 20 secong of warmup. it is so stronmg shake, that I'm afraid of my engine mounts.... if I apply little throtile to cancel warmup map, thene verything goes smooth...

if some of you knows, what should I change in warmup map to fix this issue?
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Old 01-08-2013, 09:32 PM   #2
Concillian
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You need more fuel in the warmup. There is a map that pulls fuel based on temperature... let me find it....

Primary Open Loop Fueling Compensation (ECT)

Is what it's called in my USDM 02 ROM. Stock values are -100 in the coldest columns. I have a different setup (E85 / no TGVs / ID1000). I multiplied this entire table by 0.65 before it was pretty good. Still does some oscillation, but definitely no vibration.

It'll take some trial and error to get the right scaling. I recommend re-copying the stock values and scaling each time, as small multipliers may make no change on the warmer columns.

The ECU is in open loop for a while until the O2 sensor heats up to temp, so this is why it goes away in 10-20 seconds. It's an open loop fueling issue.

MAF scaling may be off as well. My car never shook violently, but on E85 I would start and it would "catch" when the cranking tables were right, but then often die right after if this table and / or warm-up tables were not right. IMO this table is easier to deal with than the warm-up tables, because it's only one table instead of a bajillion in the warm-up category. And the only time the ECT is cold & the car is in open loop is when the car is warming up (unless you're dumb and floor a cold engine).
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Old 01-09-2013, 01:16 AM   #3
bako
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thank you for datailed explanation! I will try to add some fuel for open loop in ECT. in jdm map it is named the same.
I have oem airbox with just silencer deleted. but can MAF scaling be off from the factory?
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Old 01-09-2013, 09:10 AM   #4
quazimoto
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Quote:
Originally Posted by bako View Post
but can MAF scaling be off from the factory?
Yup. Nevers hurts to go back and clean up the stock calibration a little.
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Old 01-10-2013, 02:53 PM   #5
romanlynch
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You might have to change the values in the closed loop fuel comp (ect) too. I had to adjust both in my 02.
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Old 01-16-2013, 12:01 PM   #6
bako
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Quote:
Originally Posted by Concillian View Post
You need more fuel in the warmup. There is a map that pulls fuel based on temperature... let me find it....

Primary Open Loop Fueling Compensation (ECT)

Is what it's called in my USDM 02 ROM. Stock values are -100 in the coldest columns. I have a different setup (E85 / no TGVs / ID1000). I multiplied this entire table by 0.65 before it was pretty good. Still does some oscillation, but definitely no vibration.
so you men, for example, stock values are:

-10 = -85.5
0 = -71.1
10 = -51.3
20 = -31.6

for example, if I make change -85.5 on -105, I will get more fuel in close loop? or on the contrary, I should make it for example -55 to get more fuel?


thank you in advance
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Old 01-16-2013, 05:08 PM   #7
Concillian
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My stock tables are something like:
Code:
-100.00	-100.00	-100.00	-80.50	-61.10	-41.30	-21.60	-19.00	-11.00
(from coldest to warmer, I didn't include all the columns.)

I multiply that by 0.xx (something less than 1)

Like multiply by 0.55 results in:
Code:
-55.00	-55.00	-55.00	-44.27	-33.61	-22.71	-11.88	-10.45	-6.05
Which results in MORE fuel at cold temperatures between keying the ignition and warm-up of the O2 sensor and a switch to closed loop.

Since my ROM has -100 in the coldest columns, it's easy to see how much I've adjusted by, since the coldest columns are always equal to the % change I made to the entire table. Start with a pretty big change, like multiplying by 0.6 or something, then make changes in 3-4% up and down the next couple days and note which direction to head to get better.

Last edited by Concillian; 01-16-2013 at 05:14 PM.
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Old 01-17-2013, 01:24 PM   #8
bako
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that's a man : ) thank you much, everything is clear now!
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