i just recently purchase a 1990 d250 that has 200,000 miles and it runs and sounds great. i was wondering what all i should look at and check out before any modifications. just need to know if there is any tuning that needs to be done.

 

kdp!!! and guages before you do anything!!!! haha then start your power stuff if it runs good and guages seem pretty normal

 

yea, ive already got a pyrometer. i havent fixed the kdp yet. probably wouldnt be a bad idea before i kill it. but i was wondering about things like the valves, valve springs, transmission, are the valve covers tight enough, etc. basically just a thorough inspection. this is my first diesel and i just want to make sure it stays in good working order. also i love this truck so much i dont think ill ever own anything but a diesel again

 

yeah i know how you feel i will never own anything but a first gen as my dailey driver. i have 200,000 on my truck and i have never ckecked anything like valve springs and what not, i have never had to it has always ran amazing. i do however change every fluid in my truck every 3,000 just because i love working on my truck and have way too much time on my hands

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have you read the sticky about turning up the pump? i would definatly do that stuff too and if you need help with that there is like 6 or 8 videos on youtube that are step by step and make it very easy to understand

 

and see one of the things that makes me nervous is im so used to gas vehichles, and if something is wrong i can hear it. but in my cummins if it aint makin a noise it aint running. so im just trying to get acqauinted with it.