S/C Marauder Stumbling need help badly!

MMBLUE said:
This has had me thinking on your issue. Think of your problem this way. Expandsion and contraction. When things are cold they shrink, when hot expand. So, I wonder if there is air that is getting in not metered. Either through the pipes, fittings or intake itself. Try this, when car is warm and running at temp, get a can of ether or similar, and spray in different suspect areas to see if idle changes etc. What do you think?
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That’s along the lines of what I was thinking but with the COPS. Heat and electrical resistance. The longer they are “on” the worse the problem gets.

I will certainly try what you suggest, it’s a great idea.
 
Worked on the car again, it still hates me.
So with the thought that I had a Bad COP or two I bought four new ones from Rock Auto (all I can afford). I chose the Motorcraft brand. I swapped out all four on the Driver’s side. Buttoned the car back up and let it run for a while to get it nice and warm. I took the car for a drive and the problem is still there, no change.
So then I got a can of starting fluid and sprayed any place I thought a vacuum leak could be. Idle never changed. I then swapped out the four COP’s on the passenger side. Buttoned the car up again and went for a drive. The problem is still there, absolutely no change.

One more thing I am going to try is changing out the spark plugs. My torque wrench broke when I torqued down the intake, so I am waiting to change the plugs until I can borrow another one.

After the plugs I am out of ideas.

I was so pi$$ed off I forgot to take any new video of what its doing.
 
Hello FF1077, I purchased sanco's marauder I got it home had it for two days and then went out on 4th of July after it ran for about 5 min, got in started driving and bam it started stumbling bad. I took it back home replaced the fuel filter and the sensor on the fuel rail. With no luck I then pulled the tank out to replace the fuel pump and whalah the little rubber hose coming out of the top of the fuel pump was split, sending half the fuel back in the tank. I pulled the hose off replaced it with a new one and used hose clamps to put it back together and haven't had a problem yet. Just something I experienced, hope this helps and I hope you get it fixed soon :beer:
 
One simple thing you may look at, the spark plug insulators. when you pull the plug out, hold it as if it is in the motor, electrode down, and make sure you didn't have an insulator break and slide down to the tip.

I had this happen once, I chased that misfire till I pulled my plugs, found 1 with a broken insulator and when in the installed position, it would slide down, instant mis-fire. So basically, when you pull the plugs, you shouldn't be able to shake them and hear any noise.
 
Charged said:
Hello FF1077, I purchased sanco's marauder I got it home had it for two days and then went out on 4th of July after it ran for about 5 min, got in started driving and bam it started stumbling bad. I took it back home replaced the fuel filter and the sensor on the fuel rail. With no luck I then pulled the tank out to replace the fuel pump and whalah the little rubber hose coming out of the top of the fuel pump was split, sending half the fuel back in the tank. I pulled the hose off replaced it with a new one and used hose clamps to put it back together and haven't had a problem yet. Just something I experienced, hope this helps and I hope you get it fixed soon :beer:
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I thought about this and I think maybe I can rule it out as the problem. According to all the reading Josh took my car is getting all the fuel it needs, even when its cutting out. So if the hose was split and I was losing fuel it would have shown up in the readings as either a decrease in fuel or a increase in the work of the pump.
 
Spectragod said:
One simple thing you may look at, the spark plug insulators. when you pull the plug out, hold it as if it is in the motor, electrode down, and make sure you didn't have an insulator break and slide down to the tip.

I had this happen once, I chased that misfire till I pulled my plugs, found 1 with a broken insulator and when in the installed position, it would slide down, instant mis-fire. So basically, when you pull the plugs, you shouldn't be able to shake them and hear any noise.
Click to expand...

I will probably end up replacing all the plugs just to be safe.
It would be nice if they were the problem.
 
Obviously this won't help you, but ever since a year ago, I can no longer power wash my engine (never once an issue for years prior) or go thru a car wash because of the hood (class glass cowl) or I get the exact same sound as in your video. It's happened twice now, first time in ran so rich my eyes were watering trying my best to limp her home 2 miles. Second time off the charts lean and a real sumbitch to keep running, feathering the gas/WOT, didn't matter, it took years of owning POS's knowledge to keep her running to get back home.

