I have a ht570. It cranks good in the morning and after it gets warm it’s hard to start. I have teed into the oil line

Expert's Assistant chatimg
Customer: I have a ht570. It cranks good in the morning and after it gets warm it’s hard to start. I have teed into the oil line coming from the pump and I can crank on it for about 10-15 seconds and not build over 400 psi. I have changed the injector adapter tube o-rings and I am having the same problems. What am I missing or need to check?
Answered by Andy in 5 hours 4 years ago
17+ years of experience

5,866 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs

Hi there . My name is ***** ***** Have you checked the IPR valve connector for damage ? Also , have you pull the ipr valve out and check the screen on the end of it for signs of damage ?

the screen was damaged and I replaced the ipr valve. No change in starting routine

Ok ... thanks for the info . What year and model of truck is this in ?

2006 international 7500. Last 8 of vin 6j244474

Ok thanks for the info . Can you tell me which faults are in memory after clearing the faults and duplicating the problem ? Here is the procedure :



These are spn numbers ... I also need the FMI numbers please

164 is for injection control pressure . Without the FMI number , I cannot tell you more .

Engine cranks good when cold and has a hard time starting when hot. I checked the hpop and pressurized to 5000psi. There is a lot of oil coming out around the top of two injectors.Pid 171
Fmi 3Pid 164
Fmi3 also just came up on 164

Thanks for the info . 164-3 and 164-4 are related to the ICP sensor . I recommend replacing the sensor and reseal the high pressure oil rail . If the valve cover pass through harness looks ok , it can be re-used . Also check the connection at the pass through for the icp sensor . It is the three wire connector between the number 5 and 6 injectors . Make sure it is in good condition as well .

Checking on 171-3 now

Ok. I already resealed the injector adapters I know there are two more o rings in the puck itself. Should I replace those? What are the chances of having an injector cracked at the top?

171-3 is a sensor or circuit fault for the inlet air temperature sensor . This sensor is mounted on the air filter housing . It is a 2 wire sensor . I would check the connection to this sensor . If connection and wiring looks fine , then I would replace sensor .


They are supposed to leak a little at each injector . This is normal as it is bleeding off excess at the injector port .

If they are leaking huge at 2 injectors , then I would remove and inspect the top of the injectors at the ports . Blow them clean and inspect for excessive grooving going on in the port where the seal would sit . If heavily grooved out , you may need to replace those injectors. Compare all ports on all six injectors

Ok. Give me some time and I will get back with you

Please take the time to rate my service to you so that the site rewards me for my efforts in helping you . Otherwise , I receive nothing for my efforts . Thank you

I will be in an out today but will check in from time to time .


Thank you

It ended up being an injector bypassing in to the oil return

You are quite welcome sir . Please take the time to add me to your list of favorite experts should you need me again . Thank you .

Read less
5,866 satisfied customers
17+ years of experience
17+ years of experience

5,866 satisfied customers



Licensed mechanics

31,131 satisfied customers

Pearl avatar
Steve Pearl, Mechanic's Assistant
14 Mechanics are online right now.
Related Car Questions
2004 freightliner m2 with a cat c7. Would bad injector o
Gary A.
Car Specialist
10 Satisfied Customers
Let me start off by saying My 2016 international with a
Alex Olsen
Car Specialist
808 Satisfied Customers
2002 Freightliner FL70 C7 3126 Cat Motor. First, over a year
Daniel Wilson
Car Specialist
6,648 Satisfied Customers
Brent here, talked about my 450 6.0 on the phone a few times
Chris (aka-Moose)
791 Satisfied Customers
I have a 2009 cascadia dd 15. And I Lost oil pressure
JustAnswer Author
Car Specialist
5 Satisfied Customers
How it works
logoAsk for help, 24/7
Ask for help, 24/7
Members enjoy round-the-clock access to 12,000+ verified Experts, including doctors, lawyers, tech support, mechanics, vets, home repair pros, more.
logoExpert will respond in minutes
Expert will respond in minutes
After you reach out, we match you with an Expert who specializes in your situation. Talk, text, chat, whichever you prefer.
logoSave time & money
Save time & money
No scheduling hassles, missing time from work, or expensive consults.
A JustAnswer membership can save you significant time and money each month.
Sarahesq and 87 other Automotive Mechanics are ready to help you.
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.
Last Updated: 12-20-22
Why you’ll love JustAnswer
JustAnswer is the best way to get expertise on-demand from doctors, lawyers, vets, mechanics and more. Since 2003, we’ve helped more than 9 million people in 196 countries and have an A+ rating with BBB and a 9.6/10 rating with TrustPilot.
Highly rated, verified Experts
We pride ourselves in our 8-step verification process including license and credential checks. Vetted by us and rated by customers, like you.
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
Web sites like justanswer.com/legal ...leave nothing to chance.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

JustAnswerHomeAboutCareersPressPartner ProgramBlogCountries
MembersHow it worksLoginRegisterCategories
ExpertsMeet the ExpertsExpert qualityBecome an Expert
SupportHelp CenterContact Us

© 2003-2023 JustAnswer LLC. All rights reserved.

Privacy PolicyTerms of servicesContact usSitemap
DMCA.com Protection Status