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Old 10-12-2018, 03:50 PM
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Question Odd Highway Surging from code P0325?

What's up guys! New to the form.

Long story short, I pulled the Engine and Auto Trans out of my car due to the transmission going out. I went through the motor and replaced the knock sensor, oil pressure switch, most seals on it, timing belt, water pump, valve adjustment, cleaned EGR ports, etc. I swapped in a 5 speed from another 6th gen accord, put in a 5 speed ECU as well.

I was driving the car on the highway for the first time after getting it together, and I noticed this odd surge thing the motor was doing while cruising. It feels like it sucks back and loses power for a second, then it kinda bumps back to normal and starts cruising again. It would consistently do that back in forth in 3 second intervals with a steady throttle input on a flat stretch of highway.

Would that knock sensor malfunction cause something like that? Why is a brand new sensor throwing a code?

Also, the car feels kinda down on power in general, it seemed like it had more juice when it had the automatic, which doesn't make sense. I'm wondering if this could tie in with the surging issue.
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Old 10-13-2018, 12:59 PM
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Re: Odd Highway Surging from code P0325?

Do you have a CEL?
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Old 10-13-2018, 06:16 PM
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Re: Odd Highway Surging from code P0325?

Originally Posted by BlkCurrantKord View Post
Do you have a CEL?
Yes, code P0325
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Old 10-14-2018, 10:10 AM
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Re: Odd Highway Surging from code P0325?

Have you tried WOT to redline through gears 1-3?
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Old 10-14-2018, 04:22 PM
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Re: Odd Highway Surging from code P0325?

I have not, due to trying to break my new clutch in properly. I would be happy to oblige though. May I ask why though?
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Old 10-15-2018, 01:39 PM
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Re: Odd Highway Surging from code P0325?

No real reason behind it except maybe blow out some carbon build up and keep things exercised.

And because it's fun
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Old 10-16-2018, 01:15 AM
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Re: Odd Highway Surging from code P0325?

Are you sure the P0135 code is the only one you are getting?
My 99 recently threw this code along with a P0401 code wihch is insufficient EGR flow. I haven't heard of the 0135 code causing the issue you are describing but the clogged EGR passage WILL cause what you are experiencing and it doesn't always throw a code.
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Old 10-16-2018, 11:19 AM
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Re: Odd Highway Surging from code P0325?

Update, the car's now in limp mode. Won't rev past 3000 rpm. I'll check what codes it's throwing again.
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