benzinoben

Okay, now I finally get my car back from the tranny transplant and now last night I was coming home from clubbin and went accross a dip in the highway where they have thinned the road out to lay down new tar. Well, of course my car drops in to the low section of the road hard. The was the hardest I have heard my suspension bottom out. Here is the strange part, the engine cuts off at 70mph. All the lights are working but engine will not crank over. I had enough speed to coast it on to an off ramp and down the street a bit. It was strange. I turned the key to the off position and then tried to crank her up and she started.

To add more, now since last night, I crank the key and nothing. I have to hold it in the cranked position and then the car fires up (almost 2 minutes). This is getting strange. Oh ya, it was very hot today about 103. As soon as I got into an area where it was much cooler, the car has started everytime. Might have nothing to do with it, but thought I would add that information in. As far as the total shut off at highway speeds last night it was a cool night about 74 or so..

1. Has anyone had this happen to them?

3199cc

possibly electronic gremlins? Try disconnecting the battery let fault codes clear out and see what the deal is. Can't hurt to try before you drop loot fixing it again.

benzinoben

I think it may be the gear positioning sensor. Damn another "gear" issue

benzinoben

UPDATE....

This gets even more interesting....found out that my battery was at a whopping 7.4v. Infact when in a heated situation it actually dropped down to 6.8v. Not a good idea I am thinking. So I changed out the battery and so far so good....crossing my fingers...

Nasir4dot6

Hopefully it is just the battery. Doesn't sound like an alternator issue based on what you explained. I Know all about Gremlins having a Range. With the Electric Gremlins Its hard to tell. Have you tried cutting it off and restarting it quickly?? Then again, If its running now properly leave it alone. Good Luck

jdouk69

It could possibly be the alternator. Having a new battery and every thing works great, but wait a few days and if it does it again it could well be the alternator. The best way to check that is to run the car and disconect the battery with the engine running. If the car stalls the alternator is junk if it still runs your ok. Try it its worth a peace of mind.

E55AMG99

Oh man, I can't believe you! NEVER disconnect the battery while the engine is running. The proper test for an alternator is to put a VOLTMETER across the battery terminals. A fully charged battery will register about 12.5 volts. When the engine is running, the alternator will increase this by about 2 volts. You might need to raise the RPM off idle slightly to see a big difference.

Start here for a quick primer on alternators. http://www.asashop.org/autoinc/april2005/collision.cfm

Man, the Internet makes everyone an expert

E55AMG99

Crank sensor?