HEUI Question
Thread Starter
|
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
HEUI Question
I've recently had two hot no starts with my truck about two months àpart and im going to be doing some AE tests soon. Im running dual iprs and im wondering when you unplug them do they default open or closed so I can check duty cycle and icp with them isolated. I didn't get much of a response in the sd section
Here's my thread has a little more info. I may even be wrong in thinking its hpop related. I still have the garbage grey cps so maybe its just a coincidence. Also I used to be able to peg my 35psi boost guage now im lucky to get 30. Im thinking the low boost, fuel mileage and smoke and no start are related but I could be wrong.
https://www.ford-trucks.com/forums/1...tem-gurus.html
Here's my thread has a little more info. I may even be wrong in thinking its hpop related. I still have the garbage grey cps so maybe its just a coincidence. Also I used to be able to peg my 35psi boost guage now im lucky to get 30. Im thinking the low boost, fuel mileage and smoke and no start are related but I could be wrong.
https://www.ford-trucks.com/forums/1...tem-gurus.html
Thread Starter
|
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
Nope only one has to go out for it to not work. Pressure is equalized before going to the heads so if one ipr stuck open or an oring went out it would bleed off pressure off the whole system. Im going to change the cps anyway but with all the other issues im not sure that's it. Just haven't had time to do it lately. Its pretty tight in the valley with both pumps so just trying to learn as much as I can before I dig into it
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
When you unplug the IPR, it should open all the way thus not allowing the HPOS to build pressure and the engine will die. So, since you have dual IPRs and it equalizes before going to the heads, the engine should shut down if you unplug one IPR..
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
When the next hot no start occurs , you will have to isolate each of the pumps (deadheading) with a gauge ,to figure out which one is the culprit...Might be difficult ( depending on how you have them set up) if they are inline ...
Thread Starter
|
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
Thanks Travis and Rick. That's what I figured but I was hoping it'd be as simple as unplugging one and doing AE tests but things are never that simple for me lol. Yep they're inline. So hopefully the next no start happens in my driveway. Am I on the right track thinking all my probbems are oil related? So as duty cycle increases the pcm sends more voltage to the ipr causing it to close further? There must be springs in it pushing the plunger open right?
Posting Guru
Joined: Aug 2007
Posts: 1,601
Likes: 0
From: Cato Arkansas
Trending Topics
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
Right, as the need for more HPO rises, the PCM sends more voltage to the IPR solenoid, which pulls the IPR closed little by little. There are springs, needles, all sorts of crap in the IPR. LOL I think I'd concider trying out a remote IPR block so that you only have one IPR to worry about and if things like this happen, it's a bit easier to diagnose...
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
|
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
Yes if in fact it is ipr orings hot oil is thinner and leaks past them losing oil pressure. If you wait the oil cools down causing it to become thicker and the orings seal enough to build enough pressure while cranking
Thread Starter
|
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
I will do a remote ipr if I have to end up taking them out. We did them 7 years ago I was 16 and all I remember is we were up until 5am doing that diy kit so im hoping I don't have to take them out. I can get to the ipr toward the firewall but you can't even see the one toward the front.
Hotshot
Joined: Oct 2003
Posts: 17,791
Likes: 98
From: Ashland City, TN
I remembered right after I posted that you had the Stealth DIY kit.
The Dual IPR argument is funny if you find any threads where guys saying duals are better than singles.
Sounds like a nightmare of problems to me. If one goes bad, you gotta figure out which one it is, and yada yada.
I've never seen the stealth kit, only joeys.
I know joeys is super easy to remove.
The Dual IPR argument is funny if you find any threads where guys saying duals are better than singles.
Sounds like a nightmare of problems to me. If one goes bad, you gotta figure out which one it is, and yada yada.
I've never seen the stealth kit, only joeys.
I know joeys is super easy to remove.
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
I remembered right after I posted that you had the Stealth DIY kit.
The Dual IPR argument is funny if you find any threads where guys saying duals are better than singles.
Sounds like a nightmare of problems to me. If one goes bad, you gotta figure out which one it is, and yada yada.
I've never seen the stealth kit, only joeys.
I know joeys is super easy to remove.
The Dual IPR argument is funny if you find any threads where guys saying duals are better than singles.
Sounds like a nightmare of problems to me. If one goes bad, you gotta figure out which one it is, and yada yada.
I've never seen the stealth kit, only joeys.
I know joeys is super easy to remove.
Thread Starter
|
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
Ok more problems today. Came out of tsc wouldn't start. Waited 10 minutes started right up. Came out of the parking lot throttle wouldn't work just coasted and died. Changed cps no start. Pulled hpop plug it was low took about 16 oz to fill it up fired right up. Made it 15 minutes down the road running perfectly then all the sudden cruising about 45mph rpm wouldn't go above 2k slowly coasted and died. I get tach movement while cranking. No cel. Pulled chip no change. Took hpop plug out and it was down a little but not enough to cause a no start I don't think. Filled it up anyway still no start. Any thoughts?