Cold start/ hard start problem driving me nuts - Ford Truck Enthusiasts Forums

Go Back  Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel
Reload this Page >

Cold start/ hard start problem driving me nuts

Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by:

Cold start/ hard start problem driving me nuts

 
  #1  
Old 01-19-2019, 12:17 PM
cabloom300's Avatar
cabloom300
cabloom300 is offline
Elder User
Thread Starter
Join Date: Aug 2009
Location: Clearfield County, PA
Posts: 943
cabloom300 is starting off with a positive reputation.
Cold start/ hard start problem driving me nuts

So I've posted about this issue before and made only slight process. Background on the truck. 2000 with 307k. Parts replaces in the last 4ish years approx 25k miles. OEM ICP, IPR, injector o rings, glow plugs uvch, stancor relay and some other things not related to the issue. To my knowledge, stock injectors, and hpop. Before I start, I run 15w-40 oil. I know it may not be the best thing to use in the winter but I've had no issues in the past and has started great in the cold weather. So this year I've had an intermittent signal to the GPR. I have since seem to find the issue and its turning on all the time but having a heck of a time starting. I was going to test the batteries (around 4 year old dekas) but I was just using my brothers 7.3 to helping it turn over a tad quicker. This is what it did this morning. Cranked it twice and and the third time finally started. It almost sounded like gp's but it dont think that could be the problem. I ohmed them at the harness and they were all right around .5 ohms. To me it almost sounds like its hpo related I will get my computer on it to try and read the icp while cranking. It also starts better but cranks longer than it should and doesnt start as rapid as it should either. So its primarily a cold problem but also reflects on the warm starting which again to me shoes that it may be icp related and not glow plugs or injectors. I'm going to try and get the icp while cranking. I know 6.0s have long cranking issues with hpo issues but would the 7.3 hpop go out like this. Where should I go from here? This truck has been great but I can't figure it out and I need this truck from time to time. Thanks!

https://youtu.be/I_a2BVaXkVk
 
  #2  
Old 01-19-2019, 12:20 PM
cabloom300's Avatar
cabloom300
cabloom300 is offline
Elder User
Thread Starter
Join Date: Aug 2009
Location: Clearfield County, PA
Posts: 943
cabloom300 is starting off with a positive reputation.
Another video of it warmed up and starting. To the average person this may not sound but but to me, I know its cranking longer and once started idles slower than it should and then it rebounds

https://youtu.be/fdMyhmIc-M0
 
  #3  
Old 01-19-2019, 03:42 PM
Hussler's Avatar
Hussler
Hussler is online now
Postmaster
Join Date: Sep 2007
Location: Medford Oregon
Posts: 4,070
Hussler is a splendid one to beholdHussler is a splendid one to beholdHussler is a splendid one to beholdHussler is a splendid one to beholdHussler is a splendid one to beholdHussler is a splendid one to beholdHussler is a splendid one to behold
Originally Posted by cabloom300 View Post
Another video of it warmed up and starting. To the average person this may not sound but but to me, I know its cranking longer and once started idles slower than it should and then it rebounds

https://youtu.be/fdMyhmIc-M0
Sounds - looks perfectly normal to me on the warm start video. These are not gas engines,IPR and ICP are just compensation on initial startup to maintain a constant RPM. What is your concern? If your brother had to jump to start in cold then yes the batteries are probably toast or the starter is gone past it's service life, just a guess. Have a link to the cold start issue please post it here.
 
  #4  
Old 01-19-2019, 03:46 PM
beef tits's Avatar
beef tits
beef tits is offline
Elder User
Join Date: Mar 2017
Posts: 542
beef tits is gaining momentum as a positive member of FTE.beef tits is gaining momentum as a positive member of FTE.
If you are on original injectors at 307k, you probably need new ones. I kept looking for reasons not to buy them and replaced everything else on my truck... nothing got it to start in the cold until I did injectors. With 15W40 mine were so bad it wouldn't fire under 40F outside... then it ran like **** until it warmed up a bit. I'd have no throttle response at all on cold starts until it ran a few minutes. This was at 180k miles.

When it does cold-start, do you have throttle response right away?
 
