New guy here so bare with me...
I recently purchased a used G35 with 130k on the clock. When I drove it the 600 mile trip home I noticed a few things I didn't notice or didn't hear on initial test drive. When starting from a stop I get a growl or vibration quite hard to explain but will go away if I let up on the gas pedal and depress it again. I has happened a handful of times so obviously a problem there and when I brought it to a mechanic and let him take it for a test drive he thought maybe a bad mount but motor isn't flexing or lifting so I wanted to get your guys idea on what may cause it or if someone else ran into the problem before.

As well the problems don't stop there. The car has been lowered and a noticed that the upper a arm ball joint has play. Like they left the ball joint sleeve out so I'm looking to replace the buckle and put a good set of a arms in place but looking for a set that they ball joints are replaceable in the future just in case as well with keeping budget in mind.

Well if that wasn't enough I have long crank times. For example if I try to start the car it will crank but not start but if I try a second time it will start after a few cranks. Does it every time so any and all advise for any of these problems would be greatly appreciated.

 

Where does the vibration come from, if you can pinpoint it.
Is it auto or 6MT?
Lowered cars will cause more stress on joints and bushings so that is just a matter of time for replacement...I'd look into doing a full swap of them to prevent future issues.
Is the car throwing any codes? How old is the battery? Have you gotten it tested?
Lots more questions to be asked to help diagnose.

 

Can't really pinpoint where the vibration is coming from yet feels like the front of the car if I were to guess.it did throw a ses light on during my drive home but since then has gone out so not a hard set code but will be scanning it today to see what it was. My g35 is a auto and as for the battery it is new so I have ruled it out as the starting issue problem.

 

is your car a 6 MT?

 

your starting problem could be a camshaft sensor which is a pretty common problem on this car.

 

5 speed auto

 

Well had the chance to go to a shop and have the car scanned for codes have 2 stored both banks running lean. Not sure if that is going to be the problem with the starting but I'm sure a contributing factor. Was hoping to get a code to pinpoint a area but no such luck going to have to work to figure out what it may be

 

As for the cam sensor I was thinking that as well but usually throws a code associated with it if I am not mistaken

 

You are right the cam will throw a code.

However, when mine was going bad, it did not throw a code at first not until the sensor get really bad. At first the car just would die on me and had a hard time starting it again.

 

I haven't had the car die on me yet hopefully not ever I'm thinking I will start with figuring out what is causing the lean condition and go from there. Did you replace both cam sensors when you car also had hard time starting? Or does one fail more then the other kinda seems like a silly question but thought I would ask