Lincoln Town Car Hesitation

24 May 2015 | Author: | Comments Off on Lincoln Town Car Hesitation
Lincoln Town Car

Questions and Answers

Lincoln Town Car Hesitation

Q. Hi I am not sure if I got the right place? I have a 1996 Lincoln Town Car 4.6 liter V-8 that is driving me to drink. The frustration is not longer bearable! I has a hesitation problem that, no matter what I do, will not go away.

I have replaced the in line fuel filter got a little better, trouble codes of P0300 and P0304 came up so I installed new wires and plugs. I replaced the Throttle Position Sensor. A little better.

I tried pumping vacuum and withdrawing vacuum to the EGR and it stalled the engine so I am assuming that the EGR is okay. After replacing all of these parts the engine light does not come on any more. When cold it will throttle up pretty good when goosing the engine for about 30 seconds then it starts to bog out.

If you insist on holding the throttle in the same position it will pop or back fire, it sounds to be through the throttle body.

Then you smell a strong gas odor from under the hood. No leaks found. After about a minute of this nonsense it will finally go to its correct RPM level. If you do not allow the engine to return to is idle rpm you can goose it as often as you like and it will accept the fuel.

If you allow the engine to return to its idle rpm and try to surprise it with a shot of gas it bogs out for a few seconds. It is almost like you have to play games with the accelerator to find the sweet spot for it to kick in. When cold bogs and pops, when warm just bogs.

The idle on the car is perfect and smooth. It is only from low idle it will not respond. Driving you have to pre-load the engine with gas until it smooths out then go.

It will accelerate normally until you put a very heavy load on it and will go in to passing gear pedal to the floor it will bog out.

I have been running a very good gas treatment through it and have noticed no improvement. The vacuum spears to be very strong as well as the fuel pressure. The symptoms do not vary you can set your watch to them every day that you start the car they are Identical every time.

I thought that maybe it could be a leak in the intake manifold or throttle body so I sprayed starter fluid all around the edges and mounts. No change in rpm. Then to be definite I took a gallon jug of water a poured it all over the intake and throttle body no change in idle or rpm. I checked all hoses and electric fuses and relays.

All appear to be fine.

After you play the little bogging game with it from a idle whether there is a load on it or not. It does drive perfectly normal as long as you only require 60% percent of the pedal. If this were a carbureted engine it is as if the secondary were not opening up on demand.

Lincoln Town Car

When cold I would say that it is a timing issue with the popping. As it warms up it is displaying symptoms that I would think lack of gas or air. I hope that you can understand my frustration now.

I hope to hear from you soon.


A. It sounds like you have a Mass Airflow Sensor problem. Here’s a good tip on how to fix it. Ford Expedition P0171 P0174 and Ford Mass Air Flow Sensors .

Additional Information provided courtesy of ALLDATA

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