hard start when hot
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Pumping the gas pedal during cranking can flood the engine. Keep your foot off the accelerator when starting. Measure the fuel pressure, engine hot, and see if the pressure holds up for a long time after the ign is off. If it falls rapidly, you have a leaky injector/s, or a bad check valve in the fuel pressure regulator. Also, pull a plug wire and bring a grounded wire close to the plug wire while someone cranks the engine. You should see at least a 1/2" snappy spark. If you have a weak spark, you likely have a spark control module at the end of its life.
Safety Car
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
It seems that with today’s fuels which cause injector failure most hard start when hot conditions are do to the injectors going bad, you need to check the resistance with a ohm meter both hot & cold . Next time don’t pump the pedal just hold it steady ¾ open, start car see if that helps I believe that will help clear a flooded condition. I’m sure others will give advice on this also.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Holding the accelerator all the way down shuts off the injectors so that you can clear the engine during cranking. DO NOT hold the accelerator at 3/4 throttle!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Safety Car
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
I didn't remember if was all or part open I have no starting issues with my car thanks. But the OP should not be pumping it at all
Last edited by floridamale; May 10, 2009 at 07:51 PM.
Race Director
Joined: Sep 2005
Posts: 10,878
Likes: 1
St. Jude Donor '07
I had this, too. It went away when i replaced the MAF connector and added another ground to that circuit AND another ground from the battery's frame connection directly to the engine block. And I mean this makes my beast start like she's ice cold overnite!
I was fixing an intermittent MAF code. Might help you?
I was fixing an intermittent MAF code. Might help you?
