This may seem funny! But check and or replace fuel filter. it does not seem to be getting enough of fuel. if not, the air and fuel mixture will be off , and you will get a back fire from intake manifold. a fuel filter if clogging up will loose power when driving. more under load. the reason it starts up is, when off the dirt settles to the bottom of filter. so fuel flow is ok, but the more its driven or started, the dirt rises and causes a problem. Does it stall out at stops! this is another sign filter is bad. lack of power. Hope this helps! Good-Day!
Changed the filter... nothing changed
Hi Tristran, There could be something in what you say about the fuel pumps. If you fitted a new pump and it seemed to run OK for a week, maybe the line from the tank is restricted. Could be the fuel filter but that normally shows as a problem all the time. At that mileage there may be crud in the tank or line. Have you always refuelled at good gas stations? Have you ever fuelled from an unknown jerry can? Next is to check the tank cap and tank breather pipes are functioning OK. Have a careful think as to what you were doing before the fault arose and at the time you first had it. Have you made any changes or did it run perfectly one day and not the next. If it was that sudden, ie you came in from work one evening, switched off and the next morning it played up then I would seek expert local help because that points to failure of some electrical item in the fuelling system which may need plug in diagnostics. I take it there are no fault codes flashing etc?
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Tristan, you don't say what truck, what engine, how old, what miles, last service, injection or carb.
You've spent money on it in the hope of getting lucky. You need to focus on the problem. Back firing and lack of acceleration is usually a sign of a massive air leak into the manifold messing up the carefully managed fuel system. Have a good look at all the hoses on the smog system, the brake servo hose, and any other emission or vacuum hoses that could allow air in. Just for kicks try crimping the hoses one at a time with a pair of grips/ pliers and see if it suddenly stops it. GENTLY though! If this fails then look toward the inlet / exhaust gaskets doing the same thing, though much harder to pinpoint.
Its a 1997 chevrolet suburban k1500 awd, 350 vortec, 150,000, throttlebody injection
Tristan, I've been going through the GM / Vortec forums. Vortec engines around your year and mileage apparently suffer inlet gasket problems which is back to what I said about air leaking in and making the mixture excessively weak. Have you had a look at the plugs after warm up? They should be coffee colour, mid to light brown. If they are anything like white in the centre then weak mixture is suspected. Don't make any changes to the TBI settings, but as I said earlier look for air leaks.
Sorry, mean't to say there's a fair bit on chevytalk.org about vortec problems.
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SOURCE: Car starts then dies
yea if it runs on start fluid then your not getting enough fuel .. you are likley going to have to change out that fuel pump .. you might hear it come on but it might not be pumping fluid forward .. good luck
SOURCE: Car dies at random moments
I just had this problem and replaced the camshaft sensor, crankshaft sensor, and coolant temp sensor. i replaced these items because of high mileage. try these but first check your relays located under the hood on the passenger side. sometimes they get hot and fail.
SOURCE: 2004 dodge 3500 cummins diesel sometimes hesitates then dies
My 2004 had the same issue and i replaced the transfer pump. It started right up and ran fine until the next morning i was driving it stalled. Now it won't start up not even with starting fluid.
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