05 Lincoln LS V6-Hesitation/Backfires Under Light Acceleration

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Eurythmian

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OK Guys - My car only has 44,000 miles on it. It's been very well maintained.

I just had all 6 spark plugs and ignition coils replaced at Don Davis FORD-Lincoln-Mercury here in Arlington, Texas. I had them replace all the plugs and four of the coils... I did the last two myself to save a little cash. They gave it a clean bill of health for a grand total over $!,000.00.:mad:

Now the car hesitates under slight acceleration. If I get on it or drive it somewhat more aggressive, it seems to not do it. (I shouldn't have to drive the car hard to keep it running!):mad:

It happens when I slow down to go around a corner-then slightly give it gas. Or when a light changes to green and I don't need to come to a complete stop. When I slightly give it gas, the car hesitates (seems to have no power) and then I hear what sounds like backfiring from under the hood. Like it's in the intake or something. If I let off the gas then punch it, it comes out of it.

Any ideas what is wrong now? :confused:
 
This is what my car has been doing since I bawt it last September at 47k miles but it doesnt backfire it just hesitates then jerks, I thawt it was normal since its an electronic throttle, I managed to get around it by turning off tha traction control, it must be a more serious issue now that someone else is experiencing it, its a 2004 by the way
 
Eurythmian said:
OK Guys - My car only has 44,000 miles on it. It's been very well maintained.

I just had all 6 spark plugs and ignition coils replaced at Don Davis FORD-Lincoln-Mercury here in Arlington, Texas. I had them replace all the plugs and four of the coils... I did the last two myself to save a little cash. They gave it a clean bill of health for a grand total over $!,000.00.:mad:

Now the car hesitates under slight acceleration. If I get on it or drive it somewhat more aggressive, it seems to not do it. (I shouldn't have to drive the car hard to keep it running!):mad:

It happens when I slow down to go around a corner-then slightly give it gas. Or when a light changes to green and I don't need to come to a complete stop. When I slightly give it gas, the car hesitates (seems to have no power) and then I hear what sounds like backfiring from under the hood. Like it's in the intake or something. If I let off the gas then punch it, it comes out of it.

Any ideas what is wrong now? :confused:
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Pretty crazy since I was going to post this same issue today minus the backfire part. It only happens to me when I'm turning don't recall it happening when driving straight. It happens almost everyday with me. I'll be at a stop & when I turn onto another street my car completely bogs & hesitates to go & I can't figure it out. If I let off the gas then get back on it the problem usually goes away, but it's EXTREMELY annoying when it happens.

I will be watching this thread closely hoping someone has an answer as to why this happens.
 
DENNISJR60 said:
It only happens to me when I'm turning don't recall it happening when driving straight. It happens almost everyday with me. I'll be at a stop & when I turn onto another street my car completely bogs & hesitates to go & I can't figure it out. If I let off the gas then get back on it the problem usually goes away, but it's EXTREMELY annoying when it happens.
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It has happened to me on straight aways too. I can be in traffic and slightly give it gas and it hesitates and sometimes misfires or backfires. :mad:
 
Have you guys checked the PVC hose and valve.
 
They replaced mine twice under warranty, with in about 18 months.
 
I have an 06 and it does it too. It happens to me in the same place every day. I pull up to a stop sign and dont come to a complete stop and turn right. It hesatates for a second then starts to pick up speed. Any ideas??
 
Eurythmian said:
OK Guys - My car only has 44,000 miles on it. It's been very well maintained.

I just had all 6 spark plugs and ignition coils replaced at Don Davis FORD-Lincoln-Mercury here in Arlington, Texas. I had them replace all the plugs and four of the coils... I did the last two myself to save a little cash. They gave it a clean bill of health for a grand total over $!,000.00.:mad:

Now the car hesitates under slight acceleration. If I get on it or drive it somewhat more aggressive, it seems to not do it. (I shouldn't have to drive the car hard to keep it running!):mad:

It happens when I slow down to go around a corner-then slightly give it gas. Or when a light changes to green and I don't need to come to a complete stop. When I slightly give it gas, the car hesitates (seems to have no power) and then I hear what sounds like backfiring from under the hood. Like it's in the intake or something. If I let off the gas then punch it, it comes out of it.

Any ideas what is wrong now? :confused:
Click to expand...

It sounds, to me, that they did not put something back in correctly. As in, they may have left off a hose or connector.

It almost sounds like your fuel injection is not getting enough pressure when you open the throttle part way.

You could have also had a bad COP installed.

One other possibility is that of sabotage. They may have intentionally done something to get you back in there and take some more of your money.

As far as this being common to other members' cars, this is on a V-6 and should not necessarily directly translate to V-8 symptoms.
 
I kno u'r suppose to keep it simple, BUT could tha trans be of any correlation?
 
Could it be a simple as the timing being off? Because it never did it at all today. Drove like a new car. I'm thinking this is the first day I have had it back out on the highway cruising at 70 mph for close to 1.5 hours before turning the cruise off. Then I exited the highway and drove side streets purposely accelerating slowly round corners and from partial stops. (Normally this would cause it to hesitate and backfire). But it never did it once. Drove beautifully... like a Lincoln should!

So my thinking is this (and I may be way off here so let me know). The two old coils they left on were bad and causing it to misfire. I change them out with two new coils but never disconnected the battery when I did it. So the computer still had the bad timing programed in it. So last night I disconnected the battery for 30 minutes to erase the memory. Now after driving on the highway this morning and again tonight for a total of about 1.5 hours, the timing seems to have has corrected itself.

