I purchased a 2013 chevy 3500, after doing some research I opted to do an injection pump by S&S that required no tuning. In addition, I had an Air Dog lift pump installed. Pulling away from my mechanic, I tried to accelerate but observed that truck loss power around 2000-2500 RPM. In park it will go to about 4000 RPM. Under a load it refuses to do what it should. Mechanic checked lines, tested the fuel went over everything he did. He suggested to tune, so EZ link purchased and tune done and still no luck. Any advice greatly appreciated or if anyone has experienced a similar issue I would like to hear from you, thanks in advance.
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Ron Nielson
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#2 ·
Aug 9, 2022
Your subject was high rail pressure yet nothing in your post suggests that. Why?
Ron Nielson - Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different
2008 Silverado LT, Crew Cab, 2WD,LB
..
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yglesiasemilio
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#3 ·
Aug 10, 2022
Ron Nielson said:
Your subject was high rail pressure yet nothing in your post suggests that. Why?
I posted high rail pressure because that's what the mechanic that did the injection pump said it was reading on the analyzer. To be quite frank when diesel mechanics start talking technical jargon, they might as well speak in Martian. I'm just trying to find out if anyone has had a similar issue and find out how it was remedied.
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MIkey52
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#4 ·
Aug 10, 2022
Never heard of high rail pressure limiting rpm's, but low rail pressure, yes.
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yglesiasemilio
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#5 ·
Aug 10, 2022
Ron Nielson said:
Your subject was high rail pressure yet nothing in your post suggests that. Why?
MIkey52 said:
Never heard of high rail pressure limiting rpm's, but low rail pressure, yes.
I hopefully will have my mechanic on this thread soon. At least he will be able to give a better technical explanation to what is happening, thanks for reply.
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Ron Nielson
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#6 ·
Aug 10, 2022
Attached is the info I have on P0088, high fuel rail pressure. Won't mean much to the OP, but at least it's one specific condition. Also see
P0088 - Chevrolet Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis Your mech could possibly mean that the lift pump pressure is too high for your particular truck and setup. It could mean lots of things.
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Ron Nielson - Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different
2008 Silverado LT, Crew Cab, 2WD,LB
..
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Joseph-Lorefice
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#7 ·
Aug 12, 2022
Hi all I’m the tech that did the work on the vehicle. Prior to installing the cp3 conversion kit the truck was running and driving perfectly. At some point the vehicle had cp4 failure and by the looks of it. The lines injectors pump and rails were replaced. Not the best attention to detail but none the less it ran fine. Fast forward to the fun part. Take the truck on a test drive I never like to beat on them
Out of the box so I didn’t realize any driveability issues. Give the vehicle back makes it down the block the customer said he can’t get over 2,000 rpm. I didn’t believe it because I put five or so moles
On it no issue but again I wasn’t giving it the berries. Hook up my versus scan tool and start watching some
Live data. Frp actual and desired match through out the power and and fuel pressure is constant at 12 to the cp4 with the air dog. Checked all lines and fitting no leaks no air bounds. The truck will cut power at exactly 2250 rpm. Like the traction control comes on. Lose all pedal until you release and ease back into it. No
Metal particals were found in the regulator on the old cp4 pump might I add so fuel contamination is out. The only reason I’m going to a tuning issue is because the pump that was installed was supposedly an emissions compliant pump but yet there was no fuel feed port for the 9th injector so my thought is why can this pump be called no tuning when clearly the 9th injector would have to be removed and turned off to use this pump. Anyway speaking with a few people we got hooked up with great white northern diesel and ccs tuning. A couple
Of cp3 conversion tunes later nothing. Did the second regulator fuel fill test. Held 1500 rpm for 15 seconds had below the amount threshold for fuel bleed off so I’m ruling out a bad regulator. I’m convinced it’s in the tune just truing
To get the right person. I have seen numerous threads on here with people with the same issue just have not seen any resolve.
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#8 ·
Aug 12, 2022
Joseph-Lorefice said:
Hi all I’m the tech that did the work on the vehicle. Prior to installing the cp3 conversion kit the truck was running and driving perfectly. At some point the vehicle had cp4 failure and by the looks of it. The lines injectors pump and rails were replaced. Not the best attention to detail but none the less it ran fine. Fast forward to the fun part. Take the truck on a test drive I never like to beat on them
Out of the box so I didn’t realize any driveability issues. Give the vehicle back makes it down the block the customer said he can’t get over 2,000 rpm. I didn’t believe it because I put five or so moles
On it no issue but again I wasn’t giving it the berries. Hook up my versus scan tool and start watching some
Live data. Frp actual and desired match through out the power and and fuel pressure is constant at 12 to the cp4 with the air dog. Checked all lines and fitting no leaks no air bounds. The truck will cut power at exactly 2250 rpm. Like the traction control comes on. Lose all pedal until you release and ease back into it. No
Metal particals were found in the regulator on the old cp4 pump might I add so fuel contamination is out. The only reason I’m going to a tuning issue is because the pump that was installed was supposedly an emissions compliant pump but yet there was no fuel feed port for the 9th injector so my thought is why can this pump be called no tuning when clearly the 9th injector would have to be removed and turned off to use this pump. Anyway speaking with a few people we got hooked up with great white northern diesel and ccs tuning. A couple
Of cp3 conversion tunes later nothing. Did the second regulator fuel fill test. Held 1500 rpm for 15 seconds had below the amount threshold for fuel bleed off so I’m ruling out a bad regulator. I’m convinced it’s in the tune just truing
To get the right person. I have seen numerous threads on here with people with the same issue just have not seen any resolve.
Click to expand...
Thanks Joe, that was a mouthful! Hoping someone joins the thread with some insight or has run into a similar situation 🙏
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