jaredh

iTrader: (2)

Brand new Odyssey PC680 small battery installed. Car somewhat has idle problems. When rolling from a stand still anything below 2000 rpm car has extreme hesitation/bucking issue. It's hard to even get it going.. I was about to do a big build on the car so I hoped new spark plugs and cop kit would help. After the build it is still doing the same thing with this same battery. I need to mention when I went back to the old big battery it ran fine.

I have now replaced the alternator since it was only in low rpms, didn't help. I checked all grounds everything was good. I read on evoscan approx 14v battery seemed to be holding a charge even when the car was moving, not just in idle.

Fuel pressure good, no misfires or engine codes. Can my battery be bad although it's brand new?

Other things I have tried, spark plugs, tps sensor, iacv, no boost leaks, not the tune, timing is spot on,. Thanks for any help or suggestions. If I can't figure it out within the next few days I am going to just relocate the big battery to the trunk so I can use it and atleast have my car running by this weekend.

veszett

i've encountered something similar but mine only hesitates when i mash the accelerator pedal at low rpm, anything under 2500-2800. if i accelerate by gradually pressing down on the accelerator then it doesn't hesitate. i'm running a DEKA ETX14 mini battery.

jaredh

iTrader: (2)

My problem ended up being the coolant temperature sensor after replacing so many things. It never through any codes. If yours doesn't throw codes try replacing that. Took me 5 minutes and only $21 dollars.

veszett

how did you diagnose it to be the coolant temp sensor, did you log it?

jaredh

iTrader: (2)

I couldn't diagnose it. There were no engine codes and logging it, it seemed to be reading fine. I happened to talk to a mechanic that told me to try that because it sounded like the coolant temp sensor. He had seen that before. I was so surprised when I changed it out and the problem finally went away. It has never came back. Heck this was less than 2 weeks ago. Ive finally been able to start driving it daily. It was the last thing I thought it could have been because it seemed to be logging fine.

veszett

thanks for the info. it sounds like a long shot but i just ordered one so fingers crossed, i guess i'll find out when it arrives next week! i take it it's an easy install and no mucking about with bleeding air out of the cooling system?