Of course after I make my appoint at the dealership to have them look at it, I can't get it to do it again!:mad:
 
Eurythmian said:
Could it be a simple as the timing being off? Because it never did it at all today. Drove like a new car. I'm thinking this is the first day I have had it back out on the highway cruising at 70 mph for close to 1.5 hours before turing the cruise off. Then I exited the highway and drove side streets purposely accelerating slowly round corners and from partial stops. (Normally this would cause it to hesitate and backfire). But it never did it once. Drove beautifully... like a Lincoln should!

So my thinking is this (and I may be way off here so let me know). The two old coils they left on were bad and causing it to misfire. I change them out with two new coils but never disconnected the battery when I did it. So the computer still had the bad timing in it. After driving on the highway this morning and again tonight for a total of about 1.5 hours, the timing has corrected itself.

Or do I need to disconnect the battery for 20 to 30 minutes to get this to happen? Let me know. Of course after I make my appoint at the dealership to have them look at it, I can't get it to do it again!:mad:
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sounds like a very plausible idea, because i know when i used to put different octane fuels in it (from being broke) it would take the computer some time to recalibrate the miles to the tank, I kno it's two completely different things but it could very well be. good luck
 
Eurythmian said:
Could it be a simple as the timing being off? Because it never did it at all today. Drove like a new car. I'm thinking this is the first day I have had it back out on the highway cruising at 70 mph for close to 1.5 hours before turing the cruise off. Then I exited the highway and drove side streets purposely accelerating slowly round corners and from partial stops. (Normally this would cause it to hesitate and backfire). But it never did it once. Drove beautifully... like a Lincoln should!

So my thinking is this (and I may be way off here so let me know). The two old coils they left on were bad and causing it to misfire. I change them out with two new coils but never disconnected the battery when I did it. So the computer still had the bad timing in it. After driving on the highway this morning and again tonight for a total of about 1.5 hours, the timing has corrected itself.

Or do I need to disconnect the battery for 20 to 30 minutes to get this to happen? Let me know. Of course after I make my appoint at the dealership to have them look at it, I can't get it to do it again!:mad:
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Very, very unlikely on the timing theory.
 
My second theory is heat. It wasn't as hot today as it has been and I had not sat idling in traffic letting the engine get really hot. I am going to go out and start it and let it sit for a good five to ten minutes then take it out and drive it trying to get it to repeat the symptoms. I will get back to you in a few...
 
Eurythmian said:
My second theory is heat. It wasn't as hot today as it has been and I had not sat idling in traffic letting the engine get really hot. I, I am going to go out and start it and let it sit for a good five to ten minutes then take it out and drive it trying to get it to repeat the symptoms. I will get back to you in a few...
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If that's the case I'm screwed as I live in Vegas...
 
OK - I let the car sit and idle for 10 minutes with everything running - it should have been good and hot. Then went driving in town trying to get the car in the same situations as before when it would hesitate and backfire. I drove it around for 30 minutes without getting it to reproduce the problem.

I'm thinking it may have been the timing... clearing out the computer after installing the new Ignition Coils has definitely improved the way it's performing.

I'm canceling my appointment with the dealership but letting them know I may have it back to them to correct this problem if it pops up again. But for now, I'm thinking it may be solved. I will let you guys know either way. I will post again each day after I get home from work to give report. :cool:
 
Ok reading these later posts it's very hot and humid today and my hesitation problem was more noticeable and I also experienced studering /tugging with light acceleration on straight roads and up hills, you think disconnecting the battery for some time will better the symptoms? before calling the dealership? thanks 04 V-8
 
This was another day without any issues. It got up to 105˚ here in Texas today and I had to site in bumper to bumper rush hour traffic. I was just waiting for it to act up... but it didn't.

Disconnecting the battery and waiting for 30 minutes before reconnecting it seemed to have solved my timing issues. But this was after replacing all the ignition coils and plugs.

After spending over 1,000.00 to have this work done plus what I had done myself, the car continued to hesitate and actually backfired several times. It just seemed like a timing issue at this point... so after thinking if I erased the computers memory it would need to relearn and set the timing. I'm not saying this actually fixed the issue... but it's been 3 days now and a total of 270 miles without any issues. Today and the rest of this week is scheduled to have over 100˚ heat which is grueling on any car. But if I get through it without as much as a hick up, I think it's solved.

I'll be back tomorrow to let you know.:)
 
Eurythmian said:
This was another day without any issues. It got up to 105˚ here in Texas today and I had to site in bumper to bumper rush hour traffic. I was just waiting for it to act up... but it didn't.

Disconnecting the battery and waiting for 30 minutes before reconnecting it seemed to have solved my timing issues. But this was after replacing all the ignition coils and plugs.

After spending over 1,000.00 to have this work done plus what I had done myself, the car continued to hesitate and actually backfired several times. It just seemed like a timing issue at this point... so after thinking if I erased the computers memory it would need to relearn and set the timing. I'm not saying this actually fixed the issue... but it's been 3 days now and a total of 270 miles without any issues. Today and the rest of this week is scheduled to have over 100˚ heat which is grueling on any car. But if I get through it without as much as a hick up, I think it's solved.

I'll be back tomorrow to let you know.:)
Click to expand...


well i have solved a few problems by this too, either letting it idle for about 10 minutes, or driving it for a good hour, highway and city driving to let the computer relearn itself
 
Lincoln Jealous said:
well i have solved a few problems by this too, either letting it idle for about 10 minutes, or driving it for a good hour, highway and city driving to let the computer relearn itself
Click to expand...

Simple - and all you are out is the gas money. I'd rather give this a try over letting the "Stealership" get their hands on it again!
 
Another 102˚ day and drove 93 miles without any issues.
I'm thinking I have the issue is resolved.
 
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