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Car Engine Missing? Tranny?
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Trx_Racer
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PostPosted: Tue Nov 03, 2009 2:14 am    Post subject:  Car Engine Missing? Tranny? Reply with quote

Good Evening,

Its been a while since i have posted anything, due to life in general.

My SS has been acting very different lately, We just got back from a trip to Oregon, before leaving it seen to hesitate or miss when going over a small overpass or light throttle pressure. I spoke with a couple of buddies and they suggested that i needed replace the fuel filter.

While i was driving north it noticed getting worst as we climbed up and down mountain passes, so after a day in Oregon the lady and I figured we should at least get the filter replaced at a local GM dealership. I would have thought that would have fixed it, but no luck. It has since spent a day at my local GM dealership and after spending a full test day nothing was found.

I'm hoping that someone on this forum has had this unfortunate problem, and give me a heads up on what maybe be happening before it leaves me and the lady on the side of the road.

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shagnwagon
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PostPosted: Tue Nov 03, 2009 10:16 am    Post subject:   Reply with quote

Any codes?
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Trx_Racer
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PostPosted: Tue Nov 03, 2009 1:10 pm    Post subject:   Reply with quote

nope, no codes. this is what has me asking on this forum..

Thanks...

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wanderson75
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PostPosted: Tue Nov 03, 2009 1:34 pm    Post subject:   Reply with quote

Did they check the cat?

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Trx_Racer
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PostPosted: Tue Nov 03, 2009 2:53 pm    Post subject:   Reply with quote

i don't believe they did, i had the cat go bad on my once before on a LS model.

maybe, ill have them check that....next

thanks, just trying to find a cause before i end up on the side of the road.

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EricJ
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PostPosted: Sun Nov 08, 2009 11:02 pm    Post subject:   Reply with quote

Our '03 had a code for a Lean mixture. replaced the fuel pressure regulator, the fuel filter. Idiot light came back on within a few miles. I borrowed my brother's demo scanner and it gave the same codes our AZone $80 cheapie did. I cleared them out and while checking for loose vacuum hose I saw the hose right before the throttle body (the solid plastic one dead center next to a sensor plug) and decided to see where it led to. It ends left of the tranny dipstick and under the coil packs (3.4 L). The end was hanging there out of a hole where I think a gasket or an O ring had been. Does anyone have a name or part number for the gasket?
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snook
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PostPosted: Sun Nov 08, 2009 11:41 pm    Post subject:   Reply with quote

I'm no genius for sure, but if its a miss I would start with the plugs, wires, and coil packs. Eliminate all of them, and then try the fuel stuff. If you haven't changed the plugs and wires on it, its probably due anyw ay...
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EricJ
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PostPosted: Sun Nov 08, 2009 11:48 pm    Post subject:   Reply with quote

I don't mean to hijack this thread. Sorry. Ours is at 74,000 plus, so I'll look into tuneup.
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NUTSgoWEEE
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PostPosted: Mon Nov 09, 2009 3:21 am    Post subject:  Re: Car Engine Missing? Tranny? Reply with quote

Trx_Racer wrote:

My SS has been acting very different lately, We just got back from a trip to Oregon, before leaving it seen to hesitate or miss when going over a small overpass or light throttle pressure. I spoke with a couple of buddies and they suggested that i needed replace the fuel filter.


A missfire usually sets a code off. Do you have any other description of the problem? Like noises or what it feels like?

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tstephens11
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PostPosted: Mon Nov 09, 2009 3:26 am    Post subject:  Re: Car Engine Missing? Tranny? Reply with quote

NUTSgoWEEE wrote:
Trx_Racer wrote:

My SS has been acting very different lately, We just got back from a trip to Oregon, before leaving it seen to hesitate or miss when going over a small overpass or light throttle pressure. I spoke with a couple of buddies and they suggested that i needed replace the fuel filter.


A missfire usually sets a code off. Do you have any other description of the problem? Like noises or what it feels like?

Not necessarily, I have a misfire, but I'm not setting off any codes. I checked for codes today when I was scanning my car.

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EricJ
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PostPosted: Mon Nov 09, 2009 8:27 am    Post subject:   Reply with quote

This should prove to be an interesting search for google. I'm curious. Confused2
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firestorm
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PostPosted: Mon Nov 09, 2009 10:11 am    Post subject:   Reply with quote

Are the symptoms present going downhill? ...or does it only hiccup when lugging up a hill? At relatively low RPM, while going up a steep grade, it's possible that the TCC (Torque Converter Clutch) could be disengaging and quickly re-engaging. I've experienced that on a good number of cars, and will usually take the vehicle out of OD on hilly roads.

That behavior shouldn't change though, and I'm guessing you're noticing a difference on familiar roads.

Otherwise, I would make sure everything is in good tune (plugs, wires, coils) and then look at the fuel system. Maybe even run some fuel system cleaner through it to clean the injectors; I'm a fan of Seafoam myself.

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Danny_9C1
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PostPosted: Mon Nov 09, 2009 7:34 pm    Post subject:   Reply with quote

I know this sounds stupid BUT....

Seeing as how you have an SS,it could be just your stiff front struts making it "feel" like a slight misfire when you are going over bumps/slight dips in the road,esp during acceration.I get this feeling in my 9C1 sometimes.

You will notice that depending on outside temp the road will be smooth or seem rather rough,esp if you have a stiff suspension.....The road will contract or expand depending on the outside temp.If its warm out than the road will seem rather smooth,if its cold out than the road will contract and seem rather rough.

This is just my foolish theory,IDK....

BTW,are you you feeling this slight misfire ALL the time or at just certain times? Are their times you feel it more than at other times?

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ZeeVert
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PostPosted: Mon Nov 09, 2009 11:34 pm    Post subject:   Reply with quote

I mention this only because I just fixed a nasty hesitation problem on a friend's 2000 Montana with no codes (after we changed the plugs and wires).
It's cheap and easy to try... clean the MAF sensor.
It seems to me that the dirty MAF sensor usually turns up on higher mileage cars or cars with oily K&N air filters.
I use the CRC? MAF sensor cleaner. I get it at Autozone.

Again, might not be the problem, but cheap to try.

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PostPosted: Sun Nov 15, 2009 8:56 am    Post subject:  Engine Misfire Low RPMs Uphill Reply with quote

I had the same problem with my 2002 LS (73,000), Engine Misfire driving at Low RPMs Uphill.I changed the fuel filter and cleaned MAF sensor, but still had the misfire. Eventually,I had code P0303 I think- misfire cylinder 3.

After changing the spark plugs and wires, the misfire went away, so I conclude that my misfire (only occurred when going uphill with low RPM) resulted from a bad spark plug wire.
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