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I have changed the injectors and have another question as to

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HI again. I have changed...
HI again. I have changed the injectors and have another question as to a uneven idle right now...should we start a new thread..or..how does that work. Also have a brake and ABS lights on with a chime now..brakes operate normally, there's enough fluid...? Thanks
Submitted: 6 months ago.Category: Medium and Heavy Trucks
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5/11/2017
Technician: Cat Man, Cat Engine Expert replied 6 months ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 9,008
Experience: I am ASE Master Truck Certified.
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Thanks for asking your question. I will try and help you out. What's your question about idle?
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Customer reply replied 6 months ago
we changed the injectors, on Tue night. The idle after he put the injectors in was kind of rough..meaning the RPM were slightly increasing up and then going down in a quick succession..almost quite rhytmic....since driving it for a couple of hours..that same thing w the idle is only coming on intermittently...as soon as I rev the engine up, even a little bit - it goes away..engine works/sound fine. What does come to mind?
Technician: Cat Man, Cat Engine Expert replied 6 months ago
I see. Thanks for the information. Were the injector trim files installed in the ecm?
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Customer reply replied 6 months ago
I don't think so...If i understand correctly, there's a file that has to be put in the ECM, so it accomodates the new working cylcle/w new injectiors..is this correct? I bought the injectors from Florida Injectors...I think their name was..
Technician: Cat Man, Cat Engine Expert replied 6 months ago
that's correct. If the trim files are not installed. It can cause the engine to do this.
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Customer reply replied 6 months ago
just spoke w the injector guys..since they are aftermarket they say no trim file for these. We'll see if the engine will learn after a few cycles. I have a brake and abs light on..can you answer on those pls?
Technician: Cat Man, Cat Engine Expert replied 6 months ago
I see. Let me know how it goes. Sorry. I am not fimiliar with abs issues. Sorry.
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Customer reply replied 6 months ago
ok. thanks
Technician: Cat Man, Cat Engine Expert replied 6 months ago
You are very welcome my friend. I am happy I could help.
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Customer reply replied 6 months ago
Hi again,
I don't like how the engine is running still...still have the hiccup when idling, but also seeing that going even up a small up-hill, I have to really press on the pedal and i can feel shaking in the cab...not having enough power...wandering if I have the HEUI going out..any idea?
Technician: Cat Man, Cat Engine Expert replied 6 months ago
I see. Yeah normally when the heui is faulty you will have a check engine light on and diagnostic codes.
Also I have not used aftermarket injectors without trim codes. I'm not sure about those. I just know when trim codes are not programmed. The engine can run like this.
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Customer reply replied 6 months ago
no check engine light on..or Drate light coming on..I had them both few years ago when I changed the HEUI pump. How can I check if the Check engine light system/ECM thing is working correctly..in case there might be problems and the computer is not registering and showing up the Check engine light on?
Technician: Cat Man, Cat Engine Expert replied 6 months ago
The yellow check engine light should come on when the key is turned to the on position
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Technician: Cat Man, Cat Engine Expert replied 6 months ago
Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.
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