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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4400
Experience:  Owner at DJ Wilson
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I inframe rebuilt a Mack CH613 with motor E7 427.. EGT on

Customer Question

i inframe rebuilt a Mack CH613 with motor E7 427.. EGT on gauge climb way high in to the red.. it was time for an inframe so went ahead and did it. got heads rebuilt at reputable machine shop. all new head gasket kit set, including exh and intake manifold gaskets. turbo had alot of play in shaft so also had turbo rebuilt.. all intake hoses replaced, all clampson and around air cooler torqued. but my Exhaust gas temps are still climbing like before all the work i did. what could it be.
Submitted: 5 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 5 months ago.

Hi my name is***** will be glad to help. First confirm those temps are accurate by checking the actual temps with a digital temp reader at the manifold. You can get the temp reader at most hardware stores. If the pyro is in fact reading correctly, check for leaks or restrictions in your charge air cooler and intake piping. If okay also check the temps between cylinders for a hot or cold cylinder out of line with the rest indicating a potential injector problem. If all reads normal you could have a faulty sensor, harness, or gauge. Let me know

Customer: replied 5 months ago.
Can engine timing sensor code (abnormal frequency, pulse width, or period) mid 128, sid 22, fmi 8...cause exhaust template to climb up a hill and or under load??
Expert:  Daniel Wilson replied 5 months ago.

Hi,

MID 128 SID 22 FMI 8

Abnormal frequency or pulse width or period

Erratic

or

intermittent

signal

from

CKP

sensor

Open in the CKP sensor

MIL

illuminated

Yellow Check lamp

illuminated

Possible

loss

of

engine

power

Increased

engine

start

time

Increased

fuel

consumption

Uneven

cylinder

balancing

Power

loss

Smoke

Faulty CKP sensor

harness

Faulty CKP sensor mounting

Expert:  Daniel Wilson replied 5 months ago.

Yes it is possible as you can see below it creates a cylinder imbalance ans the other symptoms posted. Are you experiencing those symptoms?

Customer: replied 5 months ago.
I guess you can say maybe a slight imbalance. No smoking or anything. Found the wiring ripped off. Spliced it back up and code went inactive.. going to drive truck like this today. I overnighted a CAC tester. So sometime tomorrow I will take loose hose off turbo and pressure it up.... also temps at manifold were all 10 degrees +/- from each other
Expert:  Daniel Wilson replied 5 months ago.

thanks for the update. Let me know how it does the rest of the day.

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