High Speed mis

TD68302

New Member

Jul 29, 2007

57

0

0

Arvada, CO.

Aug 26, 2007

#1

• Aug 26, 2007

• #1

Took out the stang last night and took it up on the highway for about 15 miles or so, but I noticed that I was having a hi speed mis (not in mph, but in rpm). I was driving about 30 mph and felt it, dropped it down in to 2 gear, brought rpm's up and really noticed it.

Any Ideas?

I did hear my rockers clicking, could this be the problem? Plugs a little carbon fouled just from sitting in garage idling so much.

 

ratio411

Founding Member

Apr 21, 2002

3,870

73

109

Pensacola FL

Aug 27, 2007

#2

• Aug 27, 2007

• #2

Does it feel like it is 'holding back' or does it make a slight popping from the exhaust when your foot is in it steady?

Could be lean surge.
If so, bump up the jets 2 or 3 sizes.

 

CraigMBA

New Member

Mar 24, 2007

783

1

0

Orange, CA

Aug 27, 2007

#3

• Aug 27, 2007

• #3

I'd do a plug check first, and if you see anything abnormal, pull the valve covers off and inspect the offending cylinder first.

 

S

Soaring1

Banned

Jan 3, 2003

144

1

0

Texas

Aug 27, 2007

#4

• Aug 27, 2007

• #4

May as well do a compression test while you are at it.

 

TD68302

New Member

Jul 29, 2007

57

0

0

Arvada, CO.

Aug 27, 2007

#5

• Aug 27, 2007

• #5

ratio411 said:

Does it feel like it is 'holding back' or does it make a slight popping from the exhaust when your foot is in it steady?

Could be lean surge.
If so, bump up the jets 2 or 3 sizes.

Click to expand...

No popping from the exhaust