No spark from coils

JOEFROMTX

MEMBER
2000 LEXUS RX 300
6 CYL
4WD
AUTOMATIC
118,000 MILES

Lexus 300RX, changed the spark plugs and now the three front coils will not put out a spark? Need some help. What sends power to the coils? Do I need to check anything? Codes: po302, 304 and 306. Thanks.

Monday, December 13th, 2010 AT 1:16 AM

2 Replies

KHLOW2008

MECHANIC
41,814 POSTS

The codes indicates a misfiring, not necessarily the ignition coils are not sparking. If problem occurred only after replacement of spark plugs, I would suggest rechecking the plugs because it sounds like one of the plug spark gap is completely closed.

Also check the wire harness and other connector for looseness.

All 6 coils receives power supply from the same source so there should not be any problem with that.

Please let us know if you need anything else to get the problem fixed.

Cheers

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Tuesday, December 14th, 2010 AT 4:55 PM

BILLWANAMAKER

MEMBER
2 POSTS
1999 LEXUS RX 300
13,000 MILES

Checked for spark at four different coils and have none. Checked ignition fuse it was good, immobilizer seems to be okay. No security light flashing which would mean fire it is armed, crank sensor bad?

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Wednesday, May 23rd, 2018 AT 10:30 AM (Merged)