Originally Posted by Mikeywalsh
I have shorty headers on it. A cold air intake system. A holly 90 mill throttle body with a bbk plenum. I've owned the vehicle for about 10 years now. There is roughly 200,000 kms on it. It's a 5 speed. I run her pretty good. Lol
---------- Post added at 06:30 PM ---------- Previous post was at 06:28 PM ----------
I put top of the line iridium plugs in it around 150000 kms
I would pull the plugs and see if they show signs of running hot--even if they don't i would replace them with a set of Motorcraft AGSF-32-PM, or Champion 3401 single platinum plugs.
I have to ask, why such a huge TB? Unless you are running one whole lot of boost (which would mean the iridium plugs are a very bad choice) it is unnecessary and will actually hurt WOT performance--70 mm is all any n/a 4.6L 2V needs, on a non-PI engine like your '97 the stock 65 mm is plenty big.
What engine mods do you have?
- 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.
New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq