2001 Honda CRV misfire when warmed up

Tiny
BOB8650
  • MEMBER
  • 2001 HONDA CRV
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 123,000 MILES
Did not run (installed new coil )car would start, noticed antifreeze blow by at radiator found water pump bad (changed the water pump and timing belt) car still had misfire checked compression number 2 cyl low (did head gasket ) still have misfire (did plugs, cap, wires, rotor, checked fuel psi ) still have misfire when warmed up (my next try would be ignition module) does any one have a better idea?
Wednesday, January 6th, 2010 AT 8:43 AM

5 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Did you send the head out to be checked when you did the gasket? Overheats with aluminum engines usually warps or cracks them. Did you re check compression? Small cracks may not be noticed without machine shop testing. When it's just the head gasket, two cylinders are low side by side.
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Wednesday, January 6th, 2010 AT 12:36 PM
Tiny
BOB8650
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  • 3 POSTS
Yes head was done by BOYD'S Moterworks and is 100%
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Friday, January 8th, 2010 AT 8:17 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If the head is good, compression is good, and spark to#2 is strong, check the fuel injector, 123,000 miles it wouldnt be a stretch to see a clogged injector or two.
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Friday, January 8th, 2010 AT 2:37 PM
Tiny
BOB8650
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Ive unpluged each injector drop off seams to be the same I pulled the fuel rail and checked the screen in each injector all were clean. The car was running fine till it didnt start and was brught to me with no spark. I have found in the past ford and chevys with bad mafs that gave me similer problems. But this prick doesnt have a maf sensor. The coil had a burn or ark mark on it? Dont know if this is any help
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Friday, January 8th, 2010 AT 6:10 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Checked for Tech bullitens today, news isnt good if this is your problem! Check valve heights!
Superceded Bulletin(s): 03-038, Â Date of Issue: Â December 19, 2003 Related Ref Number(s): 03-038 ARTICLE BEGINNING SYMPTOM The engine idles roughly, is hard to start, performs poorly, or has the MIL on with DTC P0301, P0302, P0303, P0304 (cylinder misfire), or P0172 (fuel system too rich). PROBABLE CAUSE One or more exhaust valves have receded into the cylinder head. CORRECTIVE ACTION Inspect the valve clearance and, if necessary, replace the cylinder head. PARTS INFORMATION Gasket Kit: P/N 06110-PHK-A00, H/C 6079479 Cylinder Head: P/N 10003-PJS-A01, H/C 7590821 NOTE: (Supersedes 03-038, dated December 19, 2003)
I sent the rest of the bulliten to your email.
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Friday, January 8th, 2010 AT 6:18 PM

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