2003 Ford Crown Victoria P-71 bad fuel injectors?

[Matthew]

Beside the LCM and multifunction switch troubles I have got another little problem: When I bought the car about 2 years ago I realized that the engine sometimes started to sputter at about 30 - 50 mph when you press gently on the accelerator within this speed range but his didn´t happen very often. I also realized that the car engine doesn´t run all round on sloping roads at 30 mph. This happens e.g. when you drive down a hill in the city without using the accelerator. But this was sometimes hard to sense. I tried to solve the problem by changing the spark plugs, the ignition coils and the fuel filter. It didn´t help. No problems when you push the pedal to the metal or under/above this speed range. I kept on driving and ignored the problem. But after about 25.000 miles and during the last few weeks the problems have become bigger. The Ford sputters now much rougher within the described speed range and this happens very often. It seems that the idling is also slightly affected. Are these symptoms for bad fuel injectors? Your answers are really appreciated!!!

 

[helpful bob]

It could be that moister or dirt is in the tank and perhaps the last owner drove it a lot with little gas in the tank that could cause problems. I'd try some Lucas gas treatment in it then after using up a few tanks of gas change the gas filter on it again.

I wonder what mileage is on that vehicle it might need the transmission filter and fluid changed on it especially if has around or over 75,000 miles on it.Also it could be a bad spark-plug wire you've not mentioned changing the wires , plus you've mentioned it runs a bit rough now a days when it idles,plus clean the connections where the spark-plug wires connect to ,I'd try that first off before changing or testing the wires , use sandpaper or a wire brush to clean them.


Hope that helps and best of luck.By the way it might help to go over the charging system's connections , the power junctions , battery , alternator , starter , engine block ground and all the grounds , plus any sensor etc plug in connections , one by one and make sure the studs , bolts , nuts, wire connectors are all quite clean too.Also check the grounds going to the different comps on it and the grounds that link the comps together.