I have a 2002 V10 ford chassis motorhome. Took it in to have exhaust manifold bolts replaced. Now will not start. No fuel. You can hear the fuel pump running but when cas line opened at inline filter under chassis very little trickle of gas comes out. Could the pump be running and not pumping or is there a filter prior to the pump in the fuel tank that is causing the problem??? Never had any sign of this problem till now.

O2 sensor location F53 chassis, 1996 Ford 460? - RV.Net

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Jun 30, 2013 - The O2 sensor (only one) on you chassis is located at the end of the "Y" pipe, just in front of the resonator. It is mounted on top of the pipe.
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Are you getting spark to the plugs ?

https://www.youtube.com/watch?v=un30TdIlinU

If you are wanting to change the bolts it is probably because you have a leak in the system. Some motorhomes are real difficult to work on. Be patient or let a professional do it. Bolts could be broken, manifold could be cracked or warped.

If it has an inertia switch, it should be on the passenger side near the door.
I would first check the pump relay to see if it is sending power to the pump thru the switch. And do you have a switch for dual tanks ?

It sounds like you might have a clogged catalatic converter on the exhaust system.

1 Ignition system not operating properly
2 Dirtyor clogged fuel injector(s).
3 Low fuel pressure. Check for proper operation of the fuel pump and for restrictions in the fuel filter and lines.
4 Fuel injectionor engine control systems malfunction.
5 Vacuum leak at the intake manifold or vacuum hoses.
6 Restricted air filter.
7 Fuel pump or pressure regulator defective.

Removal & Installation

2.2L Engine

1. Before servicing the vehicle, refer to the precautions section.
2. Disconnect the negative battery cable.
3. Drain the engine coolant.
4. Remove or disconnect the following:
   Exhaust manifold, if equipped with n automatic transaxle Right front wheel Splash shield Water pump sprocket access plate from the timing cover
   
   
   
   Fig. Remove the water pump sprocket access plate from the timing cover -2.2L engine
   
5. Attach Water Pump Sprocket Holding Tool J 43651to the sprocket using the access plate bolts to secure the tool to the engine front cover.
   Sprocket to water pump bolts Engine block to water pump bolt Engine front cover to water pump bolt Thermostat housing to water pump feed pipe 2 water pump to engine block bolts Water pump
   
   
   
   Fig. Water pump mounting-2.2L engine
   

To install:

1. Use a threaded stud in the water pump hub to align the hub to the water pump sprocket.
   Water pump and bolts Thermostat housing to water pump feed pipe Engine front cover bolt and engine block to water pump bolt. Tighten the bolts to 15 ft. lbs. (20 Nm) 2 of the water pump sprocket to water pump bolts
   
2. Remove the threaded stud.
   Last water pump sprocket to water pump bolt and tighten the sprocket bolts to 89 inch lbs. (10 Nm).
3. Remove the tool.
   Water pump sprocket access plate to the timing cover and tighten the bolts to 89 inch lbs. (10 Nm) Splash shield Right front wheel Exhaust manifold, if removed
4. Fill the cooling system.
5. Connect the negative battery cable.

2.4L Engine

1. Before servicing the vehicle, refer to the precautions section.
2. Disconnect the negative battery cable.
3. Drain the cooling system.
4. Remove or disconnect the following:
   WARNING Do not rotate the flex coupling more than 4 degrees or damage may occur. Oxygen Sensor (O 2 S) electrical connector Exhaust manifold heat shield Coolant inlet housing bolt through the exhaust manifold Exhaust manifold brace-to-manifold bolt Manifold-to-exhaust pipe studs Coolant inlet housing-to-water pump cover bolt Exhaust pipe from the exhaust manifold by pulling it downward Coolant inlet pipe from the oil pan Brake vacuum pipe from the camshaft housing Exhaust manifold from the cylinder head Heater hose from the heater outlet pipe Timing chain cover and tensioner Water pump cover-to-engine bolts 3 water pump-to-timing chain housing nuts Water pump and cover assembly Water pump cover from the pump
   
   
   
   Fig. Exploded view of the water pump mounting-2.4L engine
   

continue...

if it was me i would start with a new fuel filter and some STP gas treatment if you let it sit for a long time there maybe water in the gas tank and try these websites to see if they have your motorhome listed its www.autozone.com and the other one is www.alladtadiy.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your motor home

2.4 enigine is the harder of the 3 enignes. it will need a timing chain to be removed and a coolant tube in the back of the engine to be removed. this job on the book calls for almost 7 hours.

if its 3.3 or 3100 its alot easier.

3100 is just 4 10mm pulley bolts and 5 or 6 small 8mm water pump bolts.

3.3 is alittle more work, but same concept as 3100 engine. more owkr only cause its in a tighter area.

good luck,
michael

Possible bad fuel pump or fuel pump relay.