ECU reset before drag racing?
Super Moderator
Joined: Jul 2006
Posts: 3,365
Likes: 12
From: Orange County, CA
GMC - Miata - Trek - P-Car
Every time, before rolling to the line or exiting the paddock.
It's the easiest way to let that lump in front of the firewall know you're ready to get after it.
It's the easiest way to let that lump in front of the firewall know you're ready to get after it.
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 333
Likes: 1
From: utah
02 c32 99 superduty
I just wish I wasn't at 4600 ft elevation. Ran a 14.60 last year with no mods. Hoping to dip into the 13's this time with mods. Anyone want to take a guess for shnits and giggles???
Super Moderator
Joined: Jul 2006
Posts: 3,365
Likes: 12
From: Orange County, CA
GMC - Miata - Trek - P-Car
http://www.nhra.com/tech_specs/altitude.html
That’s ~13.7 corrected.
With your new modifications, you'll be close to the 12 second club at sea level.
That’s ~13.7 corrected.
With your new modifications, you'll be close to the 12 second club at sea level.
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 333
Likes: 1
From: utah
02 c32 99 superduty
http://www.nhra.com/tech_specs/altitude.html
That’s ~13.7 corrected.
With your new modifications, you'll be close to the 12 second club at sea level.
That’s ~13.7 corrected.
With your new modifications, you'll be close to the 12 second club at sea level.
Almost a Member!
Joined: Apr 2008
Posts: 25
Likes: 0
From: Bayonne, NJ for home/ Deland, FL for school
2002 audi s4
what do you mean by "resetting" the ecu? do you unplug it or the battery for an extended period of time and then on the way to the track let the ECU make new adjustments? This is from the audi world but in my old s4, restarting the ECU JUST before aggressive driving can cause lean conditions which isnt good from a performance standpoint.but if youre adding race gas or maybe a "superior"(by superior i mean something along the lines of comparing HESS to shell or whatever) type of gas you could restart the ECU and allow it to make adjustments during some light driving.
Thread Starter
Senior Member
Joined: Oct 2007
Posts: 333
Likes: 1
From: utah
02 c32 99 superduty
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Apr 2005
Posts: 3,784
Likes: 84
From: SCV SoCal
2002 CLK430
In a Bosch fuel injection system, at wide open throttle, the O2 sensors have no impact on air fuel ratios. ECU’s are usually in one of three modes: warm-up, open loop, and closed loop. The oxygen sensor is only used by the ECU while in closed loop mode. ECUs go into closed loop mode when the O2 sensor is warmed up, the coolant temperature sensor indicates the engine is warmed up, and when either at idle or at cruise.
