My buddy has a 6.5 turbo diesel in a 94 3/4 chevy. He cannot go over 55mph. The motor starts bogging down. What could be the problem ? Sensor, module, need help fast.. Thanks for the help.

 

has the fuel filter been changed lately and has the air filter been looked at

 

that doesnt seem like a fuel problem to me. does it run fine until 55mph? seems like a computer or sensor problem to me. but i couldnt tell you exactly which ones im not too up on these

 

is it an auto? any codes?

 

try ssdieselsupply.com email walt he'll get back to you on it if you have any codes put them in the email its on there tech page had a 1997 6.5 sold it to my friend did a lot to it could run with the stock late models no problem

 

Yes it runs and idles fine until you get to around 50 - 55 mph then it wont go any faster. Something was mentioned about a throttle position sensor???

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I read something about replacing the PMD could this be the problem?(pump mounted driver) is that small black box mounted on the side of your injection pump. It is a signal amplifier that powers the fuel solenoid

 

no pmd is fine if it runs good except above 55 mph

 

Woody35, i missed your previous post ! It is an automatic. No check engine light is on, not to say that the light isn't burnt out. I will try to get the codes on it if it has any.

 

there might be some stored codes too that wont trip the ses light. im thinking its something with the tranny. i wish i had my factory service books but there currently in another state being used by my friend because they would have some good diacnostic things to do.