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1991 Honda Civic failed emissions 1991 Honda 1.5

Tiny
ROTTI7631
  • MEMBER
  • 1991 HONDA CIVIC
  • 4 CYL
  • FWD
  • MANUAL
  • 179,202 MILES
Hello I took my car for a emissions and it failed it has high hc limts are 1500 my readings are 2015 I changed the spark plugs oil air filter everthing else passed catalytic converter passed fuel filler restrictor pass air injection system passed oxygen senser pass check engine light pass fuel cap pass evaporative system pass it as a thortle body I dont know what to do next any idea please help
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Monday, September 29th, 2008 AT 9:19 PM

2 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Check your fuel pressure, you may be running a little rich, and may have to replace your fuel pressure reg.
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Monday, September 29th, 2008 AT 9:27 PM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Go here for fuel pressure check

https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
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Monday, September 29th, 2008 AT 9:28 PM

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