Code P0400 on my 1996 Corvette
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Intermediate
Joined: May 2022
Posts: 28
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Code P0400 on my 1996 Corvette
Hey, a couple of days ago my check-engine light came on after I was messing around with replacing the fuel pump/sending unit... (made a couple of posts regarding issues with that, but anyways)
I took it to my local AutoZone to get a read and it came out with a P0400 error code for the EGR system.
However, after replacing the fuel pump with a new Delphi one the exact same day, the light went off after startup!
Lately, however, I've noticed my car seems to idle roughly (it'll sit around 500-600 RPM when I start up), and sorta has a rougher feel at lower RPMs...
I used to have power issues at higher RPMs before replacing my fuel pump (and even sometimes now, I'll notice a power loss), making me think it's the fuel filter acting up.
Now, my car becomes incredibly responsive after a cold start, but after it gets warm, it sorta bogs down.
Does anyone have any tips on testing whether or not my EGR valve/solenoid is causing any of these issues? Thank you
I took it to my local AutoZone to get a read and it came out with a P0400 error code for the EGR system.
However, after replacing the fuel pump with a new Delphi one the exact same day, the light went off after startup!
Lately, however, I've noticed my car seems to idle roughly (it'll sit around 500-600 RPM when I start up), and sorta has a rougher feel at lower RPMs...
I used to have power issues at higher RPMs before replacing my fuel pump (and even sometimes now, I'll notice a power loss), making me think it's the fuel filter acting up.
Now, my car becomes incredibly responsive after a cold start, but after it gets warm, it sorta bogs down.
Does anyone have any tips on testing whether or not my EGR valve/solenoid is causing any of these issues? Thank you
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
Alex, did you not post. A similar "acceleration" 2k - 2.5k range. after FP install unknown year. I'm sorry. Why would you post this Code 400. You did not validate your FP, rail, idle, drive pressure. Or. if you replaced the FF you believe debris entered your system. is this a good summarization?
