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Why won't it start cold?

Tiny
JACKV
  • MEMBER
  • 2004 PONTIAC GRAND AM
  • 120,000 MILES
04grand am 3.4 starts cold only with ether, then starts and runs fine until cold again. Injectors not firing in start position when cold only. Did this from one day to next. Had pluged fuel filter replaced this and fuelpump. Has spark in start position. Have not checked for codes yet.
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Thursday, March 22nd, 2012 AT 2:26 PM

3 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check ect and maf sensor.
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Thursday, July 30th, 2020 AT 4:57 PM
Tiny
JACKV
  • MEMBER
  • 2 POSTS
Thanks for the help. Upon further testing I found fuses #34(aux pwr/cigar) and #37(A/C BFC)blown, after replacement it started like a charm. Jack V
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+1
Thursday, July 30th, 2020 AT 4:57 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Cigar fuse on some gm's ties into the ecm, so if it blows again, circuit tests may be needed.
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Thursday, July 30th, 2020 AT 4:57 PM

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