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Engine not revving past 3,000 RPMs

Tiny
BLESSING EWOBOR
  • MEMBER
  • 1999 HONDA CIVIC
  • 4 CYL
  • MANUAL
  • 268,956 MILES
Hello, the vehicle's engine is not revving more than 3,000 RPMs. The fuel pump has been replaced. The sparks plugs and coils are okay. What could be the cause?
Tuesday, April 20th, 2021 AT 12:24 PM

9 Replies

Tiny
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I also noticed that all the spark plugs were covered with black soot. I have replaced the spark plugs, clean the EGR valve.
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Wednesday, April 21st, 2021 AT 11:44 AM
Tiny
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I tested the solenoid show below by battery, I could hear the sound clicking sound. While the engine was running. I tested for voltage at the solenoid but there was no power. It is supposed to have power while the engine is working?
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Wednesday, April 21st, 2021 AT 12:01 PM
Tiny
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The smoke from the exhaust is irritating to eyes.
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Wednesday, April 21st, 2021 AT 12:02 PM
Tiny
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  • MECHANIC
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Hi,

Are any codes present? Also, have you checked fuel trims? Based on what you mentioned regarding the exhaust sounds like it is extremely rich. Also, are there any strange sounds from the catalytic converter indicating it could be partially plugged?

Check the short-term fuel trims. I have a feeling it could be related to a stuck fuel injector. Also, check to see if there are codes present. I have a feeling you won't need this, but here is a video showing how to retrieve codes:

https://youtu.be/b2IJGfImVvw

One last thought, if you do a fuel pressure test, watch fuel pressure drop off to see if it drops too fast. That could indicate an injector issue.

Let me know.

Joe
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Wednesday, April 21st, 2021 AT 6:57 PM
Tiny
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Thank you, but I am not sure that the catalyst is blocked because I removed the oxygen sensor and start the engine, it was still the same.
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Wednesday, April 21st, 2021 AT 8:46 PM
Tiny
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For the codes, I can't find the OBD port.
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Wednesday, April 21st, 2021 AT 8:50 PM
Tiny
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  • MECHANIC
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Hi,

It should be right below the steering column (approximate center). See the attached pic for the location.

Let me know if you find it.

Joe
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Thursday, April 22nd, 2021 AT 6:51 PM
Tiny
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Thank you sir, it supposed to be there, but the OBD PORT is not there and I have searched for it other places I can't find it.
I have given up on the vehicle, I am no longer interested. Thank you
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Friday, April 23rd, 2021 AT 8:22 PM
Tiny
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LOL I totally understand.

Regardless, please feel free to come back anytime.

Joe
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Friday, April 23rd, 2021 AT 9:24 PM

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