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My car wouldn't start yesterday and I got a jump start. It's been starting ok but wants to lose power while I'm driving or sometimes speed up on it's own. A few times it died as I slowed, but I was able to start it. A couple of times when it was losing power, the engine check light, oil light and a few others were flickering!
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Disconnecting the battery cable while the vehicle is running is a no no ! The electronic's on your vehicle , you can cause some serious problem's doing that . That was ok on 1960 era vehicles , from 1970 on with all the transistors in the electronic control modules ,you don't want to do that . You may have caused your problem yourself ! http://www.troubleshooters.com/dont_disconnect_battery.htm .Take your vehicle to a qualified repair shop .
I had the same thing happen to my trooper it started losing power I had to cut out the cateyletic converter and when I did it ran perfect but it was very loud but I only drove it to Darryl's Mufflers he put a new one on she ran like a champ it started to plug up or it could be the timing belt slipped a little, jumped a tooth it would still run depends on how many teeth that it jumped the more teeth it jumps the more it will loose power fast and eventually start missing and back firing and start being hard to start or it jumps to far out of time it will not start at all it will just turn over. If it breaks it will turn over fast and not fire at all. Hope this solves your problem its 2 problems that I know will make your trooper lose power and speed if this does not sound like the problem then call Affordable Battery & Auto Care and ask for Jed let him know Jeff referred you to him and he will look it up and help you diagnosis your problem. Call 503-477-9631 he is really good and he is affordable.
He is correct the speed sensor is used by the transmission controller and antilock brake system the engine controller uses this sensor but not for starting purposes
Check your starter solenoid. Sometimes the wires loosen, or the solenoid just goes bad. Check to make sure all wires are firmly attached. Hope this helps.
Have you checked where the power cables connect at the starter, check the condition of the cable, also the condition on the ground cable. If the connections are corroded or the cable has a number of broken strands of wire it can cause the cable to loose conductivity. If in doubt replace them both as they are relatively inexpensive.
Lastly Check the ground cable that connects the engine to the chassis.
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