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1997 Honda Prelude Runing very lean

Tiny
GENE2012
  • MEMBER
  • 1997 HONDA PRELUDE
  • 4 CYL
  • FWD
  • MANUAL
  • 160,000 MILES
My prelude is running very lean and I don't know what it could be any more. I have new O2 sensors, new map sensor, new cat, cleaned the egr and the intake manifold, new spark plugs, new park plug wires and did a compression test and they all good. I have a A/F gauge and it running almost all the way lean. When I drive it it struggles a little bit and the muffler makes a poping noise. I did the timing twice cause I was afraid it was off but it's good. I checked it with a timing light. I have no more idea what it is. The car start fine and everything is good but it's just way to lean to drive.
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Saturday, July 3rd, 2010 AT 6:48 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lean fuel condition could be caused by one of the following below:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.
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Saturday, July 3rd, 2010 AT 7:48 PM
Tiny
GENE2012
  • MEMBER
  • 2 POSTS
I checked all of the listed and that's why I'm stumped. The only thing I can think of now is taking it to the shop. Anymore ideas why it's running so lean?
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Saturday, July 3rd, 2010 AT 8:41 PM

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