01-23-2011, 11:53 PM
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#1
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GX Member
Join Date: Mar 2010
Location: Wylie,TX
Posts: 131
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Random Hesitation @ different speeds
Ok so Ive looked around the forum and found 1 thing that i thought was causing the hesitation (fuel filter) got that changed and it still does it. Took it to a shop and the guy there couldnt find a thing wrong saying it could be bad gas or water vapor? Drove it back and forth for 2 days nothing happened then the next day it happened a few times at different speeds and at different pressures on the gas petal.
So whats the deal? Any clues as the where to look next?  |
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01-24-2011, 12:28 AM
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#2
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GLS member
Join Date: Sep 2009
Location: Maui
Posts: 1,797
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dying fuel pump possibly, or sticky injectors. There's a whole list of things it could be
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01-24-2011, 04:47 AM
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#3
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GLS member
Join Date: Aug 2010
Location: indy
Posts: 8,411
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Had the same problem. Could never figure it out.. do your rpms jump too? Mine stopped it a month ago hasn't done it since. Its weird it did it for about 4 months then stopped.
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Meet Destiny, shes a 2001 Oldsmobile Alero GLS, F40 6MT swap. (#2 of 3)
2/24/14 - 200,000 miles body/motor. 22,300 on F40.
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A girl touched my Pee Pee. So you can say things are getting pretty serious for me.
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01-24-2011, 09:57 AM
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#4
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GX Member
Join Date: Mar 2010
Location: Wylie,TX
Posts: 131
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Quote:
Originally Posted by Ttop191
dying fuel pump possibly, or sticky injectors. There's a whole list of things it could be
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Never heard of a ful pump acually kicking it on an Alero, but Im sure its possible. What would make an injector sticky to the point of failing to delilver gas? And how would u be able to tell which one? Or could it be the electrial connection going bad to the injector. But wouldnt that just make it just misfire?? |
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01-24-2011, 09:58 AM
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#5
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GX Member
Join Date: Mar 2010
Location: Wylie,TX
Posts: 131
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Quote:
Originally Posted by sleepyalero
Had the same problem. Could never figure it out.. do your rpms jump too? Mine stopped it a month ago hasn't done it since. Its weird it did it for about 4 months then stopped.
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Somewhat ya the rpms do go up a bit. Mine is cold stock so Im not sure If you and I are having the same issues. |
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01-24-2011, 11:17 AM
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#6
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GLS member
Join Date: Sep 2009
Location: Maui
Posts: 1,797
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a sticky injector could have just been caused by dirty fuel, if its just a little sticky and not completely stuck it would take slightly longer for it to open, and therefore a delay in receiving the fuel, and also less fuel to be delivered since the injector isn't open for as long
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01-24-2011, 11:27 AM
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#7
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GLS member
Join Date: Apr 2010
Location: Valley City, ND
Posts: 999
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He said it's at certain pressures on the throttle, could it be something to do with the TPS? Just a thought.
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2003 Alero GL2 LA1: pacesetter cat back, Energy Speed WAI, Magnaflow downpipe/cat, tinted tail lights, and polished letters on intake manifold.
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01-25-2011, 12:34 AM
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#8
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GX Member
Join Date: Jun 2010
Location: Madison WI
Posts: 188
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Quote:
Originally Posted by TxAlero
Never heard of a ful pump acually kicking it on an Alero, but Im sure its possible. What would make an injector sticky to the point of failing to delilver gas? And how would u be able to tell which one? Or could it be the electrial connection going bad to the injector. But wouldnt that just make it just misfire??
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I dont know what motor you have, but on the 3400, ive gone through two pumps, and have a spare ready. They definately do go out on aleros. My random misfire ended up being bad wires, one was taking 14500 ohms, the new one was at 3000 ohms.
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"How did you MELT the spark plugs!?" 
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01-25-2011, 08:13 PM
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#9
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GLS member
Join Date: Nov 2007
Location: Indiana
Posts: 3,201
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Quote:
Originally Posted by hotrodwolf
My random misfire ended up being bad wires, one was taking 14500 ohms, the new one was at 3000 ohms.
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GEEZ!
@Op... I would deff check your TPS. Are you not throwing any codes? |
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01-25-2011, 11:09 PM
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#10
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GX Member
Join Date: Jun 2010
Location: Madison WI
Posts: 188
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The guy before me must have gotten very cheap wires, they looked pristine and new, but alas, they sucked
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"How did you MELT the spark plugs!?"
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01-27-2011, 12:30 AM
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#11
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GX Member
Join Date: Mar 2010
Location: Wylie,TX
Posts: 131
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well I finally got an answer to why my engine was stalling and hesitating. The ICM has gone belly up. So I will be replacing that along with 3 new coil packs and spark plug wires to boot. 
All at the sum of 240$.  |
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01-27-2011, 12:55 AM
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#12
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GX Member
Join Date: Jul 2010
Location: calgary
Posts: 211
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are you running a K&N filter if so clean your Mass air flow sensor thats caused weird surging in my car
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parts so far: 10000k hid heads and fogs, alpine INAW900, bluetooth, backup camera, alpine mrp-m2000, 18fi btl, 270amp mechman alterntor, 2 Redtop Batt's, all LED lights and color changing signals white/amber (every bulb other then dummy lights) and limo back 3 and 20% in the front and tinted tails
check out my car http://www.youtube.com/user/scott192
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Well I know my car is female because she was bleeding for 7 days and didnt die!
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01-27-2011, 12:56 AM
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#13
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GX Member
Join Date: Jul 2010
Location: calgary
Posts: 211
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haha i must read^^
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parts so far: 10000k hid heads and fogs, alpine INAW900, bluetooth, backup camera, alpine mrp-m2000, 18fi btl, 270amp mechman alterntor, 2 Redtop Batt's, all LED lights and color changing signals white/amber (every bulb other then dummy lights) and limo back 3 and 20% in the front and tinted tails
check out my car http://www.youtube.com/user/scott192
Quote:
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Well I know my car is female because she was bleeding for 7 days and didnt die!
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