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tbi gurus need help

dheavychevy38

1/2 ton status
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Jan 6, 2003
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Location
Algonquin,illinois
Ok have a 91 k2500 replaced the oil switch and fuel pump relay and the fuel pump heres the problem the truck starts runs and then dies say less then a min of running? Need help asap thanks denny
 
check all of your vacume lines and the seal between the tb and intake manifold. use either wd40 or a propane torch and just bring the propane near all fittings and if the idle goes up thats your leak. but you need to get the truck running first. but definately check all hoses they can make a big difference.
 
it was running fine when we had that last snow it's a plow truck and the next day it started doing this? but i will check all my lines right
 
I've had this same problem before and found that the hose to the MAP sensor had come off. Also if the hose is plugged or the sensor is bad it could cause this.
 

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