Starving for fuel at high RPMs....or when going uphill with a load...already added fuel injector cleaner, and will replace fuel filter...any other suggestions. need to know where to look for fuel filter location as manual was not in car when purchased. thank you. Rich
I want to say its located on the drivers side frame. Best thing to do is buy a Chilton's or Haynes manual for your Bronco.It has tons of info on how to do stuff to your Bronco. Might be your fuel pump. That's located in the fuel tank.
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Your teansmission could be going out or your rear end (differential) or maybe your loosing compression in the cylinders which will make you loose power.. Also its going up hill its got to move the full weight of the car at an angle which pushes against the car so it has to work harder... And if your going to a really good elevation say 100+ feet invest in a turbo charger BC the air is thinner the higher you go
If fuel filter was full of rust or anything except fuel, some may have moved further down to the injectors and be blocking them. They have very small holes and any 'hard' dirt or grit can block them.
You can try adding a whole bottle of RedX fuel additive cleaner to the gas tank and running with it, it may clean some of the gunge out of the injectors. Next step is too have the injectors removed and tested for efficiency, they will probably have to be replaced. Buying and fitting used injectors would be cheaper than testing yours. In any case, replace the fuel filters to stop any other grit in them moving to the injectors.
if code is low fuel pressure need to check fuel pressure if pressure is low than problem can be fuel pump going bad -or filter..if pressure us good than problem can be with injectors or fuel rail etc.-but need to pressure test system
Your excellent description provides a very short list of possible culprits, since your vehicle's symptoms all appear during periods of higher fuel demand.
(1) fuel filter - clogged - your description is absolutely classic (especially stumbling upon uphill acceleration) for a fuel filter in need of replacement. (2) spark plug wire - one or more bad - an engine can muddle along while traveling over level terrain with one cylinder intermittently failing to fire, but try to go uphill (even the slightest grade), and the engine will skip badly and can even stall if asked to accelerate. (3) in-tank fuel strainer - clogged - same symptoms as clogged fuel filter.
The fuel strainer is a sock-like pre-filter attached to the input side of the in-tank fuel pump.
The troubleshooting section of the 1998 Honda Civic EX manual states:
Priority Action Part Type Cause 1 Inspect Throttle Position Sensor - Faulty or Incorrectly Connected Throttle Position Sensor. 2 Inspect Mass Air Flow Sensor - Damaged, Loose, or Faulty Mass Air Flow Sensor or Circuit. 3 Inspect Choke - Stuck or Improperly Functioning Choke. 4 Inspect Air Cleaner Tempature Sensor - Damaged or Faulty Air Cleaner Tempature Sensor. 5 Inspect Fuel Filter - Clogged or Dirty Fuel Filter. 6 Inspect PCV Valve - Plugged or Damaged PCV Valve. 7 Inspect Carburetor - Worn, Faulty or Damaged Carburetor. 8 Inspect Fuel Injector - Dirty or Worn Fuel Injectors. 9 Inspect Hose (PCV) - Clogged or Collapsed PCV Hoses. 10 Inspect Fuel Pump - Faulty Fuel Pump. 11 Inspect Fuel Pump - Low Fuel Pressure.
Here's a YouTube video describing hoe to replace a fuel filter on a 2000 Honda Civic (the closest I could find for your 1998).