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pinging problemhey guys just want to say great site lot of good info helped me out a few times but i have a problem i have a 97 f150 2wd 5sp 4.6 it has a pinging problem it threw out a code for low flow egr i replaced the egr vacum selinoid it put the light out and took away some of the pinging but when you drive on the highway it comes back realy bad but only when you step into it when you step into it.the temp never goes to halfway and the cats dont seem to get real hot.it also has a problem with the rpms staying up between shifts but idles down fine when stoped any info would be greatly apreciated thanks.