After exhaustive efforts, I flat out gave up. Both times after about three days she would cough up a storm and come to life. I have separately sprayed everything possible countless times with a spray bottle and still can't find the cause.

My only question to you is, what was the moisture/humidity levels when it began to act up compared to when it ran good?

Please chime in when you get this resolved.


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justbob said:
My only question to you is, what was the moisture/humidity levels when it began to act up compared to when it ran good?

Please chime in when you get this resolved.


Sent from my iPhone using Tapatalk
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When It first started it was July and the weather was warm, in the 70's. Thats when I took the Video. It was about the same weather after I replaced the Fuel pump and had the blower repaired. This last time I worked on it, it was raining and in the 50's.
 
In my latest go round with Trilogy 90 I replaced all the plugs with Motorcraft AGSF22C/SP 505 plugs. I let the car idle and warm up for 20 minutes before I took it for a drive. No change, still doing it.
Here is a link to the video I took of it cutting out.

http://youtu.be/57EDKz6auNI

I’m down to the crank and cam sensors left to change.


Any new thoughts or ideas?
 
I had a similar problem back in October with my car. Out of no where my car started Stumbling at right about 60mph so I called Lido up. To make a long story short I took the car to Lido to have him look at it. He told me the car justed needed new spark plugs no big deal. He changed the spark plugs out, but the car still stumbled. Lido then tried several diffrent brand of spark plugs and checked and made some adjusments to the tune, but the car still contiuned to stumble. Lido then said the only other thing he could think it could be is bad COP's. With the car having 84,xxx miles on it I decided to have him replace all of the COP's instead of just the one or ones that he found that were bad. I went this route to insure me that I wouldn't be going thru the same issues months from now with the car. It's been about two months and the car drives better than ever now.
 
Because I hate threads that describe a problem I have and there is never a resolution, I am updating this thread to say problem solved.

Major thanks go to Landy and 03sport007 for taking the time to personally help me with my problem. They both helped me realize that fuel was not the issue thanks to 03sprt007’s data logging. 03sport007 also let me swap out components with his car and that saved me from buying parts that I wouldn’t have needed. Not to mention we were doing it in the pouring rain and we both got soaked!

So the original owner suggested I look at the Cam and Crank sensors as they could be causing the problems I described. That was on my list of things to look into, but it jumped to the top of the list when I read this.

http://forums.corral.net/forums/svt-dohc/1203938-help-97-cobra-breaking-up-5000rpm.html

That is EXACTLY what my car was doing. As soon as I could I swapped out the crank sensor and have enjoyed three glorious weeks of a perfectly running Marauder. I should have followed his advice many months ago!

There was this one REALLY spooky moment though. I was on my way to work about a week ago in stop and go traffic. I was contemplating how it seemed like the problem was fixed, everything was fine and I was so happy. Then I started to get negative and was thinking that with my luck the CEL would come on soon (I have horrible luck) and I would have another problem that needed fixing. Not 5 minutes later the CEL came on. It was two codes (don’t recall what they were) for the left and right rear O2 sensors. I know I had one of them before when my collector gasket was leaking. I cleared the codes and nothing since. (Crosses fingers)
 
Thanks for posting the solution.

Hey maybe it wasn't just bad luck but intuition kicking in during your hiccup. Good news about that? No intuition, no problem!
 
Mary's been having a similar issue with Phoebe. I bought a new CKP sensor but you have to pull the A/C compressor to replace it. Waiting for her to have the HVAC system pumped down to disconnect it.

After reading the link posted by FF1077, I'll try cleaning the CKP connector before going through all the other work.
 
Btw, for anyone ever questiong wether a crank or cam sensor is bad, they are simple coils around pole magnets and if you can measure voltage between .5v and 1v (it will ocillate as you turn the engine over). You need piercing multimeter leads and extreme caution is advised.
 
"Mary's been having a similar issue with Phoebe. I bought a new CKP sensor but you have to pull the A/C compressor to replace it. Waiting for her to have the HVAC system pumped down to disconnect it."

All I had to do was unbolt the compressor and move it a little bit and there was plenty or room.
 
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