Strange Warm Start Issues stalling Video Included!
03-20-2016, 09:28 AM
#1
Strange Warm Start Issues stalling Video Included!
This problem seems to only happen when I warm start the car after its sat for 10 to 15 minutes. I have replaced the IAC and it's had new gaskets put on its headers. Issue still remains consistent. What's everyone's thoughts on possible solutions.
Coils, plugs, sensors, injectors???? I am kinda at a lose....
Coils, plugs, sensors, injectors???? I am kinda at a lose....
03-21-2016, 09:58 AM
#2
1st Gear Member
Join Date: Feb 2014
Location: FL
Posts: 90
I guess you're not getting any codes?
Start ruling things out:
Hook up a fuel pressure gauge and monitor fuel pressure as it's dying - FP should be steady and not change.
Check the engine for any vacuum leaks (don't forget brake booster).
If you can look at live data - see where your O2 sensors & fuel trims are.
The results of the tests might give you a direction to follow.
Start ruling things out:
Hook up a fuel pressure gauge and monitor fuel pressure as it's dying - FP should be steady and not change.
Check the engine for any vacuum leaks (don't forget brake booster).
If you can look at live data - see where your O2 sensors & fuel trims are.
The results of the tests might give you a direction to follow.
03-21-2016, 01:44 PM
#5
Yes, it smooths back out and runs just fine after its done stalling. Now and then if I have to stop suddenly it will dip to 600 to 500rpm but only for a second and it is fine. Nothing like what I does after letting it sit for 15 minutes. Ford just said oh its because your header is loose and they just put a new gasket on it.... I highly doubt they took the time to let the car warm all the way up, then let it sit for 15 to 20 minutes then start it......
03-21-2016, 03:14 PM
#6
3rd Gear Member
Join Date: Apr 2011
Location: Wisconsin
Posts: 917
If Ford replaced a leaked header gasket, that is money well spent, even if it did not fix your problem. If you have time you might take it to Autozone and have them read the computer to see if it has a stored error code that it is not displaying. The fact that it smooths out eliminates the coils and plug wires, so it sounds like a fuel issue, which should give you a code. Does the exhaust smell like gas when you start it warm?
I guess I wouldn't rule this out, but I would think you'd have the same problem when cold. Have you removed the plugs to see what they look like? If one injector is leaking, that plug might be darker than the others. I'd kinda look for something that is telling it that is cold, and it's starting up rich. Replacing the IAC seems like you might be on the right track.
I was thinking leaky injectors thus flooding when it sits for a little while?
03-21-2016, 03:31 PM
#7
If Ford replaced a leaked header gasket, that is money well spent, even if it did not fix your problem. If you have time you might take it to Autozone and have them read the computer to see if it has a stored error code that it is not displaying. The fact that it smooths out eliminates the coils and plug wires, so it sounds like a fuel issue, which should give you a code. Does the exhaust smell like gas when you start it warm? I guess I wouldn't rule this out, but I would think you'd have the same problem when cold. Have you removed the plugs to see what they look like? If one injector is leaking, that plug might be darker than the others. I'd kinda look for something that is telling it that is cold, and it's starting up rich. Replacing the IAC seems like you might be on the right track.
03-21-2016, 03:47 PM
#8
3rd Gear Member
Join Date: Apr 2011
Location: Wisconsin
Posts: 917
It's pretty rare that a fuel pump or filter could cause your engine to run rich, it is possible that it could be lean-not getting enough gas, but it would probably stall when you rev it, and run OK at idle when it doesn't need much gas. I'd still try to get some codes off the OBD port if you can.
03-21-2016, 04:06 PM
#9
It's pretty rare that a fuel pump or filter could cause your engine to run rich, it is possible that it could be lean-not getting enough gas, but it would probably stall when you rev it, and run OK at idle when it doesn't need much gas. I'd still try to get some codes off the OBD port if you can.
03-21-2016, 07:21 PM
#10
3rd Gear Member
Join Date: May 2015
Location: Ohio
Posts: 578
I would tr throwing some fuel system cleaner in there and see if that doesn't help while you are searching elsewhere. That might clean up those injectors and may take care of your problem. It's a cheap try and won't hurt anything.
