Poorman
Registered User
I've owned this 86 f350 dually 6.9 since about 1990, not sure of the miles because the daughter of the original owner said her dad had disconnected the odometer. I'm guessing 250-275000. It's been running great but smoking bad on cold startups but starts easily. I replaced the injectors/injector pump/return lines 18,000 miles ago (7.5 years ago). Over the last couple years sometimes when I get a mile from the house and start up a modest hill from a stop sign it starts belching smoke so bad I can't see the road behind me (embarrassing) but when I crest the hill and the revs pick up it cleans out and runs smoke free. So I thought maybe it was time for a rebuild so I did a compression test today (real fun) got these # 380/390/405/375/440/405/415/400 engine 2 hours post running, pugged in, so warm. About 8 revolutions but the last 3 or 4 only add another 10# or so. I checked the glow plugs (had to remove ) and 5 were dead, they have less than 5000 miles on them, didn't expect that because it starts easily. That could cause the smoky starts but I think something else is causing the horrible smoke a mile down the road on the first hill. I'm suspicious of my injectors, any ideas?