LT1 is sluggish... - Chevy Impala SS Forum
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post #1 of 69 (permalink) Old 02-27-2016, 05:19 PM Thread Starter
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LT1 is sluggish...

It's been sluggish for a couple of months. Almost feels like breaks are slightly applied when I step off gas pedal. I know the possibilities are endless, but what is the most likely culprit? Thanks.

There’s nothing as permanent as a temporary solution.

1995 Cadillac Fleetwood Brougham 118,XXX miles.
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post #2 of 69 (permalink) Old 02-27-2016, 06:18 PM
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It's been sluggish for a couple of months. Almost feels like breaks are slightly applied when I step off gas pedal. I know the possibilities are endless, but what is the most likely culprit? Thanks.

low tire pressure .

sluggish on throttle check back pressure.
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post #3 of 69 (permalink) Old 02-27-2016, 07:02 PM Thread Starter
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low tire pressure .

sluggish on throttle check back pressure.
All tires are at 31 psi. Checking backpressure does not look fun at all. Over six years, the car got sluggish like this a few times, but the problem did go away by itself in a few days or so. This time it just does not go away for more than a month of occasional driving.

There’s nothing as permanent as a temporary solution.

1995 Cadillac Fleetwood Brougham 118,XXX miles.

Last edited by HUF; 02-27-2016 at 07:22 PM.
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post #4 of 69 (permalink) Old 02-27-2016, 07:28 PM
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All tires are at 31 psi. Checking backpressure does not look fun at all. Over six years, the car got sluggish like this a few times, but the problem did go away by itself in a few days or so. This time it just does not go away for more than a month of occasional driving.
could be the brake calipers are sticking. drive a couple of miles with light braking then carefully check to see all the brake rotors are the same temp. if one or two are hotter then that is the one sticking.

years ago I had the rear cal pins get stuck ..
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post #5 of 69 (permalink) Old 02-27-2016, 07:36 PM Thread Starter
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could be the brake calipers are sticking. drive a couple of miles with light braking then carefully check to see all the brake rotors are the same temp. if one or two are hotter then that is the one sticking.

years ago I had the rear cal pins get stuck ..
Thank you. Brakes were going to be the first thing to check. This is a Cadillac, so the rear ones are drum (and I hate them).

There’s nothing as permanent as a temporary solution.

1995 Cadillac Fleetwood Brougham 118,XXX miles.

Last edited by HUF; 02-27-2016 at 07:48 PM.
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post #6 of 69 (permalink) Old 02-28-2016, 07:37 AM
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Thank you. Brakes were going to be the first thing to check. This is a Cadillac, so the rear ones are drum (and I hate them).
You got comparatively a lo-miler there. Depending on long you plan on keepin' it you might consider amortizing the 700 smacker cost for discs. As Dave Bowman said in '2010', "It's Wonderful!"

By the 20th post this guy found it was a cat.
http://www.ls1lt1.com/forum/lt1-%7C-...luggish-2.html

Although I wouldn't rule out one or more maint. type items on or near the engine that are getting up there in age.

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post #7 of 69 (permalink) Old 02-28-2016, 08:02 AM
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Thank you. Brakes were going to be the first thing to check. This is a Cadillac, so the rear ones are drum (and I hate them).
living up here the front calipers could be sticking esp in the cold temps. drums most likely not the problem but still check possible a spring issue .

on the front calipers I unbolt from the control arm then push down on the brake pedal to see if both pistons move about the same. just don't push too much because you do not want the pistons to fall out.
hard to put back in !!then using a C clamps push back in see if the push back easy ..

loosen the master cyl fill cap cover . good time to bleed them also.

if you find sticking make sure the replacements do not stick new can be bad .
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post #8 of 69 (permalink) Old 02-28-2016, 10:57 AM
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Since you have rear drums check the ebrake and cables.
I've had an ebrake freeze up after washing the car in below zero temps.

Also the cables get rusty and seize up, so if they are applied they may not release correctly.
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post #9 of 69 (permalink) Old 02-28-2016, 04:18 PM Thread Starter
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Thank you for the replies, gents. As soon as it is warmer I am going to take the wheels off and check everything.

Not considering discs. The car is rarely driven. By the way, the ABS light is ON all the time. I think the brakes (rear or front) drag a bit and produce excessive dust which messes up wheel speed sensors.

Do you think this floor jack is powerful enough for a two-ton Cadillac?
http://www.homedepot.com/p/Pro-Lift-...stomer_reviews

There’s nothing as permanent as a temporary solution.

1995 Cadillac Fleetwood Brougham 118,XXX miles.

Last edited by HUF; 02-28-2016 at 04:22 PM.
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post #10 of 69 (permalink) Old 02-28-2016, 04:30 PM
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Honestly, I think you'll be tons happier with a legit old school Lincoln / Hein Warner. Yah, they're $250+, but also bulletproof, trustworthy, stable footing.

Of course you can get by with that little one, - leaves more for really really good jacks.

Last edited by 96 Black; 02-28-2016 at 04:34 PM.
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