Mine backfired this morning. Scared me about into a heart attack, and neighbors were walking out of there houses looking.
Did it trying to start. It did not catch the first attempt, so I cycled again and cranked and POW (like a gun shot) and idle smoothly.
Did some diesel start to burn, but burnt slow so the exhaust valve was open when it finally burnt?
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1996 F-250 extended cab long box five speed. Home made Tymar, 203 Stat, 60 gal in bed fuel cell, 315/75's, no muffler, ebpv welded open 3" to 3" DP, Babies. 290K, still chugging, and still smoking when cold.
UPDATED 1/1/09 Replace so far. 1 LUK flywheel+clutch, 2 thermostats, 2 set of brakes, 1 set of calipers, 5 CPS, 3 sets of tires, 2 Transfer pumps, 1 Injector modual, 1 Computer, 2 Alt, 2 sets of batteries, 1 Water pump, 6 Belts, 1 PS hose, 2 Sets ball joints, 2 set u-joints, 2 carrier bearing, 2 Speed sensors, 1 oil pres sender, 1 temp sender, 4 sets of e-break cables, 1 front fuel tank, 2 rear fuel tanks, 2 set of glow plugs, 7 Glow plug relays, Oil galley o-rings, Turbo pedistal o-rings, EBPV o-rings, 3 sets of Injector O-rings, 1 Vac-pump, 1 new carpet, 1 total paint job.Total $$$ in repairs v/s miles driven = 4.6 cents per mile. Add fuel to that it jumps to 16.5 cents per mile over the life of the truck.
Did it back fire out of the exhaust?? or out of the intake? I've had mine back fire out the intake before. I tried to start it but the GPR was bad...next try the GPR made, plugs got hot and BANG...gave me a case of the "Wide Eyes" and creased seat cover. I've never heard one backfiring through the exhaust yet.
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Rick:Red 97 F350 CC DRW 4.10/LS E4OD, 28,000GVW trans cooler w/170F thermostat, remote ATF filter, Mobil 1 ATF, Sonnax valve & Tricum springs, Tymar Hi Performance Open Air Intake System W/Donaldson B085011 filter, IH water pump w/integrated coolant filter, BD downpipe & BD 4" cat back exhaust, "SWAMPED", Tymar HX mod, Tymar/Bill's 4 posn. "flip-chip" (this bad boy rocks), Isspro EV gages in 3 hole PITA Pod, "Harpooned" Fuel tanks, Bilstein shocks, Gutted EBPV, Alpine CDA-9825 head unit, Pioneer TS-A1671R 6 1/2" 220W Front, Pioneer TS-A6880R 6"X8" 240W rear, FOKISD member, Beavercreek, Ohio (near Dayton)
Not sure if it was from the intake or exhaust. I was standing outside the truck with my head inside. It sounded like it came from the tail pipe?
Why would it fire out the intake?
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1996 F-250 extended cab long box five speed. Home made Tymar, 203 Stat, 60 gal in bed fuel cell, 315/75's, no muffler, ebpv welded open 3" to 3" DP, Babies. 290K, still chugging, and still smoking when cold.
UPDATED 1/1/09 Replace so far. 1 LUK flywheel+clutch, 2 thermostats, 2 set of brakes, 1 set of calipers, 5 CPS, 3 sets of tires, 2 Transfer pumps, 1 Injector modual, 1 Computer, 2 Alt, 2 sets of batteries, 1 Water pump, 6 Belts, 1 PS hose, 2 Sets ball joints, 2 set u-joints, 2 carrier bearing, 2 Speed sensors, 1 oil pres sender, 1 temp sender, 4 sets of e-break cables, 1 front fuel tank, 2 rear fuel tanks, 2 set of glow plugs, 7 Glow plug relays, Oil galley o-rings, Turbo pedistal o-rings, EBPV o-rings, 3 sets of Injector O-rings, 1 Vac-pump, 1 new carpet, 1 total paint job.Total $$$ in repairs v/s miles driven = 4.6 cents per mile. Add fuel to that it jumps to 16.5 cents per mile over the life of the truck.
When it is cold, mine tends to do that quite a bit because I have had to cycle my glow plugs more than once. When this happens, I am trying to crank the truck up, doesn't start, turn key off, back on, and while i am giving the GP's more time to heat, it will produce a sound just short of a sonic boom. It seems to me that the cylinders have filled with raw diesel, then as the GP's get hot, they light the raw fuel off causing the boom. At least that is my theory anyway. And in my case, it seems to be coming out of the tailpipe...and the up pipes since I have a leak up there anyway!!
96 Crew 4x4 CC, Maddog Stage 2's, Banks Intercooler & Guages, E4OD in Amsoil and Tru-Cooled, 410's, 4" Skyjacker Lift, 35"BFG M/T, Tejon Bumpers, RS9000's, Grant Wheel w/CC adapt. Bad Boyz Forever, TYMAR'ed By DaleI:all2dale@msn.com, A few secrets from Eddin's House of Diesels, Vol. FF,Medic, TDS Help Directory Dont Laugh, She's Paid For! !thgiR peeK ciffarT rewolS"
it is because you guys insist on cycling the plugs, you wait until teh plugs shut off, pump raw fuel in an unheated cyl. , if you let the plugs cycle all you did was heat the air in the cyl. which goes right out the exhaust when you turn it over, that is why it doesn't start well. Try it thsi way, turn key on, put seatbelt on, count to 10 and turn it over TIL it STARTS, thsi way the GPs are still turned on and hot which lights up the fuel.
GPs are NOT there to heat the cyl, they are there to assist lighting off the compressed fuel/air mix before the cyl warms up. Dodge have a heater plate in the intake to heat teh AIR, some Perkins have a GP in the intake tract to again heat the AIR.
If your unit will not start as be the method above then yout GPR and or GP are weak or failing, it really is that simple.
__________________ Sold to JCart , 1997 F250 FireTruck Red,CC SB,auto( Presicion TC, HD-2Tugger),5" exhaust, Swamp 140cc injectors, TWildman 4-pos chip,open air cleaner, I/C w Banks intake, ,AIC,dual electric fans,Sky mfg RSK w/ D60w/ARB locker,she's well taken care of now pictures
2004 Dodge 3500 twin turbo 525hp rocket
Yeah I had mine do the same thing once when I was having trouble with the GPR, it lit off a cylinder and though it wasn't loud it gave the engine a big jump. I guess yours must have happened when a valve was open so then it banged out either the intake or exhaust.
when mine was stock if i realy got on it and let off and got on it again it would back fire and throw a flame out the tailpipe you could see at night [img]/ubbthreads/images/graemlins/smokin.gif[/img]
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I really like this post for information and have to say that BigRedCCDually had me LMAO with his "creased my seat cover" comment. I am still giggling. [img]/ubbthreads/images/graemlins/warmsmile.gif[/img]
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1997 F-250 Heavy, Super-Cab, 4:10's, E4OD with FTVB, 97,100 miles, build date 09/24/97, Tymar Air Filter, TRU-COOL 4590, Warren Premium's and Rhino Lined.
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