  #5  
Old 01-19-2019, 04:07 PM
Colorado350's Avatar
Colorado350
Colorado350 is offline
Postmaster
Join Date: Nov 2015
Location: Colorado Springs
Posts: 2,948
Colorado350 is a splendid one to beholdColorado350 is a splendid one to beholdColorado350 is a splendid one to beholdColorado350 is a splendid one to beholdColorado350 is a splendid one to beholdColorado350 is a splendid one to beholdColorado350 is a splendid one to beholdColorado350 is a splendid one to behold
Well, the easiest place to start is have your batteries load tested. Then proceed from there. If you have a good charger either charge the batteries on low amp setting over night and/or put the charger on vehicle start (high amp) and see if it starts better.
 
  #6  
Old 01-19-2019, 07:09 PM
cabloom300's Avatar
cabloom300
cabloom300 is offline
Elder User
Thread Starter
Join Date: Aug 2009
Location: Clearfield County, PA
Posts: 943
cabloom300 is starting off with a positive reputation.
The cold start video is posted in my original post. and yes if i give it throttle right away it responds to it. I just have a hard time thinking the all the sudden my injectors are bad. This is the first year ive had any issues what so ever with starting. Also the cold start was the THIRD time cranking before it would start. The only reason we hooked up his truck was to crank it a bit fast being that it wasent plugged in.
 
  #7  
Old 01-19-2019, 10:25 PM
Brandonpdx
Brandonpdx is online now
Senior User
Join Date: Dec 2018
Location: Linden, NJ
Posts: 143
Brandonpdx is starting off with a positive reputation.
At that mileage it really could be multiple issues at the same time. It sounded like it was having a hell of a time building injection pressure and holding it once it finally got going (romping). I think it's 500 psi the PCM needs to see before it will even try to start the engine. You're shooting around in the dark though without any way to monitor the sensors with a laptop. (ForScan) I would be curious was the ICP readings look like under starting and driving conditions and also IPR values. But if you put a new IPR in it somewhat recently it probably isn't that. Sounded like it hot started pretty normally anyway which is usually where you notice long hot starts. Wild a*s guess would be a kaputt HPOP that can't crank that cold 15W40 anymore.
 
  #8  
Old 01-19-2019, 11:38 PM
Colorado Horseman's Avatar
Colorado Horseman
Colorado Horseman is online now
Senior User
Join Date: May 2016
Location: Colorado Front Range
Posts: 212
Colorado Horseman has a good reputation on FTE.Colorado Horseman has a good reputation on FTE.
Typical of worn poppets- plus you undoubtedly took years off the life of your starter by cranking this long.

Get new 850 CCA batteries (both of them). Plug engine heater in for 3-4 hours and try again. Should start fairly quickly even if glow plugs are marginal. Best to OHM glow plugs to check them, but should start even if they are marginal. An injector "Buzz Test" will find worn poppets.

Many "cold start" topics on site - usual fix is batteries, glow plugs and relay, and shimming worn poppets.

Search is your friend!

7.3 Injector Shim Kit
 
  #9  
Old 01-20-2019, 08:49 AM
cabloom300's Avatar
cabloom300
cabloom300 is offline
Elder User
Thread Starter
Join Date: Aug 2009
Location: Clearfield County, PA
Posts: 943
cabloom300 is starting off with a positive reputation.
Originally Posted by Colorado Horseman View Post
Typical of worn poppets- plus you undoubtedly took years off the life of your starter by cranking this long.

Get new 850 CCA batteries (both of them). Plug engine heater in for 3-4 hours and try again. Should start fairly quickly even if glow plugs are marginal. Best to OHM glow plugs to check them, but should start even if they are marginal. An injector "Buzz Test" will find worn poppets.

Many "cold start" topics on site - usual fix is batteries, glow plugs and relay, and shimming worn poppets.

Search is your friend!

7.3 Injector Shim Kit
again, relay is brand new. GPS are 4ish years old OEM. And I also ohmed them yesterday, all were give or take .5 ohms at the harness. I'm going to see what forscan will tell me about icp and try to run a buzz test to. Then I'll try plugging it in and see what it does from there.
 
