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Maybe engine or trans problem!

I have a 2001 GT Mustang Conveter. A/T OD,4.6 L SOHC, it has 141,000.0 mile on it the motor still run like it was new, but I know it run alitter rough sometime,my problem is that when I go to town like about 30-45 mile away, I may go 55-65 mph, when it is warm up! drive it down the road the rpm will drop about 4-6 rpm,for about 5-6 second an go's back up to were it suppose to be, like if I go 60mph, it is run 2,000 rpm, an it will do this every 5-6 mile apart. now to me I don't think it is the trans. cos I think it do it all the time. if this is a sensoer.then I can replae it my self, if I knew which one it is, or should I take it to a ford dealer an have then put it on the machine to find out what it is doing, now the engine& trans. check light does not come on. ok now let say it is the Trans., an it has to be rebuild or replace, an I have add some aftermark to it an it push alitter ove 300hp or more, what kind of trans. would be the best to put in it. James Peters

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  • 133 Answers

Engine problem you can use obd2 scanner to check system first.Make sure it don't get fault codes.

Posted on Jul 26, 2013

Testimonial: "how can I get a code if it doesn't show a check engine light, an as I say before there is no ck engine lght, on motor or trans? read it again!"

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 239 Answers

SOURCE: 99 f250 SD 7.3

Your speed sensor in your trans. needs to be checked out sounds like its not working or not getting a good signal until its generating enough power and speed to start until it reaches 30 MPH. Check that out sometimes it could just be some dirt on it. It all makes sense the ABS light is on because its not reading the speed of the tires, and the AOD light is on because It has no idea when to shift into overdrive without knowing how fast its going. I sure Hope that Helps You Out, And Thanks, Bear001

Posted on Jun 17, 2008

rylee_smith
  • 8619 Answers

SOURCE: 1992 Honda Accord EX 4 cylinder automatic [engine RPM change]

Hi!

It seems to be clutch problem.

There is a way to slightly adjust the idle,on the front of the throttle body where the intake boot is bolted on,abovt the boot and slightly to the left you will see a hole about 1/2 inch wide and it is plugged with grey epoxy like material. Using a flat head screw driver scrape the epoxy out of the hole and there is a flathead adjustment screw. You can adjust the idle up and down just a few hundred rpm. Hope this helps and let me know if there is any more direction you need.
Please rate this solution.

Thanks
Rylee

Posted on Feb 14, 2009

  • 4369 Answers

SOURCE: Overdrive light flashing trans struggles to shift

probably the vehcile speed sensor

Posted on Feb 27, 2009

motor1258
  • 6674 Answers

SOURCE: 2004 subaru forester, 99,000 miles. Check engine

Drop in to an Autozone, or Pep Boys, or similar big parts store & they will usually scan for codes free. This will hopefully eliminate all the guess work, or at least point everyone in right direction for better diagnosis. If not obvious from codes what the problem is, get back to us and we'll help you out.

Posted on Aug 23, 2009

Testimonial: "Thanks for the great suggestion . I'll have Autozone read the codes on Monday. Thanks again!"

jbass706
  • 167 Answers

SOURCE: ck engine light on - no code

Check engine light with no codes usually means a PCM reset is happening. EBP shorting, ICP shorting, aftermarket "performance chip". PIDS need to be monitored to eliminate sensors. IDMs (Injector Driver Modules) can also cause this. IDM's are separate from the PCM/ECM (engine computer).

Posted on Oct 25, 2009

Testimonial: "THANKS! no custom chip- burned valve pasthru conect so will start over from there- now have code-P1280-P1293 Thanks Again- Eric"

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