Won't Start When Warm - In A Weird Way - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
» Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto EscrowInsurance

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 12-31-2004, 10:28   #1 (permalink)
Registered User
 
Join Date: Dec 2004
Location: Iowa
Age: 52
Posts: 1
Question Won't Start When Warm - In A Weird Way

New to this place, but it looks very well put together, here’s my question:

1994 F150 4X4 4.9l 5speed – engine often doesn’t start after being warmed up, it tries, but almost acts like it’s dieseling, shakes around snorts, and all sorts of bad things, has that same smell too. Cycling the ignition switch 10 times often will allow it to start. This only happens in a window of 10 to 40 minutes after the vehicle has been turned off, I could turn it off and immediately restart it all day long, and, if I let it sit for more than 40 minutes (depending on outside temps) it will always start.

More odd information – I have 2 tanks, almost always run off the front tank first, to near empty, then switch to the rear tank, if I run it to near empty and switch back to the front tank I’ll always have between 1/8 and ¼ tank in the front tank. Fuel flow volume is suspicious, I have good fuel pressure – both tanks, but the truck was checked out and I was told that when running on the front tank volume is inadequate, and he suspected the front fuel pump. I however don’t think changing the front fuel pump is going to take care of my starting problem, because the same problem exists when starting off the rear tank. I spoke with another tech and he is suspicious of the fuel tank selector valve because the front tank is clearly getting fuel from the rear somehow, this valve is apparently a spring return valve so cycling the ignition switch might somehow correct the condition. Another suspicion is vapor lock, if that can even happen in a EFI engine, but what I’m told is earlier models with the same engine and EFI system had a small fan that blew directly on the fuel rail (it does sit right above the exhaust manifold), mine however does not have this fan, not sure when Ford did away with that system.

Any insight would be greatly appreciated.

Chris
chandler0109 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-31-2004, 22:14   #2 (permalink)
Not a Joe Lunchpail
 
Join Date: May 2003
Location: Dorkland, NZ
Posts: 309
Re: Won't Start When Warm - In A Weird Way

Sounds like a leaking injector filling the manifold with fuel & flooding the engine. Next time try starting it with the throttle on the floor.
yeah right is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Expedition won't start Igor Ford Expedition Forum | Lincoln Navigator Forum 4 08-11-2004 16:07
Bypassing smart lock for remote start aphexer Inline 6 Tech 16 07-31-2004 05:33
my 1990 ford probe lx wont start probe90lx V6 and Hot4 Tech 2 05-08-2004 09:30
my 1990 ford probe lx doesnt start probe90lx V6 and Hot4 Tech 1 04-25-2004 15:12
AU hard to start after left for long periods KenOath General Tech 5 04-09-2003 20:19

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 05:09.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.