It was driving fine it has been park for about a year,brought new batt, fuel pump, and it starts but struggles staying on. its a 93 chevrolet astro van . when trying to keep it going i hear like a hissing sound
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Need new heaters for the starting ,as for the emmisions light then this is another problem ,on the exhaust is a NO2 filter abd its blocking up ,whet you need to do is add a bottle of diesel injector cleaner ,dont read the instructions just add a bottle to half a tank of fuel or more and then drive at legal speed limit for half hour or so and this should clear it out if it doesnt ,wait till fuel level goes down and refill and another bottle it will clear the filter out eventually .Now if the heaters dont cure the starting then fit a non return valve on the fuel inlet pipe as well
Can you hear the fuel pump run, if not it may have failed again. I have seen new fuel pumps last a day or two and then fail. If your pump is working then replace the fuel filter. Anytime you open the fuel system, you should replace the filter.
This sound like a fuel pump problem to me. I had the same problem. It would idle and rev fine but as soon as in gear or hav load to pull it will just die or struggle to stay alive. Done a fuel pump change and problem solved.
the impellors in the water pump are prone to corrosion,especially if no or incorrect radiator additives have been used .this will cause water to stay in motor & boil whilst the water in the radiator stays cold because it cannot circulate.try flushing radiator ,installing a new thermostat (which is more than likely not opening )& radiator cap,refil with correct additive,.if the car still over heats then you will need to replace the water pump.bugger!!