Bucks in first when cruising in a parking lot

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12-29-2012, 07:36 PM

94redGTConv

2nd Gear Member

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Location: Tennessee

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Bucks in first when cruising in a parking lot

My 94 gt bucks when I'm in first while cruising down a strip mall or so, could it be an Aftermarket cam? Or a problem?

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12-29-2012, 07:48 PM

mattdel

6th Gear Member

Join Date: Nov 2006

Location: Spfld, MA

Posts: 9,240

Clutch glazing most likely. When the disc slips for a few hundred milliseconds, it produces an engine surge.

12-29-2012, 09:01 PM

94redGTConv

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Okay, so how can I check that?

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12-31-2012, 10:12 AM

Duncan_GT

4th Gear Member

Join Date: Jun 2011

Location: Indy

Posts: 1,353

Quote:

Originally Posted by 94redGTConv

Okay, so how can I check that?

Inspect your clutch. Mine does that too, but I know my clutch is shot

01-01-2013, 04:11 AM

94redGTConv

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Join Date: Sep 2012

Location: Tennessee

Posts: 161

Quote:

Originally Posted by Duncan_GT

Quote:

Originally Posted by 94redGTConv

Okay, so how can I check that?

Inspect your clutch. Mine does that too, but I know my clutch is shot

Gotcha

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01-01-2013, 09:57 PM

sharpe351

Join Date: Oct 2012

Location: FL

Posts: 4

Quote:

Originally Posted by 94redGTConv

My 94 gt bucks when I'm in first while cruising down a strip mall or so, could it be an Aftermarket cam? Or a problem?

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If you have an aftermarket camshaft, it will "lurch" when idling through a parking lot. Mine does it really bad, but I have a very aggressive camshaft.

If you have an aftermarket cam, do you know the camshaft specs?

If you were experiencing a "chatter" from your clutch, it would do it only when taking off from a stop. If it is happening when rolling around a parking lot in 1st at an idle, then it's the camshaft.

01-02-2013, 01:36 AM

94redGTConv

2nd Gear Member

Thread Starter

Join Date: Sep 2012

Location: Tennessee

Posts: 161

Quote:

Originally Posted by sharpe351

Quote:

Originally Posted by 94redGTConv

My 94 gt bucks when I'm in first while cruising down a strip mall or so, could it be an Aftermarket cam? Or a problem?

Posted from MustangForums.com App for Android

If you have an aftermarket camshaft, it will "lurch" when idling through a parking lot. Mine does it really bad, but I have a very aggressive camshaft.

If you have an aftermarket cam, do you know the camshaft specs?

If you were experiencing a "chatter" from your clutch, it would do it only when taking off from a stop. If it is happening when rolling around a parking lot in 1st at an idle, then it's the camshaft.

That's what I thought, and I have no idea the guy I bought it froms dad put it in and died a week after I bought it. Sounds fishy, but I saw it in the paper. Yes its a lurch its a lopy consistent one to, it'll cruise then lurch cruise....... lurch.

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01-02-2013, 09:26 AM

sharpe351

Join Date: Oct 2012

Location: FL

Posts: 4

Quote:

Originally Posted by 94redGTConv

Quote:

Originally Posted by sharpe351

Quote:

Originally Posted by 94redGTConv

My 94 gt bucks when I'm in first while cruising down a strip mall or so, could it be an Aftermarket cam? Or a problem?

Posted from MustangForums.com App for Android

If you have an aftermarket camshaft, it will "lurch" when idling through a parking lot. Mine does it really bad, but I have a very aggressive camshaft.

If you have an aftermarket cam, do you know the camshaft specs?

If you were experiencing a "chatter" from your clutch, it would do it only when taking off from a stop. If it is happening when rolling around a parking lot in 1st at an idle, then it's the camshaft.

That's what I thought, and I have no idea the guy I bought it froms dad put it in and died a week after I bought it. Sounds fishy, but I saw it in the paper. Yes its a lurch its a lopy consistent one to, it'll cruise then lurch cruise....... lurch.

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That's the cam for sure. The thing I do is to ease along then push the clutch down. It's more tedious, but gets the job done.

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01-02-2013, 10:04 AM

dawson1112

5th Gear Member

Join Date: Jul 2012

Location: ohio

Posts: 3,628

I think what you are experiencing is the play in the drive line. since it is idling in 1st the engine is not exerting force on the drive line constantly because the rpms are lower . The drive line gets ahead of the engine rpm the engine then catches up as the car slows again. My 94 does this also in first with the engine at idle. I have a good clutch and I have a stock cam. In second gear idling it stops doing this because the gear ratio in the trans and rear diff are high enough now that the engine keeps a constant force on the drive line.