Whats my baby up to?? - BMW Forum

Danbot · 03-06-2006, 10:55 AM

Well, my car has the hiccups. I dont know what to do. It goes for weeks, with no problem what so ever, and then suddenly, out of the blue, *HICCUP* - like it suddenly loses all power and then all of a sudden its over. Sometimes she dies, then I turn off the power, and then start her back up again, and off I go. Does it at all speeds, all levels of power. Any ideas? Could it be the cone air filter?

Sorry, forgot to mention, the air filter is right next to the block, and it gets disgustingly hot in there, considering for the past few days its been 104 F (40c) lately. Could it be anything to do with the temp of the air going in?

Starmavin · 03-06-2006, 11:35 AM

Difficult to say with out kowing what the car is, but from what you are telling me I would relocate the intake ASAP.

Danbot · 03-07-2006, 11:15 AM

Sorry, its a 325i, 1989 model. Could it be the heat of the air going in?

Morgenster · 03-08-2006, 06:06 AM

What's being cut off?
fuel?
air?
or spark?
The only time I saw something similar in my car was when the fuelpump relay was not tight in its socket.

Danbot · 03-09-2006, 10:10 PM

It seems to be that the spark is getting cut off. Either that, or the fuel, I cant really tell. Which relay is the fuel pump?

Morgenster · 03-10-2006, 06:23 AM

Quote:

Originally Posted by Danbot

It seems to be that the spark is getting cut off. Either that, or the fuel, I cant really tell. Which relay is the fuel pump?

Hard to tell with your model of car. All the relays and fuses are in the engine compartment (usually close to the windshield) and any repair manual will tell you where to find which one.
If it's spark you should check from coil over rotor to sparkplugs. Since it's erratic and not systematic I'd guess it's electrical, so if you've got time you can check it. What I also experienced was a loss of current from the lead to the rotor where the lead connected to the rotor. It was visible when I let the engine run with the dust cap off the rotor. Cleaning it thoroughly did the trick there.

Starmavin · 03-10-2006, 09:36 PM

Check the crank sensor in the front and engine speed sensor in the transmission for bad connections. Start here. Next, check the main relay for failure.