Rough Idle

[txplayboy001]

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]

Vac leak

 

[87'GTstang]

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?

 

[txplayboy001]

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.

 

[txplayboy001]

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?

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

 

[shttygtstang]

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

 

[txplayboy001]

No Leaky

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

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.