Question about 1987 Mercury Cougar
plug the EGR line and see how it acts. better yet put a ball bearing in that line and reconnect it to the EGR and see if it goes away. definate vacuum issue somewhere. tranny modulator, check every line coming off the firewall manifold. the throttle position sensor might need to be replaced. its one of the only moving sensors under there. on my 89 tempo I could adjust my idle, move that idle screw around so it idles up a bit to get it out of that dead area on the TPS. plug wires after that. those notchbacks are getting extremely rare, and with a V8! put it far far away....
Posted on Mar 20, 2011
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Posted on Jan 02, 2017
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