  #10  
Old 01-20-2019, 08:52 AM
Walleye Hunter
Walleye Hunter is online now
Post Fiend
Join Date: Mar 2014
Location: Douglassville, PA
Posts: 5,680
Walleye Hunter is a splendid one to beholdWalleye Hunter is a splendid one to beholdWalleye Hunter is a splendid one to beholdWalleye Hunter is a splendid one to beholdWalleye Hunter is a splendid one to beholdWalleye Hunter is a splendid one to beholdWalleye Hunter is a splendid one to behold
You say that you're running 15W40 oil. Quite a few have reported a notable improvement by switching to 5W40, your call.
 
  #11  
Old 01-20-2019, 10:12 AM
Brandonpdx
Brandonpdx is online now
Senior User
Join Date: Dec 2018
Location: Linden, NJ
Posts: 143
Brandonpdx is starting off with a positive reputation.
Switching to 5w40 syn oil might help a little and also adding a 4oz bottle of XPD Boost when you fill up helps get it going a little quicker with the bump in cetane. Also give the glow plugs a nice long on-time before even trying it. On a cold morning ill let it sit there for 50-60 seconds but they can stay on for up to 120 depending on the temp. But you'll probably end up having to get your hands dirty at some point to really fix whatever that is. You've either got badly worn injectors or a problem with the high pressure oil system, either one is possible at that mileage.
 
  #12  
Old 01-20-2019, 10:18 AM
beef tits's Avatar
beef tits
beef tits is offline
Elder User
Join Date: Mar 2017
Posts: 542
beef tits is gaining momentum as a positive member of FTE.beef tits is gaining momentum as a positive member of FTE.
Poppet shimming is a temporary fix, if it is indeed the problem, and you want it fixed for good, you need new injectors.
 
  #13  
Old 01-20-2019, 12:26 PM
schlepprock250's Avatar
schlepprock250
schlepprock250 is offline
Guns Dont Kill People..
Join Date: Mar 2008
Location: Archdale,N.C.
Posts: 2,693
schlepprock250 is a splendid one to beholdschlepprock250 is a splendid one to beholdschlepprock250 is a splendid one to beholdschlepprock250 is a splendid one to beholdschlepprock250 is a splendid one to beholdschlepprock250 is a splendid one to behold
After replacing my batteries, battery cables and starter and seeing the difference...your starter is definitely dragging.
 
  #14  
Old 01-20-2019, 01:06 PM
BillyBob69's Avatar
BillyBob69
BillyBob69 is offline
Post Fiend
Join Date: Jul 2003
Location: Peyton, CO
Posts: 7,065
BillyBob69 is a splendid one to beholdBillyBob69 is a splendid one to beholdBillyBob69 is a splendid one to beholdBillyBob69 is a splendid one to beholdBillyBob69 is a splendid one to beholdBillyBob69 is a splendid one to beholdBillyBob69 is a splendid one to behold
Have you checked the oil level in the HPOP when its cold before you try to start it? I haven't seen all injectors go south at the same time so I am with you on that point but the HPOP drive the injectors so if it draining back down then when you are cranking, it is refilling the HPOP and finally getting the injectors to fire.
My E99 has 342k on the clock and all original motor. I just put new GPs in it yesterday and it fired up this morning just fine in 25 weather. I would think if it was a bad injector you would feel like a miss or chugging. But for all to go at the same time...not sure I buy into that.
 
  #15  
Old 01-20-2019, 01:12 PM
beef tits's Avatar
beef tits
beef tits is offline
Elder User
Join Date: Mar 2017
Posts: 542
beef tits is gaining momentum as a positive member of FTE.beef tits is gaining momentum as a positive member of FTE.
Originally Posted by BillyBob69 View Post
I would think if it was a bad injector you would feel like a miss or chugging. But for all to go at the same time...not sure I buy into that.
Old worn injectors are different than "a bad injector", they are hardly noticeable once the truck starts to warm up.

A well-working truck should fire up after one glow plug cycle in single digit weather, even slightly below 0 on 15W40, without being plugged in.
 

Thread Tools
Search this Thread

Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.