So I bought a 1986 F250, 6.9L, No turbo, 4x4, extended cab, long bed....
Drove the thing almost 300 miles home with nary a problem. Its geared pretty low, so the engine is just SCREAMING at 65mph. So I just keep it to around 60 on the highway. I have now owned this truck a total of 5 days and about 500 miles. A couple of days ago, I was driving to work and it sort of coughed and spit out a huge cloud of blue smoke. When I disengaged the clutch, the engine promptly died, but fired right back up when I hit the starter. Made it to work without further incident. Yesterday, I found that if I kept my foot out of it and just let it do its thing, I could run 60. Today, it died outright. Won't even fire back up. If it was a gas engine, I'd say the ignition coil had quit. If I get it rolling (like down a hill), and put it in gear, it'll blow blue smoke out the tail pipe but won't fire.
Changed the fuel filter, purged the system, still no luck. Checked the fuel in the filter and it had just a little bit of water in it. Drained the fuel/water separator. Still won't run. Anyone have any thoughts?
Sounds like your getting fuel as indicated by the blue smoke but the glow plugs may be shot. An easy way to check without tearing into anything is to plug in the block heater for a few hours and see if it starts then.
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-Justin
1984 F250 6.9 C6 2WD Push Button Wellman GPs, No Soup bowl. Wix 33439 Water Separator, Carter P4594 fuel pump, Custom 3" Exhaust, NTZ Oil Bypass Filter, VDO Vision water temp gauge, ISSPRO EV Pyro
I am new too... Glad to be here. Bought a 85 F350 6.9 Diesel just yesterday. Put 100 miles on it today. Fun to drive, but I was surprised myself that it screams along at 65MPH,... with a top speed of just 75! Still very cool though, and it pulls hard from a dead stop.
Not to high jack the thread, but could somebody point out where the block heater is on this thing. I wanted to "check for cracks" as I was reading online, and I also wanted to know so I can use it when it is under 32*F.
Bad glow plugs will not cause the engine to shut down. They are only used to start the engine. Diesels don't use spark for ignition, high compression is the main ingredient along with heat.
Crack a line from the Injector pump to one of the injectors. With your foot to the floor, turn it over and have someone check for fuel bubbling out the fitting you lossened up. If no fuel then you need to make sure the lift pump isn't shot. Search this forum using "FUEL FLOW TEST" and it will show you how to do it.
The block heater is in the place of a "freeze plug" on the passenger side farthest back behind the starter.
Report back here and we will get you smiling again. You need to update your signature with info about your truck, auto/manual, miles, etc...
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1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
1997 Jayco 323RKS fifth wheel w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here
I think I've pretty well got it sussed. Just have to get a fuel return line kit. No one here has them in stock, so I ordered one up through Napa. Once that gets here I'll replace all the fuel return lines and purge the system again.
Looks like the fuel return lines are a scheduled maintenance item with an interval of about 100,000 miles.
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86 F250 Extended cab, 4x4, T-18/T-19, custom drive shafts. Time for axle upgrades.
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