cougar runs lean and idles crazy HELP!!!! December 10, 2008, 06:52:07 PM hey i put a 5.0 ho in my 88 cougar but since then it runs lean and i dont know what it is. also it idles like crazy it surges then goes to normal surges then normal over and over HELP!!!! Quote Selected
cougar runs lean and idles crazy HELP!!!! Reply #1 – December 10, 2008, 08:12:15 PM Run codes yet?What size injectors?SD or mass air?Did you upgrade the fuel pump? Quote Selected
cougar runs lean and idles crazy HELP!!!! Reply #2 – December 10, 2008, 09:30:53 PM sounds like a map sensor or vacuum leak, but if thr rpm's rhythmically go up and down while idling it's usually map related (if you have a speed density setup... i think :)) Quote Selected
cougar runs lean and idles crazy HELP!!!! Reply #3 – December 10, 2008, 09:33:51 PM Check your TPS voltage.(should be between .85-1.0 volts) on the green wire with the key on engine off.How are you checking the A/F??? ( wideband or noise) Quote Selected
cougar runs lean and idles crazy HELP!!!! Reply #4 – December 12, 2008, 02:41:44 PM If it's SD what cam is in it? Quote Selected
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