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Won't start. changes fuel pump and computer. - 1999 Lincoln Navigator

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Sounds like you Electronic Ignition Module. Did this vehicle just happen to shut down on you while just driving down the road?

Posted on Jul 29, 2009

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1 Answer

2002 Durango won't start change fuel pump, cramnkshaft sensor,


"No Bus" means something happened between the body computer and the engine computer. They are not connected to each other.
Usually a fuse, one of the computers, or the wiring harness in between.

Apr 07, 2013 | 2002 Dodge Durango

4 Answers

My car won't start I have changed the coil fuel pump fuel pump relay and the Mfi relay I now think its the crank shaft relay but I do not know help me !


Sounds like maybe the main computer is bad. When you cranked the engine there is not any indication that it is firing. If you have changed the fuel pump and coil and it still wont even fire, the computer is most likely the cause. Even if the timming was off you would still get some indication that it was trying to start although it probably would not if the timming was off, but the fact it's not even trying to fire yeah that's my take.

Mar 23, 2013 | Cars & Trucks

1 Answer

My 2004 chevy venture won't start. Changed the


Did the fuel pump come on?

Did you check fuel pressure at the motor?


Try jumping the relay to get pump on?

Read a wiring diagram-- so you know what your doing?

Check Power & Grounds to pump when the tank was down?

Dec 22, 2012 | Cars & Trucks

1 Answer

93 chrysler t&c awd changed fuel pump and filter, van ran fine again for about 2 months now won't start and don't hear the fuel pump. changed the oil pressure sending unit and still won


fuel pick-up in tank is blocked it has a sock over the end as a gross filter to keep out any big junk from getting sucked into the pump and causing damage to it. the sock can get so plugged up that no fuel will flow, causing the pump to run for a short time then with no fuel flow to cool it it trips the safety and shuts off

Aug 12, 2012 | Cars & Trucks

1 Answer

Truck stalled wouldn't start.


I can understand you being frustrated.
There really is no way to tell if the fuel pump was the problem at this point.
If the security system fails, you should see "security" light up on the cluster.
The key lock has a sensor that reads the chip in the key. If the sensor fails or the chip fails the computer won't let the vehicle start.
Most of the time when the security system is at fault, the vehicle won't start, but it won't cause the engine to stall.
You might want to have someone check the fuel pressure and spark at the plugs if you don't see the security light on the cluster.
Could be the fuel pump relay and a list of other things.
I would probably check the computer for trouble codes too.

Jul 21, 2012 | 1996 GMC Sierra

1 Answer

Last week her trooper just died,wouldn't startt.We changed the fuel pump it ran for a week again it won't start.


Did you check the fuel pressure before all of this fuel pump replacement? If the fuel filter is old enough to be clogged up, it should have been changed long before replacing a fuel pump unit. Your fuel filter should be changed every 30,000 miles. However, it would have to be TOTALLY clogged up to keep the engine from starting. It would have been causing all kinds of drivability problems LONG before that could happen.

Then, has anybody bothered to check for spark when the engine will not start? Has anyone scanned the onboard computer? (which happens to be in full control of both the fuel system and the ignition system)

You just might be trying to repair the wrong system...

There is no way anyone online can accurately tell you why it will not run without checking the vehicle first....although many uneducated DIYers might GUESS for you...which seems to be just as good as you are already doing....

PROPER DIAGNOSIS REQUIRED!

May 20, 2012 | Cars & Trucks

1 Answer

No fuel


It could possibly be a faulty Crankshaft Position Sensor. If the computer doesn't see that the crankshaft is spinning, it won't activate the fuel pump.

Mar 05, 2012 | 2000 Mitsubishi Eclipse

1 Answer

Car won't start; mechanic said it was fuel pump; fixed problem but car still won't start...any suggestions of what could be?


When you changed your fuel pump did you also change the fuel filter? If not, that would be the next logical step. While you have it disconnected you can also check to make sure the fuel pump is pumping the fuel.

Aug 18, 2011 | 1997 Ford Expedition

1 Answer

My ford expedition won't start i change the fuel


If it a diesel then you must be aware that when changing a filter and pump they must be full of fuel, otherwise it won't **** the fuel into the engine.

Jul 11, 2011 | 1997 Ford Expedition

3 Answers

1995 e34 520i won`t start


i would check the fuse for the fuel pump and the relay.

May 26, 2008 | 1994 BMW 5 Series

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