EPC, Throttle Body, Misfure?

[GrannyShifter00]

Did a 3rd-4th hard pull on ko4, pull was fine, no bad feeling during but when I got off the highway, EPC light was on solid, and car was misfiring randomly, went into limp and wouldnt go past 2k rpm, no boost. Scanned and found P1558 - Throttle Valve Drive, P1545 - Throttle Valve control system, and random/multi cyl misfire. Was thinking issue with tb, so going to clean and reinstall but any ideas that could help would be great.

[kingofqnz788]

Epc light Maby bad ecu


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[GrannyShifter00]

Can it really happen that fast? the car was running perfect before then, and was just going to get fresh tank of e85, then it just happened

[travis_w]

I had this issue, and my ecu box wasn't sealed correctly, and water got into my connector when I washed it. It took about 15 minutes of driving to start having issues.

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[GrannyShifter00]

so would I just need a new ecu to fix that then?

[travis_w]

I pulled out my ecu and made sure all the connectors were dry. Then, resealed it.

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[GrannyShifter00]

Ok, cause i did notice small amount water in a puddle around driver seat and behind it, so I might have a blockage somewhere and water got into the ecu too.

[travis_w]

Possible.

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[Silverex]

I’ve had a bad throttle body and bad wiring on another car that did that. Usually I’d clear code and it be fine for alil or next day it would drive fine then randomly do it again.
I’d check the wiring first at the connector since that’s quick and easy then see if there’s water in Ecu box like others have mentioned

[GrannyShifter00]

Sounds good, ill update if anything changes or what happens, also would the issue with the throttle body cause multiple random misfires or is that just a completely random thing, at first I thought I just killed a coil pack before I saw the codes for throttle valve control

[GrannyShifter00]

Looked hard for anything, the only thing i forgot was the plug to the tb, took 2 mins to replug it and the cars running as good as before

[travis_w]

Was it unplugged?

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