Too long to start

I have a 2012 4 banger idles and runs good.I recently changed the plugs and plug wires.I bought it used with 120,000 miles now I have 174,000 miles on it.From day one when I go to start it.It'll go about 5secs I guess cranking before it starts.It'll start fine it seems a little too long.My wife has a 2012 Highlander with a 4 banger when you turn the key starts immediately.

 

I have always thought that my 2014 2.7 started kinda lazy. Don't know why and it does always start. I'll be interested in the responses to this. My 2014 only has 27k on it.

 

I forgot to put I also checked codes nothing came up.It idles and runs great especially for having that many miles on it.What kinda mpg are you getting with yours.I'm averaging around 20 mpg highway on a 2hr round trip commute.

 

I get about 18.5 on the highway and slightly better around town. Yes, I said slightly better in town. That is because I have 4.88 gears which keep RPMs high at 70+ mph. My mpg wouldn't really tell you anything because I have 33" tires, 4.88 gears, 4x4, LCE header, and such.

 

Try to put some injector cleaner with your fuel. That may help. Clean out out the throttle body too if you have never done that.

 

Could be fuel pressure related. With the engine cold, start it up, let run for 10-15 seconds, then turn off. Start it back up in 5-10 seconds. Does it fire up immediately? If so, loss of fuel pressure may be the problem.

So when the truck sits for a period of time, it's losing pressure in the fuel system. Most cars need 44 psi, so the lengthy cranking is due to the fuel pump building the pressure back up. By it starting right back up after 10 seconds, not enough time has passed for it to lose pressure, so it remains normal, so no excessive cranking.

Typically loss of pressure is the pump, regulator or vacuum leak. (im assuming you are not smelling gas...)

This is a best guess... The sure way to know if you're losing fuel pressure is to hook up a fuel pressure gauge.