Hughespj47
HughesPJ47
- Thread starter
- #1
I just thought I'd thrown my experience out there and see if anyone is experiencing the same issue. A little background- I live at high altitude and a cold climate. I took delivery on my Track Pack 350 in Mid-Feb, and we happened to have some snow-free roads and warm days (40+F). My GT350 is parked outside so it sees cold temps at night.
After 3 or 4 drives it would start right up and after about 5 seconds, start to die and backfire through the intake. I took it to the dealer and they thought it might be loss of fuel pressure overnight. They did a fuel injector leak down test and all was good. Logic indicated the the fuel pump check valve was probably bad so it was replaced. They started it up the next morning and it still backfired. So, they unplugged the MAF and it started much better. They then replaced the MAF and all seemed fine.
The second cold start after I got it back, I thought I heard an intake backfire. It started me thinking. I had been pretty much sitting down and then pressing the clutch and start buttons simultaneously. So lately, I've been pushing the clutch and waiting a few seconds before pressing the start button. I could swear that I hear a few clicks/ticks from the back that slow down over those few seconds. Then the engine starts normally.
CAN ANYONE VERIFY HEARING THE FUEL PUMP PRESSURIZING THE SYSTEM FOR A FEW SECONDS BEFORE COLD STARTUP? I'd be curious to know. Of course, if you've experienced the intake backfire problem, I like to hear about that, too.
Thanks EVERYONE for posting your thoughts and experiences in the Shelby forum! This has been a treasure trove of information for me!
After 3 or 4 drives it would start right up and after about 5 seconds, start to die and backfire through the intake. I took it to the dealer and they thought it might be loss of fuel pressure overnight. They did a fuel injector leak down test and all was good. Logic indicated the the fuel pump check valve was probably bad so it was replaced. They started it up the next morning and it still backfired. So, they unplugged the MAF and it started much better. They then replaced the MAF and all seemed fine.
The second cold start after I got it back, I thought I heard an intake backfire. It started me thinking. I had been pretty much sitting down and then pressing the clutch and start buttons simultaneously. So lately, I've been pushing the clutch and waiting a few seconds before pressing the start button. I could swear that I hear a few clicks/ticks from the back that slow down over those few seconds. Then the engine starts normally.
CAN ANYONE VERIFY HEARING THE FUEL PUMP PRESSURIZING THE SYSTEM FOR A FEW SECONDS BEFORE COLD STARTUP? I'd be curious to know. Of course, if you've experienced the intake backfire problem, I like to hear about that, too.
Thanks EVERYONE for posting your thoughts and experiences in the Shelby forum! This has been a treasure trove of information for me!
Sponsored