Rough Idle

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txplayboy001

New Member

Nov 30, 2004

47

0

0

Nov 30, 2004

#1

• Nov 30, 2004

• #1

Just bought this one last week, working through the bugs and nic nacs.

1992 5.0 LX

Just did a COMPLETE tune up. Put a new MSD coil in. Had the fuel system cleaned. Throttle body and intake has been cleaned. No codes. Runs great during acceleration and crusing. Completely stock motor. Has K&N, dumped flows.
I am having a problem at idle. Very rough idle. Any ideas?

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

2,120

2

59

windsor, Canada

Nov 30, 2004

#2

• Nov 30, 2004

• #2

Vac leak

 

8

87'GTstang

New Member

Feb 16, 2004

1,025

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0

Nov 30, 2004

#3

• Nov 30, 2004

• #3

Run a vacuum test to see if you are pulling the industry standard of around 15"-22" hg first. What rpm does the engine idle at? Lastly, is it a stock cam or heads ect. - basically are all the major induction/power components stock?

 

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txplayboy001

New Member

Nov 30, 2004

47

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0

Nov 30, 2004

#4

• Nov 30, 2004

• #4

Motor is completely stock. I did fix two vaccum leaks. (those damn flimsy plastic vaccum lines) I could not find any more leaks. I will put a gauge on it to be sure.

 

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txplayboy001

New Member

Nov 30, 2004

47

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0

Dec 1, 2004

#5

• Dec 1, 2004

• #5

87'GTstang said:

Run a vacuum test to see if you are pulling the industry standard of around 15"-22" hg first. What rpm does the engine idle at? Lastly, is it a stock cam or heads ect. - basically are all the major induction/power components stock?

Click to expand...

I have 19 hg vaccum. I fugure thats good enough. Any more suggestions?

 

shttygtstang

New Member

Jun 2, 2004

978

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Dec 1, 2004

#6

• Dec 1, 2004

• #6

clean your iac see what your tps voltage is does it have a cam ....spray carb cleaner around the intake see if the idle picks up if it does you have a leak

 

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txplayboy001

New Member

Nov 30, 2004

47

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0

Dec 1, 2004

#7

• Dec 1, 2004

• #7

No Leaky

shttygtstang said:

clean your iac see what your tps voltage is does it have a cam ....spray carb cleaner around the intake see if the idle picks up if it does you have a leak

Click to expand...

No leaks anywhere. Sprayed all around the intake and all vaccum connections.
Also, cleaned iac, don't have a meter with me today for the tps.