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06 Lucerne starts but dies right away
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jasecom89
User
Feb 23, 2014, 7:46 AM
Post #1 of 12
(3486 views)
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06 Lucerne starts but dies right away
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I have an 06 Buick lucerne that I bought around 4 days ago. It had 200k miles, v6, and in need of a tune up. I changed the spark plugs and, sure enough, the spark plugs looked pretty bad; in addition, the plugs that were on it weren't iridium (manufacturers specs). I got some iridium spark plugs from autozone but they were not gapped correctly, the specs are .060 and the plugs had .063. I DID NOT gap them, installed them, and now my car won't start and run, no check engine light. If I throttle it to 3k rpms it'll stay running, but not lower.
P.S. It might be worth mentioning that the bank 2 o2 sensor was directly behind my last spark plug, and it may have been "tugged" on accidentally, don't know if that could be it but... Idk
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kev2
Veteran
Feb 23, 2014, 10:46 AM
Post #2 of 12
(3461 views)
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Re: 06 Lucerne starts but dies right away
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one thing at a time- you change plugs?
1) you did use AC Delco ?
....... I doubt the .003 will prevent it from starting.
2) when you start vehicle -or try- the CEL should come on @2 seconds fhen go out - yes or no?
....... This I believe will be an issue, so common with used vehicles let us know.
3) Is the security light doing as asked of the CEL?
The o2 sensor would not be an issue in starting... if there was I suspect a code would set- see question #2.
Answer those 1-3 then we will get into BASIC troubleshoting a no statr - do you have a fuel pressure gauge, a DVOM or test light?
PS - A tune up - there is nothing to really 'tune'/adjust SO we are always asking what is you meaning of a tune up.
(This post was edited by kev2 on Feb 23, 2014, 10:50 AM)
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jasecom89
User
Feb 23, 2014, 11:03 AM
Post #3 of 12
(3457 views)
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Re: 06 Lucerne starts but dies right away
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Yes, I changed the plugs. By tune up I mean maintenance (oil change, new plugs and wires, air filter, etc.). I used Bosch plugs. It starts decently just dies right away unless I throttle. The lights in the dash seem to operate normally (flash on then off at start). I do not have any of the tools you mentioned but can get access to if necessary.
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GC
User
Feb 23, 2014, 11:04 AM
Post #4 of 12
(3457 views)
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Re: 06 Lucerne starts but dies right away
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Was it doing this before changing plugs? Did you use oem plugs?
Start by looking over everything you might have disturbed - sensor connectors,wiring,fuel or vacuum lines. Make sure plug wires are seated on plug and coil. Make sure none got put back on the wrong cylinder.
Have any way to get your hands on a scan tool? Im guessing there is going to be a pending code in there, or might have to access live data to get some direction on where to look.
____________________________________________________
Willing to help, willing to learn... Rob
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kev2
Veteran
Feb 23, 2014, 1:46 PM
Post #6 of 12
(3436 views)
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Re: 06 Lucerne starts but dies right away
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Lets just say the bosch plugs are not recommended.. the are really really NOT recomended
The 3k rpm issue to me would suggest fuel management- very important - I ask again for the status of the CEL aka service engnine soon light- the engine shaped symbol ? on for @2seconds then off ? I believe this is a elec throttle and starting as you describe would be an issue-
Follow GC's advice retrace your work- missed vacuum line, PCV, air inlet ducting disturbed,
(This post was edited by kev2 on Feb 23, 2014, 2:12 PM)
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kev2
Veteran
Feb 23, 2014, 2:14 PM
Post #8 of 12
(3427 views)
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Re: 06 Lucerne starts but dies right away
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oops  bad grammar - those bosch plugs should go - not recomended.
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jasecom89
User
Feb 24, 2014, 12:11 PM
Post #9 of 12
(3410 views)
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Re: 06 Lucerne starts but dies right away
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Well guys, I feel like an idiot.. The brake booster line was not connected... Runs now. Although I did go with ac delco plugs.
Thanks for the help!!
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kev2
Veteran
Feb 24, 2014, 12:16 PM
Post #10 of 12
(3409 views)
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Re: 06 Lucerne starts but dies right away
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that large a vac leak and no CEL ? again you should have it scanned and confirm the system works
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jasecom89
User
Feb 24, 2014, 12:27 PM
Post #11 of 12
(3408 views)
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Re: 06 Lucerne starts but dies right away
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I failed to mention that what led me to my solution was buying an obd2 and retrieving a pending (no cel, just pending) p0171 code. Googled it and searched for any vacuum leak. The brake booster line was against a flat portion of the firewall. What exactly do you mean 'make sure the system works'?
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 24, 2014, 12:36 PM
Post #12 of 12
(3404 views)
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Re: 06 Lucerne starts but dies right away
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Wow, that must have been hissing like hell. At least you found it now
Closing this question as solved.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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