BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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 Stumble help.

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PostSubject: Stumble help.   Sat Oct 23, 2010 8:32 pm

The 9c1 has a small issue. When you give it throttle, it will stumble and then clear out and go. This is just a slight stumble, but still a stumble. I know the opti is good. Pretty sure the wires are. I left the plugs in. Any Ideas?
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MASShole9C1



Posts : 4212
Join date : 2009-12-16

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 8:46 pm

With the TPS being a potentiometer, it can get dead spots. It may be stumbling at a spot it consistantly rides at. Check its resistance with OEM specs
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PostSubject: Re: Stumble help.   Sat Oct 23, 2010 8:51 pm

It only does it in gear driving. In park, it revs fine. I probably know the answer, but my head is so full crap, I can't think.
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toomanytoyz
Club President


Posts : 6870
Join date : 2009-01-20
Age : 40
Location : East Hampstead, NH USA

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 8:59 pm

Light throttle? EGR?

Regular throttle? TPS? IAC reset? TBS cleaning? Plugs? Vacuum leaks?


_________________
Bill "The Verb" Crovo - Resident Car Slut & Unicorn Hunter

A Toasted Marshmallow, A Long German, A Lame Suburban and expensive dreams...
Missing all my previous B's, D's and V... Sad
American Ricer
www.badassofne.net
"Ooooh! Look! Something shiny!"
NO MORE UNICORNS!!!!!

LOWER IT!!! Wink
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http://impalass.uniquekind.net/
MASShole9C1



Posts : 4212
Join date : 2009-12-16

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:03 pm

toomanytoyz wrote:
Light throttle? EGR?

Regular throttle? TPS? IAC reset? TBS cleaning? Plugs? Vacuum leaks?


yes
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Guest



PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:05 pm

MASShole9C1 wrote:
toomanytoyz wrote:
Light throttle? EGR?

Regular throttle? TPS? IAC reset? TBS cleaning? Plugs? Vacuum leaks?


yes
BINGO! Thanks guys. Wink
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MASShole9C1



Posts : 4212
Join date : 2009-12-16

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:30 pm

IMPALADAKID wrote:
MASShole9C1 wrote:
toomanytoyz wrote:
Light throttle? EGR?

Regular throttle? TPS? IAC reset? TBS cleaning? Plugs? Vacuum leaks?


yes
BINGO! Thanks guys. Wink

Basketball all in a days work
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Guest



PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:41 pm

toomanytoyz wrote:
IAC reset?
scratch Is this something I can do? What is involved?
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MASShole9C1



Posts : 4212
Join date : 2009-12-16

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:45 pm

Im guessing you need a scan tool

http://www.gnttype.org/techarea/faq/IACresetscan.html
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mean ss



Posts : 648
Join date : 2009-02-25
Age : 58
Location : Nashua NH.

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:46 pm

IMPALADAKID wrote:
toomanytoyz wrote:
IAC reset?
scratch Is this something I can do? What is involved?
http://shbox.com/1/4th_gen_tech2.html#iac_reset
Depress accelerator slightly
Start engine, then release accelerator pedal, run engine for 5 seconds
Turn ignition "OFF" for ten seconds
Restart engine and check for proper idle operation
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toomanytoyz
Club President


Posts : 6870
Join date : 2009-01-20
Age : 40
Location : East Hampstead, NH USA

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:49 pm

IMPALADAKID wrote:
toomanytoyz wrote:
IAC reset?
scratch Is this something I can do? What is involved?

I don't remember, but I know it's quick and easy. Normally that's for an idle issue anyways, but figured that it could be something worth checking if plugs and a TB service didn't clear it up... Wink










EDIT: See, I walk away for a couple minutes before I hit send and someone figured it out already... Very Happy

_________________
Bill "The Verb" Crovo - Resident Car Slut & Unicorn Hunter

A Toasted Marshmallow, A Long German, A Lame Suburban and expensive dreams...
Missing all my previous B's, D's and V... Sad
American Ricer
www.badassofne.net
"Ooooh! Look! Something shiny!"
NO MORE UNICORNS!!!!!

LOWER IT!!! Wink
Back to top Go down
http://impalass.uniquekind.net/
MASShole9C1



Posts : 4212
Join date : 2009-12-16

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:51 pm

mean ss wrote:
IMPALADAKID wrote:
toomanytoyz wrote:
IAC reset?
scratch Is this something I can do? What is involved?
http://shbox.com/1/4th_gen_tech2.html#iac_reset
Depress accelerator slightly
Start engine, then release accelerator pedal, run engine for 5 seconds
Turn ignition "OFF" for ten seconds
Restart engine and check for proper idle operation

LOL i just got done reading that study ...im dumb Question
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mean ss



Posts : 648
Join date : 2009-02-25
Age : 58
Location : Nashua NH.

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 9:58 pm

MASShole9C1 wrote:
mean ss wrote:
IMPALADAKID wrote:
toomanytoyz wrote:
IAC reset?
scratch Is this something I can do? What is involved?
http://shbox.com/1/4th_gen_tech2.html#iac_reset
Depress accelerator slightly
Start engine, then release accelerator pedal, run engine for 5 seconds
Turn ignition "OFF" for ten seconds
Restart engine and check for proper idle operation

LOL i just got done reading that study ...im dumb Question

what you had posted is more for adj. the throttle blades by IAC counts but we want them in the 30's
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MASShole9C1



Posts : 4212
Join date : 2009-12-16

PostSubject: Re: Stumble help.   Sat Oct 23, 2010 10:13 pm

I figured as much. I took a quick glance, posted, then found what you posted
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Guest
Guest



PostSubject: Re: Stumble help.   Wed Oct 27, 2010 3:07 pm

Ok
I found the IAC valve was no good. I replaced it with another one I got from crovo, along with completely rebuilding the TB out of spare parts. Now she runs like a champ. cheers
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Guest



PostSubject: Re: Stumble help.   Mon Nov 01, 2010 9:57 pm

IMPALADAKID wrote:
Ok
I found the IAC valve was no good. I replaced it with another one I got from crovo, along with completely rebuilding the TB out of spare parts. Now she runs like a champ. cheers
I was wrong. Wound up being the EGR after further diag.
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PostSubject: Re: Stumble help.   Today at 2:30 pm

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