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2002 Lincoln LS:
Will Not Start When Cold - Technical Service Bulletin

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Alex Steele
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Question:

 

I have a 2002 Lincoln LS V8 with about 80,000 miles on it. I bought it several years ago with about 18,000 miles on it. The problem I'm having is that occasionally the car just will not start. It is very random, but the car is always cold and it seems to happen more frequently when the weather is cold, but it has happened in the summer as well.

 

When this happens this is how I get it to start. I pump the gas a whole bunch of times and then hold the pedal to the floor for a minute or two. If it doesn't start, I repeat the process. Sometimes it takes 2 or 3 times before it starts. After it starts, all is well.

 

Answer:

 

Your description is a near-miss in comparison to cold-start problems dealt with by a Ford technical service bulletin. I ran across TSB # 03-7-3 with the ALLDATA information system.

 

This one deals with a hard-start condition due to flooding, but only -- I repeat, only -- if the problem occurs with ambient temperatures between 30 and 40 degrees F, and humidity above 75 percent. Sounds like a cold rain, to me.

 

The fix for the 2002 model year LS (V6 or V8) is an updated calibration for the powertrain control module (your engine's computer). But you said it also happened in the summer, and the bulletin is very specific as far as "not" using this fix if the problem occurs anywhere outside the specific temperature and humidity parameters.

 

If it is cranking away in a warmer/dryer climate, move on. Possible causes are then wide spread. The IAC valve, which controls idle speed, is on the list, but that's where another bulletin comes into play. Ford TSB # 03-3-5 deals with accurately diagnosing, or not, the IAC valve as the cause of the problem. Aside from that, an intermittent extended-crank can be caused by ignition issues, too much or too little fuel, so on and so forth.

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Comments:

TechHelp2
08 Jan 2017, 12:55
RE: David, When you turn the key on see if you have 12 volts at the fuel pump during the 2 second prime. If you have the 12 volts and the pump is still not working then you may need a fuel pump.

The pump may have a hard time starting up in the cold weather.
David
08 Jan 2017, 12:35
I have 2002 Lincoln LS 3.9 V8. When colder than 50 degrees the fuel pump won't engage unless I turn the key on and off several times. The colder it is the longer it takes. Once I hear the thump of the fuel pump starting the car starts and runs fine. I have checked the relay, diode, wire connections and just don't know what else to look at.
Rosabel
16 Apr 2016, 02:49
All things cosdrneied, this is a first class post
FRANK
13 Feb 2016, 17:01
To: Tech Help 2
THANK YOU! The temp. in the garage is 55 deg. I have re-set the TB to factory specs. Why I am concerned with the high rpm is .. when the car is FIRST started and you put trans into REVERS you get a whomp .. jolt and everything else is then ok meaning the trans. shifts very smoothly. When warmed up and you put in to R it is smooth.. the way my other car is. Of course the rpm at this point is about 700 and drops to about 650 so all is good. When driving and engine is warm on flat surface car likes to find 1000 rpm and go 20 mph! This is my wife's car and I get to drive it for oil changes! Got one today!
YOU HAVE BEEN VERY HELPFUL & PROMPT REPLY APPRECIATED!!

FRANK
TechHelp2
13 Feb 2016, 16:37
RE: Frank, The IAC (Idle Air Control) is not adjustable. It is controlled by the PCM (Power train Control Module). Depending on how cold it is depends on the high end of the RPM control. The high idle is calculated by many input sensors from the engine including the engine coolant sensor. The high idle is then calculated.

When you adjusted the throttle body adjusting screw you threw off the minimum idle setting which affects the operation of the IAC motor. The minimum idle has to be reset to manufacturer specs.

From what you are explaining before you touched the throttle body screw is that the engine RPM is operating normal under the cold start conditions.
FRANK
13 Feb 2016, 12:11
I have a LS 2000/which I purchased in 2000 with just 44k miles. When cold starting it tacks @ 2000! Soon drops to 1500 and then to 1000 and finally to 800. How do I slow this down! I tried adjusting the throttle body but to very little effect. From your article it sounds like it could be the IAC. What is the IAC, what does it look like and where is it?

I APPRECIATE YOUR HELP!!

Frank
kurt
01 Dec 2010, 11:17
quoted from another board. "Just wanted to offer this to those of you out there that are having problem with ls cold weather no start issue. Wow! My husband and i solved this frustrating problem. Symptoms were just like a lot of others..... Cold weather, no start, would crank, sometimes get to start by pressing gas pedal while starting, after getting started would run fine and restart all day fine. It was the IAC!!!!! My husband first removed and cleaned and saw some improvement, then replaced with new one. That was it! Part was $54 and easy to replace. IAC problems (applies only to 2000-2002, 2003-2006 do not have an IAC) are pretty easy to diagnose. If it won't start well normally, but will start well with the gas pedal pressed half way down, then it is the IAC.

 

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