Help! Hard starting and stalling - 1992 Bonne
 

Hi! New to this forum - getting very frustrated with '92 Bonneville SE (130,000 miles). Bought 3 months ago, but this problem just began about a week ago. This happens intermittently, but you can pretty much count on it happening at least once a day. It will crank and crank, but not start, regardless of the temperature (weather or engine). Usually, if you let it sit for about 5-10 minutes (once in a while takes longer), it will then start right up. Also, a few times it has stalled while sitting and idling for a few minutes (have not had it stall while driving YET, thank goodness!). After this happens, it either won't start back up (still cranks), or it will start up and conk out again in 2 or 3 minutes. I am not a novice to working on cars, been doing it for years, but this has got me stumped! Here is what I have tried so far, but the problem still persists!

1. Replaced ICM.
2. Replaced oil pressure switch.
3. Replaced one bad coil (resistance was way off from other two).
4. Cleaned ground busses (both sides).
5. Cleaned crank pos. sensor and wire connector.
6. Cleaned (with alcohol) key chip and electrodes in ignition switch.

And, oh yes, I have checked for codes. The first few days it wouldn't show any at all. Now, just today, it finally showed a 58.

Anyway, this is getting very frustrating :cry: :x . Any and all help you can give me would be GREATLY appreciated :D !

fuel pressure regulator.

How do the spark plugs look? Intermittent problems can be a real pain to track down. Next time it happens you need to be prepared to check for fuel, spark & injector pulse.

One more thing I thought of. I remember reading here somewhere that if the tachometer does NOT move while this is happening (crank but no start), it would point to an ignition problem, and not fuel ... am I understanding this correctly? My tachometer does NOT move when this happens ... but I've been watching it closely, and it DOES move when the car starts as it should.

Could be a bad crank sensor.

I'm a novice with cars but I figured I might throw something out there.. It's not the fuel pump is it? My car was doing something similar, but not exactly like that, and it ended up being my fuel pump was going bad.. Like I said though.. I'm just throwing out some ideas.. Maybe I'm way off. I don't know. Lol.