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2003 Kia Spectra Rough start, CEL with P0302 code

Tiny
KINGROCK
  • MEMBER
  • 2003 KIA SPECTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 103,000 MILES
2003 Kia Spectra has a rough start about 50% of the time. Throws a CEL with P0302. Sometimes drives a little rough too.

Replaced all plugs. Replaced coil for Cyl #2. Dealer said fuel pressure was below spec. Replaced fuel pump and fuel filter. Still throwing P0302.

What should I try next? Fuel injector?
Is there some testing I can do to narrow the problem instead of buying expensive parts?

Thanks!
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Tuesday, August 11th, 2009 AT 4:28 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Seems like logical step injector. Try some fuel system cleaner Techron works great. Get at any parts store in black bottle made by Chevron. If runnig improves then you"ll know inj. Is at fault.
Hope this helps
Thanks for donate
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Wednesday, August 12th, 2009 AT 9:18 AM
Tiny
KINGROCK
  • MEMBER
  • 3 POSTS
Just because I hate reading internet forums and never finding out the result --

The problem turned out to be a blown head gasket. Did a compression test and cyl #2 was low. Looked harder and saw coolant in the cyl. Went through the ardous task of replacing the head gasket, machining the head, valve job, new timing belt, and waterpump. Car drives great now. No CEL. No overheating, no problems!
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Wednesday, September 23rd, 2009 AT 1:10 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Thanks for posting back is good to know how it turns out.
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Thursday, September 24th, 2009 AT 11:57 AM

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