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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4291
Experience:  Owner at DJ Wilson
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ISL caps (frecent new lift pump) stopped running at speed,

Customer Question

ISL caps (frecent new lift pump) stopped running at speed, will not crank and lift pump does on run at all. Could it be a ecm fuse/
Submitted: 6 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 6 months ago.
Hi Richard, My name is***** will be glad to try to help. First I need to know what year and make chassis this is in. Also does the check engine light come on and cycle with the key on? If not then you have lost either power and ground from the ECM or a faulty ECM. If the check engine light comes on it means the ECM is powering and if so see if there are any active codes logged in the ECM. Let me know what codes you have. The lift pump should come on with the key on so check all fuses and relays. Let me know

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