Skip the auto shop - Our mechanics make house calls

Q: Turns over really slow then fires up and starts and around 70 MPh rpms jump up and it shifts into an almost 1/2 neutral 1/2 drive

asked by on

out of nowhere it started turning over really slowly it would stay running. At 70 MPH rpms go up and shifts in to like 1/2 neutral 1/2 drive gear. Also noticed a little ground wire that goes to battery was smoke while starting it

My car has 220000 miles.
My car has an automatic transmission.

A: From what you describe it would appear th...


From what you describe it would appear that your vehicle is experiencing more than one issue. In regards to your starting issue, slow cranking is usually caused by a bad battery or starter. I would start by testing the battery to make sure it's holding a charge and has enough cranking power to start the vehicle. If the battery is good I would move on to checking the starter, which may require that it be removed. A smoking wire is usually caused by a loose ground, or an old wire that can no longer handle the amount of current that is being pulled through it. I would look at the ground wire in question to make sure that it's properly secured, and does not shows any signs of corrosion or damage to the wire. Your high speed performance issue can be caused by many things. It sounds like the issue could be transmission or engine related. It may be possible that the engine is misfiring or that the transmission is slipping, under heavy load. If the Check Engine Light is on I would start by pulling the trouble codes to see if they may shed some light on the issue. If there is no light, I would start by trying to determine if the issue is engine or transmission related.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Coolant leaking into cylinders

Hi. As coolant is burned through the combustion chamber, it travels through the exhaust which can damage your catalytic converter. This will lead to the clogging of your exhaust and can cause different problems with your vehicle. If you need...

Q: Problem with car windows

Hi there. More than likely, the problem is with the window motor or window regulator. When you push the window switch, power flows to a the corresponding window motor. The motor then raises/lowers the regulator, which is a scissor-type lift...

Q: After fuel pump replacement, no power getting to fuel pump - 1991 Toyota Supra Automatic

I would start with clearing the security issue, because utilizing the wrong key (or a bad door sensor) can disable the fuel injection and fuel pump once the security system arms, as your mechanic notes. Once the security system is...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.