stock 3.8L in 89 cougar Vs. 92 t-bird June 06, 2010, 04:07:53 PM Ive got a 89' Cougar LS and my mom has an 92' T-bird both are runnin the same stock 3.8L Esshag. Why does mine not have an IAT but the T-bird does?I also am wondering if i put platnium or iridium plugs with the stock gap settings would cause a high idle? Quote Selected
stock 3.8L in 89 cougar Vs. 92 t-bird Reply #1 – June 06, 2010, 05:01:44 PM Do you mean the MAF (mass airflow sensor)? 89 T-Birds and Cougars did not use the MAF system, they used speed density (just like 86-88 T-birds, Cougars and Mustangs). 91+ Thundercats had the mass air system.Also, aftermarket plugs would not cause a high idle. There are about a million things that could, but plugs isn't one of them. Your best bet is to pull codes. Quote Selected
stock 3.8L in 89 cougar Vs. 92 t-bird Reply #2 – June 06, 2010, 05:26:33 PM Pull codes, and check the IAC Quote Selected
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