warm starting problem
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
You could, The rail plug is about half way back on the head toward the inside. Make sure everything you use to do it is capable of withstanding 4500psi and is oil rated. That would not be a good line to burst while driving.
Thread Starter
|
New User
Joined: May 2007
Posts: 13
Likes: 0
thanks for the help Alan and Ray. I will have my mechanic instal a gauge. Ray if I fix the low MPG I will let you know what worked. Alan if oil psi is low on a no start what do you think the problem would be. thanks
Last edited by roderick perkins; Jun 2, 2007 at 09:48 PM.
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
If the ICP sensor reading does not match the gauge the it could be a biased ICP sensor (the sensor is reporting over 500psi but the gauge is reading less than 500psi).
It will be hard to diagnose until you can catch her in a no start scenario and read several PID's to see where the problem is coming from.
Some PID's to look at: ICP, IPR Duty Cycle, Fuel pulse width, engine oil temp, RPM, MAP
An outside chance could be the LPOP not being able to supply the HPOP with enough oil during warm cranking or the Anti drainback valve could be jammed open a little allowing oil to drain back and the HPOP have a hard time building pressure (Check the second sentence below).
It will be hard to diagnose until you can catch her in a no start scenario and read several PID's to see where the problem is coming from.
Some PID's to look at: ICP, IPR Duty Cycle, Fuel pulse width, engine oil temp, RPM, MAP
An outside chance could be the LPOP not being able to supply the HPOP with enough oil during warm cranking or the Anti drainback valve could be jammed open a little allowing oil to drain back and the HPOP have a hard time building pressure (Check the second sentence below).
Originally Posted by Service Manual
During initial start or cold start, the high-pressure oil pump (6600) receives unfiltered oil from the left side valve lifter oil gallery through the anti-drain back check ball valve. Once the engine starts or during warm engine starts, the check ball closes and the high-pressure oil pump receives filtered oil from the high-pressure oil pump reservoir. The high-pressure oil pump pumps the oil under extremely high pressures (4,115-20,577 kPa [600-3,000 psi]) through the left and right side high-pressure supply hoses to the high-pressure oil rails (integral to the cylinder heads). Once in the oil rail, the oil is fed to the fuel injector bores through four oil feed galleries drilled and machined in the cylinder head. The high-pressure oil then actuates the fuel injectors.
Senior User
Joined: Nov 2006
Posts: 394
Likes: 0
my truck had the same exact prob with the no start...it wouldnt start when hot but would start just fine when cold...make sure when cranking that you are showing rpm on the tach...i wasnt and it ended up being my CPS...just my .02$
Thread Starter
|
New User
Joined: May 2007
Posts: 13
Likes: 0
my excurision is an 02 so no tack at crank does not apply "thanks Alan" I think I will re-flash the computer to rule it out of the equation. I need to check the anti-drain back check ball valve. do you have a sugestion. also I have a new grey CPS with no change to warm start problem. I ordered a new IPR to ruel it out also.
Last edited by roderick perkins; Jun 4, 2007 at 12:10 AM.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread Starter
|
New User
Joined: May 2007
Posts: 13
Likes: 0
update to no start when warm. Last night I had another no start this time moter had sat 4 hours since last time we used it. during no start I checked the HPOP oil resivour and it was full I think this would rule out the anti-drain back check ball valve.
Junior User
Joined: Feb 2005
Posts: 50
Likes: 1
From: North Carolina
I'm keeping a close eye on this thread as I'm having a similar problem. My 02, 7.3 PSD will finally start after letting it sit for a minute or so between cranking. Today, it took about 6 times, but it finally fired off. This is happening after I cut the engine off for only a few minutes and randomly about twice a month.
Senior User
Joined: Apr 2001
Posts: 114
Likes: 0
From: East Tennessee
If you install a guage, you may want to take it back out after you find the problem. I did not, and about a year and a half later I was on the side of the road with a trail of oil behind me that went forever. It is amazing how much oil these things hold. When the guage blew its internal seal the HPOP just pump the oil out and on the ground. I think it was about a mile long trail behind me. Luckily it shut down before the bearings were starved.
Craig
Craig
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
I know this might sound like it is out there but you might want to put a fuel pressure gauge on that thing just to rule that out. You may have an intermittant fuel supply problem. No fuel pressure = no start. Make sure the filter is good too.