Mechanics

VI-RS MAKE NOISE AND SPUTTERS AT STOP AFTER BATTERY CHANGE

2000 Honda Civic

My battery was going bad because it barely started when I turned the key. So I changed the battery. Now when I come to a stop when i'm in any gear (its' an automatic), my car sputters and feels like its gonna stall out. Today it also started to make this ting ting ting noise from inside the engine. Its only last for like 5-10 seconds. What could be going on? I heard that when you disconnect the battery the computer resets and has to reacclamate itself to the system, which I think is ridiculous. I haven't had the alternator tested but i've been driving it for over a week and the battery hasn't died so I wouldn't think it could be the alternator. Also it definitley was not doing this before I changed the battery. It started after the battery change
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Mvalimont99
September 21, 2012.



Please refer to your previous post.

KHLow2008
Sep 21, 2012.
What you consider "ridiculous" is in fact called the "relearn" procedure. No two sensors are ever exactly alike and to prevent having to do all kinds of time-consuming adjustments after replacing one, the computer learns the parameters by comparing all their readings to each other under varying driving conditions. Until the conditions are met for that relearn to take place the computer is starting from pre-programmed values from the factory.

There are so many different scenarios that no one can remember them all. I CAN share a real easy and common one for Chrysler products. Any time the battery is disconnected for other service the Engine Computer has to relearn "minimum throttle" before it will know when it must be in control of idle speed. Before it learns that it won't know when you're holding the gas pedal down a little or have it released. To meet the conditions for that relearn to take place you must drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals. Most experienced mechanics will do that on a test drive for the customer or they will at least explain the procedure to them. Most do-it-yourselfers aren't aware of that; in fact, some call it "ridiculous". Mitsubishi products use a similar procedure.

Engine Computers also store long-term fuel trim (LTFT) and short-term fuel trim (STFT) numbers in memory. After disconnecting the battery those numbers are lost from memory and the "lookup tables" are rebuilt while driving and modify the pre-programmed factory fuel metering values. You won't even know that is taking place.

You have further proof a relearn is needed on your car. There was no running problem before you disconnected the battery. All that changed was the battery. You should feel extremely lucky you don't own a Volkswagen pile. Along with General Motors and BMW, they have some of the best "got'chas" built into their cars to bleed money from unsuspecting owners. Most Volkswagens won't start after disconnecting the battery or letting it run dead. If it does start it won't come off of idle no matter what you do with the gas pedal, and it won't come out of park. That means dragging it skidding off the hoist onto a flatbed truck for a very expensive trip to the dealer to have the computers unlocked. It's one of many reasons I drive an '88 minivan and will never again buy a new car.

Caradiodoc
Sep 21, 2012.
Duplicate question

Wrenchtech
Sep 21, 2012.
What does that mean?

Caradiodoc
Sep 21, 2012.
It means the man opened a second question on the same problem and it needed to be deleted, not answered.

Wrenchtech
Sep 21, 2012.
I'd be pretty crabby if my long-winded reply got deleted just because the question was asked multiple times. I'm not comfortable butting into other people's conversations even though I do it when I think I can add something of value. A second posting gives me the opportunity to weight in without hogging another person's limelight. So what if they ask twice? I agree it would be nice if we could delete our own entries like we could before, but oh well. The person might get twice as many responses and one will lead to a solution.

Caradiodoc
Sep 21, 2012.
Actually it does not matter if it is a duplicate question. If you have something that you think is worth adding, butting into someones question is not a problem as well.

KHLow2008
Sep 21, 2012.