Do you have a check engine light on?? If so, have the vehicle scanned at autozone for the error code. If it isn't on, this may be caused by faulty crankshaft or camshaft position sensor. Cam sensor controls firing and crank sensor controls fuel. This issue needs to be physically diagnosed!!
I'm pretty sure your car is equipped with a cold-start valve which may be sticky and this could explain the random hard-starting.
This valve serves as a choke did on carburetter-equipped cars and enriches the fuel-air mix with a cold engine.
This might not cause a warning light since it is a temporary condition.
There is no COLD START INJECTOR (NOT VALVE) on these 3.5L motors. These motors are not comparable to carb motors, its an advance set-up. Instead they use individual fuel injectors that fire immediately, NO NEED for a Choke. If a cam or crank sensor is going out, it WILL NOT set off the chk engine light, but will cause hard starts. Leaking fuel injectors may also cause a hard start because they flood cylinders when engine is OFF. Fuel-Air ratio mix is 100% computer controlled by these sensors/components: MAP, Air temp, IAC valve, cam 1
Gary: Please note I neither stated the car had a cold start valve (or injector) nor did I claim it had a choke.
Please read what I wrote, not what you think I wrote.
×
SOURCE: my 2004 nissan maima fails to start on the first
The guy who told you its a possible fuel line issue... could very well be spot on .
Try this...
When you get into the car.. turn the key on... and wait for the fuel pump to stop pumping...(pressurising the system) and then start the car...
Testimonial: "Thank you!"
484 views
Usually answered in minutes!
×