My NXS has lost power a couple times now. The first time I was coming up an inclined on ramp and it acted like I wasn't getting any fuel (my best description of what happened) and I got off the fuel and then I got back on it and it's ran fine until today. It did the same thing today taking off from a stop light going up an incline. I thought maybe I was crazy the first time until it happened today. It has happened now twice in about 1500 miles. The truck does have low boost(30-38lbs random)but I don't know if that has anything to do with it just throwing that out there. What do you think is going on? I know if I take it to a shop their not going to do anything if I can't replicate it.
C15 NXS Accert cuts out
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Dorsey, Jun 23, 2015.
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Sounds like you have a small leak in the fuel system somewhere and it is losing prime.
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Might sound stupid, check your coolant level. Had my truck "shut down" on me twice in the same day. Got under the hood to check things out and noticed a pin hole in the coolant reservoir. Until repaired, it would shut down every time coolant got low.
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It doesn't shut down just loses power and sputters and i let off the accelerator(naturally) and then back on and everything is fine again.
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It's likely one of three things:
1) TPS signal to ECM, there may be codes
2) Air in fuel
3) Voltage to ECM
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