will not start on first crank
Thread Starter
Pole Position
Joined: Sep 2010
Posts: 2,086
Likes: 242
will not start on first crank
06 ls430 some times in the morning the car will not start on the first try,strong crank however wont start.always starts on the second crank and doest have a problem the rest of the day.any thoughs you guys and girls may have on what may be going on?thanks jim
Driver
Joined: Feb 2008
Posts: 105
Likes: 1
From: South Carolina
Fuel system is not holding pressure over night in all likelyhood. There should be a check valve in-line to maintain fuel pressure. It may be going bad. Try turning your key to the "Run" position to activate the fuel pump and pressurize for a few seconds before turning it to start the car.
CL Community Team
Joined: Sep 2009
Posts: 3,915
Likes: 227
From: Alabama
Fuel system is not holding pressure over night in all likelyhood. There should be a check valve in-line to maintain fuel pressure. It may be going bad. Try turning your key to the "Run" position to activate the fuel pump and pressurize for a few seconds before turning it to start the car.
If the line has depressurized overnight then there may not be enough fuel pressure at the injectors to start the motor on the first start.
Per the suggested experiment, move the key to run position for 5-10 secs first before moving it forward to engage the starter for that "first start" and if that fixes the non starting problem then its likely a fuel pump relay, fuel pump check valve, or fuel line related issue. Sounds like the check valve would be a good starting point for diagnoses.
Lead Lap
Joined: Jan 2005
Posts: 454
Likes: 8
From: KS/MO
My 2004 is sometimes a little finicky to start on the first crank of the day, but I've never had it NOT start completely. It is not the recall issue because my fuel pump was already replaced, and your car I believe, is beyond the recall anyway. Check valve sounds like a likely candidate to me.
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