Had state ispection yesterday. Now car runs rough and idles high,low but sometimes ok. What could cause?

1994 FORD PROBE
160,000 MILES
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JDTEAGUE1
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after state inspection car began running rough-felt like it was losing power a little but keeps on running. Does not accelerate smoothly. Also idles erractically, high,low, sometimes dies but sometimes ok. Could inspectors have done something to cause this?
Mar 8, 2012 at 10:31 PM
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HMAC300
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get soem choke cleaner and claen both sides of throttle plate with it. also the iac valve hole. then make sure that the duct work going to tp has no holes in it or isnot disconnected someplace. see if that cures it. also look for any hose off like valve covers, air cleaner,etc.
Mar 8, 2012 at 11:25 PM
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JDTEAGUE1
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haven't cleaned throttle plate yet but did replace plug wires. engine idleing good but when accelerating(esp.on incline) there is hesitation but will pick up speed once i ease off petal then ease back on
Mar 26, 2012 at 4:01 AM
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JDTEAGUE1
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where are EGR valve and idle control valve located?
Mar 26, 2012 at 4:16 AM
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HMAC300
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the egr will either be on te center of the rear of engine or passenger side at rear depending on whic engine you have. iac valve is on throttle body
Mar 26, 2012 at 3:16 PM
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