Trucks still down
Thread Starter
|
Elder User
Joined: Dec 2008
Posts: 657
Likes: 0
From: Ocala
Trucks still down
This is a continuation of my old thread. It has been about three weeks now and I still can not get my truck running. I had checked all the obvious no start issues before posting the first time and I have now put a lot of time/money into it.
I have changed the IPR, CPS, HPOP to a new 17* pump, IDM, and PCM. The truck spins over fast as can be and the tach moves but no smoke comes out of the tailpipe. I put a gauge on the block and I am getting low pressure oil when it cranks but I am not reading ANY high pressure oil off the rails with a mechanical gauge.
The day this happened I woke up and the truck started like normal but then cut off instantly after about 5 seconds of being started. Cranked again and it fired up after a little hesitation. I drove home, about 30 min, and the truck drove fine the whole time. Was at my house for about an hour, went to leave and absolutely nothing. Would just crank over forever.
I do not know what else to look at or change. Any ideas appreciated.
I have changed the IPR, CPS, HPOP to a new 17* pump, IDM, and PCM. The truck spins over fast as can be and the tach moves but no smoke comes out of the tailpipe. I put a gauge on the block and I am getting low pressure oil when it cranks but I am not reading ANY high pressure oil off the rails with a mechanical gauge.
The day this happened I woke up and the truck started like normal but then cut off instantly after about 5 seconds of being started. Cranked again and it fired up after a little hesitation. I drove home, about 30 min, and the truck drove fine the whole time. Was at my house for about an hour, went to leave and absolutely nothing. Would just crank over forever.
I do not know what else to look at or change. Any ideas appreciated.
Thread Starter
|
Elder User
Joined: Dec 2008
Posts: 657
Likes: 0
From: Ocala
Luckily I only had to buy the CPS and HPOP. My buddy has my exact truck that runs great, We put his IDM, PCM, and IPR in my truck and still no start. Put my same parts in his truck and his fired right up.
For the fuel pressure... I have an electric fuel pump on a switch and a gauge under the hood. The guage on my FPR reads 72psi. About two weeks before the no start I turned my pump on but it would not build pressure, the pump was running, I know because it is loud as hell lol but it just would not build pressure. You could hear a loud hiss inside the passenger head, sounded like air. Not sure if this is related though because after about 5 minutes it built up pressure and ran fine until it died two weeks later.
For the fuel pressure... I have an electric fuel pump on a switch and a gauge under the hood. The guage on my FPR reads 72psi. About two weeks before the no start I turned my pump on but it would not build pressure, the pump was running, I know because it is loud as hell lol but it just would not build pressure. You could hear a loud hiss inside the passenger head, sounded like air. Not sure if this is related though because after about 5 minutes it built up pressure and ran fine until it died two weeks later.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Have you had the injectors out lately? If you're reading no high pressure oil, it's time to block off one HPOP line and stick your gauge in the other head and read pressure with each head isolated. (assuming you've already verified the new IPR is working properly).
Thread Starter
|
Elder User
Joined: Dec 2008
Posts: 657
Likes: 0
From: Ocala
Have not pulled the injectors. I put in stage ones about 20k miles ago but I guess the o-rings could be shot. I will try to isolate the heads and see if one has a problem. Thanks! I'll post the results after I do that.
PREMIUM SPONSOR
Joined: Sep 2003
Posts: 2,630
Likes: 217
From: North East Ohio
Hook you HPOP gauge to one line comign from teh HPOP and block off the other port. Crank and see what it reads. If it goes to 3800 psi, then run a line to one head and repeat. Then run that same line (or at least the same port and keep the gauge where it is) to the other head and repeat.
If it's a HPOP issue you will not get 3800 psi (or so) at the pump or one of the heads. That should help narrow it down at least.
If it's a HPOP issue you will not get 3800 psi (or so) at the pump or one of the heads. That should help narrow it down at least.
__________________
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
Thread Starter
|
Elder User
Joined: Dec 2008
Posts: 657
Likes: 0
From: Ocala
Hook you HPOP gauge to one line comign from teh HPOP and block off the other port. Crank and see what it reads. If it goes to 3800 psi, then run a line to one head and repeat. Then run that same line (or at least the same port and keep the gauge where it is) to the other head and repeat.
If it's a HPOP issue you will not get 3800 psi (or so) at the pump or one of the heads. That should help narrow it down at least.
If it's a HPOP issue you will not get 3800 psi (or so) at the pump or one of the heads. That should help narrow it down at least.
Trending Topics
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Fords to Drive Before You Die
Joe Kucinski
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
Hotshot
Joined: Jul 2008
Posts: 11,231
Likes: 130
From: Thomasville, GA
I'm guessing some of the o-rings were starting to come apart when he pulled them, maybe had some knicks in them?
Thread Starter
|
Elder User
Joined: Dec 2008
Posts: 657
Likes: 0
From: Ocala
Yes, it is fixed 
Its nice to drive it again
It was like it was about to come apart, just a little bit holding the o-ring together. Once the injector was out you could pull the o-ring apart.
Its nice to drive it againIt was like it was about to come apart, just a little bit holding the o-ring together. Once the injector was out you could pull the o-ring apart.
Last edited by KevinC.; Sep 13, 2010 at 05:53 AM. Reason: TYPO