Cold Hesitation
#1
Cold Hesitation
After all I've been through with this car, I feel kinda retarded asking this question, but I have a hesitation right after a cold start and I don't know what it is. Only happens once in the day in the morning right after cold start and I put it in drive to leave. Put it in gear, step on the gas, it falls on it's face for a second, picks back up and runs fine the rest of the day. No codes. MAF is new/ish Hitachi, sensors are all good, CKP sensor is new, I'm kinda lost. It behaves like a cold electrical connection that isn't making contact until it warms up and expands, then it's fine.
It also seems to surge when I kick down a gear at speed. Like starving for fuel or something. Fuel pump is new/ish Walbro, no intake leaks/unmeasured intake air that I can see. My stuff is pretty clean. I've kept good care of it since the swap. 5k oil intervals, all kinds of regular maintenance, etc. Hood is often up, I haven't ignored this car.
Thanks all
It also seems to surge when I kick down a gear at speed. Like starving for fuel or something. Fuel pump is new/ish Walbro, no intake leaks/unmeasured intake air that I can see. My stuff is pretty clean. I've kept good care of it since the swap. 5k oil intervals, all kinds of regular maintenance, etc. Hood is often up, I haven't ignored this car.
Thanks all
Last edited by User1; 01-07-2024 at 02:14 PM.
#5
Interesting you ask about the throttle body wiring. I swapped in the beginning of 2019 and used the Nisformance pigtail for the throttle body. It gave me a lot of grief and I was constantly having to clear tb codes on the side of the road to be able to drive again. I ditched the Nisformance pigtail and hard-wired the throttle body and never had a problem again. This cold hesitation is the first time I've had an issue since. I think you might be going in the right direction with this. I'll look at the wiring and see if there's anything to see. I soldered the connections and do decent, proper work, so I'll be a bit surprised if it's my wiring.
#6
what region do you live in?
have you tried throttle body cleaning?
a friend of mine has a 2018 civic and I recently had to do a throttle body cleaning on it. his throttle body was getting kinda laggy and a bit unresponsive. I had him hold the gas down as I sprayed carb cleaner into the valve cover breather tube that leads to the throttle body hose. he' isn't a car guy at all and was getting ready to trade it in thinking his transmission was going bad lol...
have you tried throttle body cleaning?
a friend of mine has a 2018 civic and I recently had to do a throttle body cleaning on it. his throttle body was getting kinda laggy and a bit unresponsive. I had him hold the gas down as I sprayed carb cleaner into the valve cover breather tube that leads to the throttle body hose. he' isn't a car guy at all and was getting ready to trade it in thinking his transmission was going bad lol...
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