2000 Suburban 5.3L Hard Start when Hot

Maintenance/Repairs
,
1

My 2000 Suburban with 115,000 miles starts at the first turn on the key when it’s cold.



After driving for a while, shutting it down and letting it sit for 10 minutes it’s hard to start. The engine turns over normally but will not start unless I press the gas peddle a few time. After this it runs a little rough for a few seconds then smooths out.



If after running it I shut down then immediately restart it starts up fine.



No other engine issues once started, it runs normally.



Where to start?



Thanks,

Tom

2

Likely leaking fuel pressure regulator or leaking fuel injectors. They can dump fuel in while the engine is turned off resulting in a flooded condition. Working the gas pedal helps clear the flooding.

3

There are 56 driveability TSB’s for your Suburban,some fit your symptons, give them a look.

4

I pulled the vacuum hose off the Fuel Pressure Regulator and gas leaked out. Is this a sign that it’s failed?

5

Problem solved! Fuel pressure regulator was leaking, when I removed the vacuum hose fuel was dripping out. Replaced part, $45 from Autozone, all is well.

Thanks,
Tom