Changed Battery and now doesnt start right away

[blackthunder]

Changed the battery in my 04 GP GT and went to start the car and it took longer to fire. Normally she fires up right away and now it takes a couple revolutions before it actually fires.

does it need to relearn because of the battery replacement?

[97AutoXVette]

How many times has that happened since you swapped the battery??

[blackthunder]

i shut it off and started it probably like 3-4 times

[97AutoXVette]

Unless you changed the battery to one with different rated cranking amps, I bet you're fine. I'd give it a few days and see how it's doing. I don't believe the computer learns much from a starting standpoint since that doesn't effect your fuel trims much.

[blackthunder]

ok, it cranks just fine. not sluggish at all.

[industrialfish]

Check the amperage sensor (black round thing) on the ground wire at the battery.

[Russosaur]

PCM just needs to re learn drive it for like 20min and it should be fine

Sent from the Milky Way

[stealthee]

PCM just needs to re learn drive it for like 20min and it should be fine

Sent from the Milky Way

Exactly what I am thinking. Everything will act slightly different at first, until everything gets learned in the ECU.

[blackthunder]

Seemed to start up ok this morning. Probably needed to re learn.

[Madness]

Could it have a been a "weak" new battery? There is a manufacturing date code on the side which is a small round sticker with a letter followed by a number. The letter stands for the month of mfg, A=Jan, B=Feb, the number is the last digit of year. A C4 sticker =March 2014. You may have bought a battery that was not fully charged and needed to be driven for a while to charge the battery.

[Scottydoggs]

mine will do this too if i take the battery out, will crank like 3 times then fire up vs a flick of the key normally. the pcm is just relearning.

[lewis1952]

my 2000 SE 3.1 did the same thing when I put in a new battery