Im working on a new way to add fuel to our cars, cheaply and easily... But have a question. Do our ECU's add or take away any timing when the engine temp is cold? Ive looked at cal's in MP tuner and cant find any tables for this. I know when the motor is cold, it adds more fuel, but does it mess with the timing? Once I have this info I can figure it out and share my idea.
theres a cold enrichment table for spark
advance from map cold
not sure what it be in MP tuner....
Any idea what it does? Pull or add?
it pulls timing
anything under 160 deg F i believe.....there may be a way to adjust that too tho....
So its pulling it, not adding it. Thats what I wanted to hear. I looked it over again, found those tables and thought the same thing. Thanks!
the tables should be pretty similar until they get into boost. the cold table will be slightly lower, then really drop off timing alot more to be safe when boosting
Since I have your attention... Does the intake temp sensor mess with timing? I only see fuel tables for it, no spark.
Thanks again
im sure someone can answer this better. but I do believe the temp sensor is referenced through fuel
The way I've seen the tables it ADD's timing. Usually only a couple degrees. On the 5spd cars where I seal off the AIS passage I bump that table up 4 degrees or so more so the car idles when cold. In fact today I had the scanner plugged into my new yorker. Warm temp is 18 degrees of timing. When fired up I was running 22 at idle till about 130ish.
That is what I see too, however after 6psi (on a sbec vnt) it pulls timing, so it will work for what I want to do. Im still not seeing any timing tables for the intake temp, safe to assume all it does is add fuel?
On my '87 cal (based off the '87 MP StageII), it really doesn't do anything except it adds timing in the low vacuum and low boost areas.
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