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To the left of the engine, on top of the intake manifold, under the air intake. Follow the big Aluminium tube from the air filter. The Throttle Body is below that. It houses the Fuel injector, and on the outside, TPS, and fuel pressure regulator, among many other bits and bobs. It is a glorified Carburetor! :-) Here http://www.rocky-road.com/1600swap.html this is a pic of the 1.3 liter engine, air filter on the left bottom, tube going to carb the Sidekick is opposite, air filter on right, tube going over engine to Throttle body. (Thanks Summit/Rocky Road!)
Valve cover gaskets are below the tinny covers over the heads. Never worked on a V-6 Vitara, but here is a pick of a Chevy 350. http://www.enginefactory.com/350massflo.htm where it says Chevrolet with the chevy sign, those are the valve covers.Usually only a few bolts to pull off, gaskets are cheap. ANyone with a better pick?
Hmmm, if the battery was disconnected for a long time (more than an hour) yes. Fire up the vehicle, let it warm, then drive the crap out of it! You will have it die at lights/stops. After a few, it will re-learn everything. Same issue on 2007 SX-4 and 2001 and 2002 Vitara.
Shocks inside of springs, use many muffler clamps when the vehicle is on its' wheels to hold the springs in compression. No experience on the Grand, but simple on the regular Vitara. I would hose off the underside of the vehicle first, as dust falling from undercarriage is a P.I.T.A for your eyeballs! Use Moove-It (Not WD-40) on the bolts/nuts first to prevent stripping if they are rusty. Remember, use jack stands,wheel chocks, e-brake and common sense when working under a vehicle!
Jack the vehicle up, grab the top of each wheel and the bottom, push the top in and pull the bottom out, do you hear the noise? If so, bearings, pull/push left and right side, tie rods. The Vitara 4 door suffers from sway bar pop out under extreme articulation with over sized tires, is very common, replace the stud that holds the sway bar in place on each side, about $70 Canadian including tax, and about 1 hour for someone with no experience to do. Best guess, no experience on the XL7 however :-(
Loose connection to the main relay/fuse block in the engine compartment. Common on all Sprints/Sidekicks/Swifts. Remove the relay fuse block, look at where the positive power from the battery enters it, bet you'll see loads of carbon!
First off, do you have cruise control? Did you inadvertently turn it on? Secondly, were your floor mats in the correct place? I have had this happen too me on many small Japanese vehicles, and 9 out of 10 times, it was my size 12 feet and big boots that where the problem (Hit the brake and gas at same time!), once in a Samurai, it was a floor mat issue, once in a Chevy Beretta it was an accidental cruise control engagement (My sausage fingers caused it)