1993 240SX Fastback: Starts & Dies - not battery or anything like that

[BarnDog296]

**UPDATE FIXED**Thanx for everyones help, I got it fixed. It turned out that when the belt broke it sliced the wire for the MAF sensor and most of the other sensors attached to it. The wiring wasnt totally sliced however, it mostly tore off their insulation. This caused alot of the wires to be touching bare wires together, causing it to throw all kinds of crazy codes and basically confusing the ECU to mess up the Air:Fuel Ratio. The reason I didnt see it was because it was sliced underneath and the top and sides looked absolutely normal. I just had to get some wire crimpers and rewire the harness (10 min job).

Everyone was really helpful! Thanx!

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I have a 93 KA24DE, A/T, Yellow Top Battery, NGK Plugs and Wires, all new belts and basic mods (intake, exhaust, brakes)

This is the background of what happened:

I was installing rotors and pads in my car on Saturday and found that the nut holding my alternator had come out and the alternator bolt was about 1/2 an inch away from falling off of the car. (I was lucky to have seen it) So, I bolted it back up and noticed that the about to fall out alternator had frayed my new belt some, and it needed to be replaced.

Tuesday I was driving home from work and the belt broke and like shattered into the fan and a few other pulleys in small parts. The car kept running at slow speeds and made it home. I think the yellow top is the reason the car still had enough power to run some.

Wednesday I got home, moved the car to be lifted and put in a new belt onto the alternator. When I started the car though is when it got weird.

This is the Problem:

The Car will now turn over like normal, but die right away. If i put my foot on the gas I can keep it running at like 2K RPM or so, anything over 3K RPM and it sputters bad. The engine is shaking more than normal and as soon as i take my foot off the gas it dies right away.

I am not sure what is up at all, the alternator worked fine on Tuesday and the car will start w/out the alternator belt, but not with it... Any Ideas?

Modified by BarnDog296 at 6:52 AM 6/27/2006
Modified by BarnDog296 at 6:52 AM 6/27/2006

[Adam240sx]

im having the same problem, i can start myne too but if i dont keep my foot on the gas it dies right away.....what is the deal.....i was driving just fine with no problems, didnt hear nothing break.....the only thing was i ran out of gas, walked about 2 miles to my house....got the gas can went to the gas station got some gas....went and put it in my car.....started up just fine.....starting making a weird noise right by my house......so i shut it off...let it sit overnight.....and now this......wtf is the deal? need answers ASAP.....

please help.....Thanks

[Adam240sx]

im not sure what to think, i got a brand new alternator that im bought to put on.....idk if thats the problem.....but im sure hoping somebody on here has some info for US......please respond we need your HELP NICO.

[benemorius]

You're saying that if you take off the alternator belt it runs ok?

[BarnDog296]

It runs ok, but only in first gear, its just a good battery, and thast all its riding on when i do that. and my problem is not like Adams (not being a d!ck Adam, i just dont want our problems confused in this forum) mine will keep running with my foot on the gas. Could this be a voltage regulator problem?

[benemorius]

Skip the asking and go straight to checking the voltage with a multimeter.

It could also be that the alternator is not spinning freely and is bogging the engine down when the belt it on.

[Adam240sx]

its all good , I understand......your right they are two totally different problems......although I still havent figured mine out yet.....and its pouring down rain here now so....

[coupebuddy]

check alt. charge fuse if its popped the car will only run off batteryalso its smart to run a 4ga from alt pos. to the baterry to eliminate any other further occurences