ISX engine surging
07-12-2016, (Subject: ISX engine surging ) 
Post: #1
ISX engine surging
I have a 09' 386 Peterbilt, 485 ISX, 520k miles. About 6 months ago the mandate was removed ( a member on the forum programmed it and I did the mechanical part) and it has been running GREAT.
Today I first noticed that under acceleration it would rev freely up to 1500rpm.....then it was like a governor kicked in.....would only slowly gain speed. Gauges looked good, but the check engine light was on. It then started surging while I was holding the throttle still. The longer I drove, the less power I had.
I limped it back to my shop and will tackle it in the morning.
I finally have insite, but this will be the first time of me using by myself. What tests should I run? What else should I look for?
replyreply
07-12-2016, (Subject: ISX engine surging ) 
Post: #2
RE: ISX engine surging
Where did you fuel last time ? Do you have see true filter ? If you have one , where's the level ? When did you last change your fuel filters ? Let's start with the simple things . Then check your fuel pressure. See what codes you have . It's properly programmed . It shouldn't switch in different mode itself .
To me sounds like fuel starvation. Any smoke?
replyreply
07-13-2016, (Subject: ISX engine surging ) 
Post: #3
RE: ISX engine surging
Agree with wiseman. Change fuel filters first. Bet you have a fuel pressure code.
replyreply
07-13-2016, (Subject: ISX engine surging ) 
Post: #4
RE: ISX engine surging
(07-12-2016 )Wiseman Wrote:  Where did you fuel last time ? Do you have see true filter ? If you have one , where's the level ? When did you last change your fuel filters ? Let's start with the simple things . Then check your fuel pressure. See what codes you have . It's properly programmed . It shouldn't switch in different mode itself .
To me sounds like fuel starvation. Any smoke?

I only have the factory filters....no see thru.
The filters have about 10k miles on them. I agree with you on starting with the simple things.
No smoke .......... it did a lot before the mandate was removed.
replyreply
07-13-2016, (Subject: ISX engine surging ) 
Post: #5
RE: ISX engine surging
Wiseman and Nilao you guys were right........ new fuel filters took care of my problem.
I have never had them slowly deteriorate like that. Usually you are running just fine and then it is like someone shut the fuel off. Thanks for the help!
replyreply
07-13-2016, (Subject: ISX engine surging ) 
Post: #6
RE: ISX engine surging
Glad to hear that .
Check for algae in your thanks. Damn biodiesel.....
replyreply
07-15-2016, (Subject: ISX engine surging ) 
Post: #7
RE: ISX engine surging
(07-13-2016 )Wiseman Wrote:  Glad to hear that .
Check for algae in your thanks. Damn biodiesel.....
Yes algae is horrible thing. My filters were clogging like every 6000miles and were black. I put some additive and next oil change black chunks fell from my fuel filter housing. Took about a month to clean everything out.
./uploads/201607/post_608_1468593753_e92fa4ba7d30f3971e5199cb10322118.jpg
$30 paid at local marine store.


User's Signature: Cascadia ISX15 CM2350
replyreply
07-20-2016, (Subject: ISX engine surging ) 
Post: #8
RE: ISX engine surging
im having somewhat same issue as other driver but mine is a 2012 and I changed both filters and when im loaded and put my foot into it to clime hill manifold press hits 32 engine light comes on and I lose power till pressure drops down code 0559 fuel rail pressure ? any one help I haven't been able to fix yet
replyreply
07-20-2016, (Subject: ISX engine surging ) 
Post: #9
RE: ISX engine surging
(07-20-2016 )fish hooks Wrote:  im having somewhat same issue as other driver but mine is a 2012 and I changed both filters and when im loaded and put my foot into it to clime hill manifold press hits 32 engine light comes on and I lose power till pressure drops down code 0559 fuel rail pressure ? any one help I haven't been able to fix yet

Trash in the fuel lines or clogging filters?

Bad regulator or bypass valve?

Bad pump?


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
replyreply




NOTE: Rawze.com is not affiliated, nor endorses any of the google ads that are displayed on this website.