ok .. So my S with an R motor project is stressing me out. Runs like crap, back fires won't keep an idle.. I've synched the tps checked all vacuum lines, cleaned the air filter.. I'm doing the spark plugs and gas filters on Monday when I get back.. Any other ideas? It will not idle without stalling and when I'm on the gas it backfires.. THe choke doesn't make a difference almost like it doesn't work..