07-20-2006, 08:03 AM
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#1
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,553
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What a pain in the keister: Here is a test for you!
Lets see how many of you can diagnose this. (I already fixed it but I figured I'd throw it in here as a learning experience for others) I'll post the fix in a day or 2
So I get done with a service call yesterday (Weds). My truck is giving me probs starting. I finally manage to get it started. But at low RPM it's running rough then stalls. At hwy speeds everything is fine, but at lights
I have to keep the engine revved above 1200 RPM or it just stalls.
Freaked me out to hell and back being 30 miles from my tools and this happens. As soon as I examined the symptoms in my head I realized what it was. And no SES codes were set. 60 bux later things were back to normal.. 
Feel free to ask me about other symptoms, again just wanted to throw this out here for giggles and see what others come up with. Like I said, it's already fixed.
__________________
 
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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07-20-2006, 09:00 AM
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#2
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AF Fanatic
Join Date: Jul 2005
Location: Marion, Ohio
Posts: 5,147
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Re: What a pain in the keister: Here is a test for you!
A fuel injector clog? What was it?
__________________
- 1997 Acura Integra
- 1993 Toyota Paseo
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07-20-2006, 10:45 AM
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#3
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AF Regular
Join Date: Feb 2005
Location: Chicago, Illinois
Posts: 130
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Re: What a pain in the keister: Here is a test for you!
Idle Air Control Valve
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07-20-2006, 10:55 AM
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#4
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AF Enthusiast
Join Date: Feb 2005
Location: Burbank, Illinois
Posts: 571
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Re: What a pain in the keister: Here is a test for you!
Bad 02 Sensor, or EGR...
TPS or MAF or MAP or LOW Battery Voltage, Bad Ground,, Coil, Fuel pressure regulator.....
Understand that these are the things I would CHECK FIRST, And not just go on a parts buying spree
__________________
1998 BLAZER LS Vin-W 4Dr 2wd
2004 Cavalier LS 4Dr 2.2 Ecotec
"Good Part's ain't Cheap--Cheap Parts ain't Good"
Last edited by DINO55; 07-20-2006 at 05:37 PM.
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07-20-2006, 01:46 PM
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#5
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,553
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Re: What a pain in the keister: Here is a test for you!
Keep on goin guys.... Yer gettin there... And when you do, you need to figure out why it caused the symptoms.... 
(Point of the excercise is to figure out cause and why it causes the symptoms as opposed to just "Throwing Parts and Money" and a problem... Welcome to diagnostics 101 gentleman (and occasional ladies) 
__________________
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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07-20-2006, 01:49 PM
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#6
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AF Fanatic
Join Date: Jul 2005
Location: Marion, Ohio
Posts: 5,147
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Re: What a pain in the keister: Here is a test for you!
Bad cat?
__________________
- 1997 Acura Integra
- 1993 Toyota Paseo
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07-20-2006, 01:54 PM
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#7
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AF Newbie
Join Date: Jul 2005
Location: Lindenhurst, Illinois
Posts: 92
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Re: What a pain in the keister: Here is a test for you!
Ditributor cap or wires.
__________________
98 Blazer LS 4x4 (STOCK)
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.ǝɹǝɥʇ noʎ ʇǝb 11ıʍ pɐoɹ ʎuɐ 'buıob ǝɹɐ noʎ ǝɹǝɥʍ ʍouʞ ʇ,uop noʎ ɟı
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07-20-2006, 02:50 PM
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#8
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AF Regular
Join Date: Mar 2005
Location: Grand Rapids, Michigan
Posts: 264
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Re: What a pain in the keister: Here is a test for you!
My first guess would be a vacuum leak since it's running OK at higher RPM's. But, that wouldn't cost $60 to fix. Unless it possibly had to do with a MAP sensor....
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07-20-2006, 03:26 PM
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#9
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AF Regular
Join Date: Aug 2005
Location: Taneytown, Maryland
Posts: 291
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Re: What a pain in the keister: Here is a test for you!
I'm going to agree with srbianats and go with the dist cap.
__________________
billibong
99 4X4 Blazer LS Vin W
Repairs:
U/L Ball Joints, I/O Tie Rod Ends, New Tie Rod Adjusting Sleeves, New Idler Arm, R & L Front Hubs, R & L Upper CA Bushings, New Gabriel Ultramax Shocks (what a difference)
F & R Brakes and Rotors at 110,000.
Infinity Speakers to replace the blown factory sets.
162K+ and still kicking.
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07-20-2006, 05:10 PM
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#10
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AF Regular
Join Date: Dec 2004
Location: Collierville, Tennessee
Posts: 140
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Re: What a pain in the keister: Here is a test for you!
Was the cable to your MAF unplugged? ha.
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07-20-2006, 05:38 PM
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#11
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AF -Advisor
Join Date: Sep 2003
Location: Sudbury
Posts: 13,565
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Re: What a pain in the keister: Here is a test for you!
He doesn't have a MAF system.
Not a vacuum leak or the rpms would be higher.
Stalling and lower rpms almost makes me thing a PCV valve was plugged.
That or the fuel filter is clogged.
It can't be a sensor seeing it would trip a SES light. I think it was fuel or PCV or a restricted CAT.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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07-20-2006, 05:45 PM
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#12
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IT'S GOOD TO BE THE KING!
Join Date: Dec 2004
Location: The Palace
Posts: 5,523
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Re: What a pain in the keister: Here is a test for you!
I'm sure that it's going to be the last thing that we think of otherwise he wouldn't have started a thread about it. Even so, I'm going to guess a shorted battery, at low rpms the alternator could supply enough power to deal with the battery and provide enough for the electronics, injector, and fuel pump to function properly.
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07-20-2006, 06:04 PM
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#13
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AF Regular
Join Date: Nov 2005
Location: Rogers, Arkansas
Posts: 141
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Re: What a pain in the keister: Here is a test for you!
Id say operater malfunction?....seen as how it took 60 bucks...he prob got drunk on?...lol
__________________
Stock 02 Dodge Ram 1500 Quad Cab
 
Ive tried seeing your point of view, but I cant get my head that far up my astrix.
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07-20-2006, 06:20 PM
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#14
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,553
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Re: What a pain in the keister: Here is a test for you!
Nope. nope, and ,more nope...I'll post the fix tomorrow... Keep on guessing though!
__________________
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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07-20-2006, 07:06 PM
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#15
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AF Newbie
Join Date: Oct 2004
Location: buffalo, New York
Posts: 46
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Re: What a pain in the keister: Here is a test for you!
fuel pump
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