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

Tiny
JDTEAGUE1
  • MEMBER
  • 1994 FORD PROBE
  • 160,000 MILES
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?
Thursday, March 8th, 2012 AT 10:31 PM

4 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Thursday, March 8th, 2012 AT 11:25 PM
Tiny
JDTEAGUE1
  • MEMBER
  • 3 POSTS
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
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Monday, March 26th, 2012 AT 4:01 AM
Tiny
JDTEAGUE1
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Where are EGR valve and idle control valve located?
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Monday, March 26th, 2012 AT 4:16 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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
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Monday, March 26th, 2012 AT 3:16 PM

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