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Old 01-05-2012, 08:34 PM
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F450 Hard start (unless i/c tube unhooked)

Hey guys, thought I'de try to get my brother some help. So.. He bought this 2002 f450 tow truck a while back after I convinced him for his budget a 7.3 was going to be best. WELL, think he might have picked the worst one on the west coast of BC. He has an ongoing issue with the truck where it's gutless up till about 1800rpm. So he bought a bully dog, not a lick of difference (not like my truck with the garbage superchip that was in it). He probably would run a 24 second quarter. So he replaces the injectors with Brand new (split shot factorys). No luck. He has guages and is running about 22lbs boost wide throttle, and I seen his icp hit about 3200psi max. He has replaced the glow plugs and relay. Yesterday he put in a k&n for god knows what

He says the thing will not start in the mornings, Starts easier if plugged in but still not acceptable. He was out trying to start it in his impound yesterday and she wouldnt go. So he decided to try some stuff. He found that iff he disconnected the intercooler pipe on the passenger side the truck fires right up cold. Keep in mind where we live it RARELY gets below 0. we are talking winters between 2-10 degrees. Any help would be appreciated. Bottom line I guess I need to be able to rely on this one as mine gets the odd lift back to the shop!! hahaha
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Old 01-07-2012, 11:43 AM
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Seems this is a tough one?
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Old 01-12-2012, 04:07 PM
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i am running a 2000 f550 and i couldnt start it below 32 degrees until i did the stancor gpr mod and went to mobil 1 5w-40 turbo diesel truck. starts like a charm now. I also went with single shots when i replaced my injectors, jody told me they should start better because they require less high pressure oil to fire. so far the combo is just what the doctor ordered
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Old 01-12-2012, 04:10 PM
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also i dont know if your truck will have the 4.88's or the 4.10's but my truck with 4.88 is so slow accelerating that it adds about ten minutes to my morning commute. nature of the beast i guess, does he have plenty of pulling power?
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Old 01-13-2012, 07:52 PM
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Thanks for the reply, he says he gas lots of pulling power. He also informed me that it weighs 12000lbs by itself so i guess that might explain the lack of rip-it-up. He has been throwing a 1316 IDM, p0470 (by passed ebv) but has switched it with mine before and no difference. He is going to try oil swap and gpr mod (glow plug relay??) Thanks again.
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Old 01-14-2012, 04:34 AM
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Yeah it the glow plug relay. The proper stancor part number is 586-902 they are about $45. When I bought mine it was under the name white Rodgers also. Check out guzzles stancor gpr mod page if you need any visual aids. While your under there and in the DIY mod mood I would highly recommend the napa 6637 air filter mod too. It was the best $40 I spent during my whole project. It will flow about twice what a factory replacement k&n will.
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Old 01-16-2012, 11:29 AM
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Hopefully this stuff works for him, He's already talking about a fummins..
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