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Frostee
Dec 12, 2013, 06:38 AM
I'm working on a 91 international 4700 box truck, starts and idles just fine but under driving load loses power and dies. Will start up after about 10 min. changed out fuel filter/ with no improvement. Any ideas??

TxGreaseMonkey
Dec 12, 2013, 07:09 AM
Is that a diesel?

Frostee
Dec 12, 2013, 09:52 AM
Yes, in line 6, 5.9 / 360cid

TxGreaseMonkey
Dec 12, 2013, 11:58 AM
Sometimes, fuel pump clearances increase, when it warms up under load, and fuel pressure drops. Check the fuel pressure, after it dies--it may need a new fuel pump.