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 Post subject: car just wont start
PostPosted: Sun Mar 17, 2013 4:06 pm 
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Joined: Sat Feb 09, 2013 7:43 pm
Posts: 26
Location: saint petersburg, florida
Year and Trim: 1990 bonneville le
Hi curious why my 90 bonneville turns over and wont start? The mechanic said she had no spark and we need a new icm, i rplaced it myself and also put in a new coil both borg warner, there was a lot of goop around the bottom that happened before.The car ran but it still wanted to stall which was the original problem, on sat i unplugged the tps to check out what would happen, then i got in the car put her in reverse and she died and never re fired?? This is crazy she has fuel pressure and spark, need any advice folks, and thanks in advance :dontknow: also when you turn it over should the ses light come on and then go off.


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 Post subject: Re: car just wont start
PostPosted: Sun Mar 17, 2013 4:51 pm 
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Certified Bonneville Nut
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Joined: Tue May 27, 2008 8:53 am
Posts: 5353
Location: Las Cruces, NM
Year and Trim: 1993 Buick Park Avenue
1994 Buick Regal Custom
Is the SES light coming on at all? If it is, you should be able to pull codes out of it to see if that gives you any direction.

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1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place


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 Post subject: Re: car just wont start
PostPosted: Mon Mar 18, 2013 12:32 am 
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Joined: Tue Aug 25, 2009 8:32 pm
Posts: 4425
Location: Dearborn, MI
Year and Trim: '93 SSEi
'05 STS-4
'97 Camaro
'97 LeSabre
Unplug the mass air flow sensor (MAS to the LG3 guys, MAF sensor for everyone else...) and try again. If it starts up and runs differently (better) than before, replace it.

The SES light comes on for a few seconds when you turn the key to on, it's the 'bulb check' iirc.

Did you put a 194 bulb in place of an injector to see if the computer is commanding injector pulse, or just check for full pressure at the rail? Both have to happen to have fuel in the cylinder.

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Blow all the things! Wait, I meant boost. Boost!
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Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, and lots more! Build thread
'97 Chevy Camaro - 3800 supercharged, T5, T-tops
'05 Cadillac STS - V8, AWD, her DD
'92 Olds Trofeo - Fair weather DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 winter DD
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


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 Post subject: Re: car just wont start
PostPosted: Mon Mar 18, 2013 4:10 am 
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Joined: Mon May 19, 2008 10:19 pm
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Location: Hillsboro, Oregon
Year and Trim: .
2015 Buick Enclave
2013 Buick Regal GS
Techinfo has a write up on checking the TPS. I guess if it fails in an open state (high output) it could disable the injectors thinking it is in a state to clear a flooded condition.

There is also a write up in techinfo for pulling the codes on these with a simple jumper made out of anything from a piece of wire to a paper clip.

I would link the articles, but I am on my phone right now.


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 Post subject: Re: car just wont start
PostPosted: Mon Mar 18, 2013 6:25 am 
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Joined: Thu Oct 21, 2010 2:43 pm
Posts: 87
Year and Trim: Buick pa ultra 1991, 3800series I
i had similar symptoms- fault was a blown FUSE at right side relay center.
so check the fuses ALSO near the cars brain center (PCM).

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 Post subject: Re: car just wont start
PostPosted: Fri Mar 22, 2013 12:22 pm 
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Joined: Sat Feb 09, 2013 7:43 pm
Posts: 26
Location: saint petersburg, florida
Year and Trim: 1990 bonneville le
First off THANKS 2 all of you who posted on this problem.It turned out to be a loose ground wire under the icm box, i could swear i torqued the nut down that grounds the computer under the icm, i found the inner nut loose????? What the heck all the stuff i did and one darn nut cause me grief, lol. This site is the bomb all of you are wonderful people, and remember to tighten and triple check everything, i can believe my dumb mistake :banghead: :banghead:


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 Post subject: Re: car just wont start
PostPosted: Sun Mar 24, 2013 3:02 pm 
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Joined: Tue Aug 25, 2009 8:32 pm
Posts: 4425
Location: Dearborn, MI
Year and Trim: '93 SSEi
'05 STS-4
'97 Camaro
'97 LeSabre
Glad to see you got it figured out!

_________________
Blow all the things! Wait, I meant boost. Boost!
Image

Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, and lots more! Build thread
'97 Chevy Camaro - 3800 supercharged, T5, T-tops
'05 Cadillac STS - V8, AWD, her DD
'92 Olds Trofeo - Fair weather DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 winter DD
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


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