Rough running Roush 427R

[patrickt]

Originally Posted by Goopie 18

Following Patrick's advice, I cleaned the air holes on my Holley and the problem is solved. If I had done this first, lots of time and $ would have been saved. Thanks to all (especially Patrick).

OK, you might now consider sending both RodKnock and ERAChas PMs referring to me as "God's Gift to Motorsports" and telling them that they should be nicer to me on all of their posts.

[D111]

I checked mine for the heck of it even though It Wasn't really running rough. Used a can of spray air and it would not blow through after spraying cleaner The canned air blew through nicely.



Thanks

[D111]

Would it be that the idle mixture screws would now need Readjusting?

It seems after clearing the air bleeders the car will not idle as low and smooth.
As I said in previous post the car was idling and running fairly well I just wanted to see if those Air bleeds were clogged and they did seem so.

[patrickt]

Originally Posted by D111

Would it be that the idle mixture screws would now need readjusting?

Yes. Move the screws all the way in until they lightly seat, back both out about 1 and 1/4 turns (equally on both sides), put the vacuum gauge on the manifold fitting, usually at the base of the carb in the front, adjust both sides in equal increments until you get your highest vacuum, then turn each in about an 1/8th of a turn. Then adjust idle. N.B., if the air bleeds were partially clogged and you had adjusted stuff to compensate for that, then the settings will be out of whack when the bleeds are clean. After you've adjusted it, if you have vacuum secondaries, put a zip tie marker on the shaft and take it out and WOT throttle it. Then look and see if the secondaries fully opened.

[D111]

Originally Posted by patrickt

Yes.

sent you a PM