- Cat C7 Iap Valve Location Chart
- Cat C7 Iap Valve Locations
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The IAP Control Valve is an electrically controlled. Pilot operated pressure control valve. The Injection Solenoid (11) Actuation Pressure Control Valve is used in. Valve breakage is a very common problem on the C7 and its forerunner the 3126B. However the mileage is usually in excess of 200,000. I have know several that have had the same problem. Almost always the very last valve on the number 6 cylinder. Glad you had warranty because CAT won't help.
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| Author | Topic | Thomas guy
Senior Member
USA
165 Posts | | Posted - 07/10/2005 : 12:32:36 AM | | Hey I was just wondering for those of you that have buses in your fleet with the C7 engine how they are working for you. Ours kind of suck. I mean I know their supposed to be basically a 3126 with a bunch of modifications but they are really dissapointing with all of the leaking etc etc. |
| wagonmaster
Top Member
USA
2298 Posts | | Posted - 07/10/2005 : 05:07:11 AM | Welcome to the club.
Joe | Joe
Land of the Free, because of the Brave! |
| CPCSC_TD
Top Member
USA
657 Posts | | Posted - 07/10/2005 : 09:44:48 AM | The ones we received the last two- years have been very reliable.
The Cummins ISB and 5.9 we have are a different story. They define warranty. |
| Thomas guy
Senior Member
USA
165 Posts | | Posted - 07/10/2005 : 9:59:28 PM | | Yeah Cummins engines are job security for mechanics, ours have nothing but problems. | | Durham School Services delivering your students to school safe, on time and ready to learn... every day. |
| Mechan1c
Top Member
USA
841 Posts | | Posted - 07/11/2005 : 06:20:08 AM | Aside from some leaking IAPV sensors and the 3126's OE crimped HEUI line (use the metal replacement #240-0717), the electronic 6's have been pretty decent. We've had a couple derate due to the IAP valve being erratic (code 164-2) and that's pretty much been it. We have a 98% CAT fleet and jump on problems as soon as they occur. I've had 2 ISB's here in big Thomas WestCoastER's, and other than 1 fuel pump (warranty covered)they were just fine also. Maybe you need to spec a different oil, or take a look at the interval and/or condition.
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| ModMech
Top Member
USA
948 Posts | | Posted - 07/11/2005 : 5:23:04 PM | | We see quite a few of the very newest C7/9s, and really do not have too much bad to say about them other than it would be nice if GM didn't hide the damed thing UNDER the cab. | | If you want customer service, you NEED an International! |
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TroubleshootingSection
Note:PersonalityModuleswith a manufactureddate
beforeJUNE 99 require an electricalconnector
fortheinjectionactuationpressuresensor to be
disconnected in orderforthe'InjectionActuation
PressureControlValveDriverSpecialTest' to turn
offthedriverfortheinjectionactuationpressure
controlvalve. If theconnectorJ204/P204for
theinjectionactuationpressuresensor is not
disconnected,thevoltagetestlampwillremain on
whenthespecialtest is notactive.
Results:
Cat C7 Iap Valve Location Chart
Repair:Replacetheharnessfortheinjection
STOP.
Cat C7 Iap Valve Locations
Repair:Temporarilyinstall a testECM.Repeat
reinstalltheoldECM and verifythattheproblem
reoccurswiththeoldECM.
i01857920
g00725343
Sensor - Test
location of theinjectionactuationpressurecontrolvalve
SystemOperationDescription:
Usethefollowinginformation in order to troubleshoot
· 164-02InjectionActuation Pr SensorErratic(15)
theinjectionactuationpressuresensoragainst a
Thefollowingbackgroundinformation is related