I'm tuning up the Mustang. It seems to be lacking power on take off and doesn't run smooth. Not a dead miss though. It also seems to be idled high. You can audibly hear it's idled high and when I put it in gear it jumps. (automatic) Anyway when I get on the highway and open her up she runs great! I went to my nearest auto store to buy parts, I asked the guy what all I would need. He said the usual which I already know. Plugs, wires, air filter, fuel filter. But I thought I would ask Mustang pros who know more than this guy (and me). Is there anything else I might do to fix this problem? It's my daughter's car and I REALLY want it running dependably and help fuel mileage. Thanks!

 

Hi, welcome. We are not PRO, but a lot of good info to use on this site. On the high idle, check all the vacuum lines for cracks /holes. Check EGR valve and the ICA,TPS. All of them are bolted to the throttle body. Both EGR,IAC you can try to clean out. If the car is a GT, you have coil on plug, so no wires. Everything Else seem OK. IMO i would try to stay with using stock OEM type parts.Also check tranny fluid. If needed change filter and fluids. Post how it worked, and more people will post back.Good luck