Problem when going up hills.. Gear heads please help!!!! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-25-2004, 03:15 PM   #1
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Default Problem when going up hills.. Gear heads please help!!!!

I've encountered a problem with my car when going up a slightly steep hill.
When the car is in 3rd gear, and going up a hill, i push the gas a bit to accelerate, and it starts vibrating. The more i push the gas, the more it vibrates and shudders. Also, it doesn't downshift into 2nd unless i put the gas near WOT. Sometimes, if i let off the gas and go to about 50% throttle it will drop into second easily, but usually it just does the same problem as it doesn when climbing the hill in 3rd without shifting.

I can manual shift the car into 2nd and it does so with no effort and it does it smooth.

Another thing, when accelearting froma dead stop, the car makes a faint lower toned whining noise up until about 40km/h then its not noticable, but it gets continually higher pitched as the car accelerates until its not noticeable, even when it changes gears. It sounds alot like the sound of a manual transmission when in reverse, just not as loud.

What could this problem be?? any help at all?

~Matt
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Old 11-25-2004, 03:19 PM   #2
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when was the last time you changed your plug/plugs wires and checked your ignition system? I had the similar situation as your first question.. and it was caused by bad #5 plug wire.. it was open. check those first.

Can't help with your 2nd quesiton bud
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Old 11-25-2004, 03:24 PM   #3
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The last time the plugs were changed was about a month ago.

They are AC Delco'* along with brand new 8mm wires.

Also, the car is a 95 SSEi, with 191km
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Old 11-25-2004, 03:34 PM   #4
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The stumbling climbing a hill is a textbook miss. Check your plugs and measure the resistance of the wires. Get that fixed, then tackle any other symptoms that remain.
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Old 11-25-2004, 03:34 PM   #5
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I had the same problem, and I changed the plugs. Fixed it for a lil while. Sounds like maybe you need to change your fuel filter out? What really fixed my problem was giving my TB and MAF sensor a GOOD off the car cleaning. Since I have done that....The problem has gone away and hasn't returned since. As for question # 2, does it kinda sound like a PS pump? Sounds like a power steering pump to me. But could be way off, maybe the tranny pump? I dunno. Does it do it before the car'* warmed up? If it only make'* the whining noise within the time it takes to get to normal operating temp, then that would really seem like a PS pump...and I think that'* kinda common on GM vehicles because my Chevy pick up is the same way. Check the PS fluid and make sure it'* topped off.
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Old 11-25-2004, 05:44 PM   #6
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To problem #2; you say that it seems to fade at about 40km/h like its drive line related?

can you hear this whine while in park or neutral?

Can you let the car coast down a hill from a dead stop (quiet back road some where) in neutral to see if the noise is still there? Could be the start of a bad bearing? Sometimes this gets worse while turning one or the other. or brake pad that is binding either front or rear?
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Old 12-12-2004, 09:15 PM   #7
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Hey, I found that this was related to dirty injectors in my 93. Such a simple solution that I'd bet you've already looked into it.
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Old 01-16-2005, 08:13 PM   #8
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Sounds just like the trouble my 95 is having. Been through two sets of plugs and wires, and cleaned every sensor I could find. Let me know if you figure it out.
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Old 01-16-2005, 08:15 PM   #9
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Test your coils. Both cold and hot. Techinfo for specs, or better yet, swap all three out from a donor car. Should only take a few minutes to borrow a set.
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Old 01-16-2005, 08:25 PM   #10
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Yeah, I just swapped a set of coils from my pars car. Mostly fixed my miss. Now, it it just briefly in little pulses of three. I then checked my ranny fluid, almost .5L low. I'll add some later and see what happens.
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