'97, intermittent stalling, MAP sensor code

[dkellyu]

Originally Posted by jerryls

That's great that the MAF sensor fixed the problem. I see it was a code that came up in your original post. I think maybe the EGR valve caused the rough idling and the MAF sensor the stalling, but either way i'm glad to hear it solved the problems. I have to now find a MAF sensor that is inexpensive, maybe from a junk dealer, The MAF sensors on line are $120 or so. I imagine the same one is used on multiple GM vehicles? Does anyone know? My 94 has over 170K miles and is not worth putting a lot of money into it.

I paid $160 something for an after-market valve at Advance Auto, plus the $70... core? charge that was refunded when we brought the old one in.

[jerryls]

Originally Posted by jerryls

Thanks HotZ28- I'll see if I can find one

I found one in a local junk yard from a Pontiac for $25.00. Same part # . I think it solved the stalling problem while driving. I say "thnk" because the car did stall once while idling since I put it in two days ago. I can live with that. The stalling while driving down the street or highway was outright dangerous. That hasn't happened since I changed the sensor.
Thanks for the tip on the MAF sensor, it saved me quite a bit of money and aggrevation.
PS- i also saw one on ebay for $22+$11 shpping.

[Rgory]

Well if only I had a dollar for every Leabre stalling post I found so far. It is excellent because there is a wealth of information, however it is difficult because there is so many posts. I thought I would tag on here because I am having a similar problem as described here.

I have a 98 Buick Lesabre. It has 157,000 miles on it. Last week I had a mechanic buddy install a used motor to replace the original one that blew up. He is an ASE mechanic and did a great job the used motor had 90,000 on it I think but good compression and such. The motor runs excellent except- wait for it-... it stalls randomly. It will stall and die when either the brake is applied or while coasting down the street, hasnt happened while on the gas. When the engine stalls/dies the tach will bounce between 500/1000 in that range and almost matched to it will be the oil pressure bouncing in the same motions or amount. Neutral/Park turn the key and your back along the way.

I have read as many posts as I could but I really dont know, and this mechanic did me a favor, so if I could start to get an idea or try some things myself I may save him some grief. Some important info would be we replaced the fuel filter when changing the motor. The Throttle body was transfered from the old motor, and the oil filter housing was transfered. I havent had to wait for it to "cool down" as it always starts almost imeadiately. The throttle body and components were cleaned when transfered over, and the only other thing I can say is that the oil had a long shelf life? Sealed in the containor but several years old. This problem will usually happen once the vehicle is driven for a while (warmed up) which seems like it would be the crank or cam sensor? But it always restarts.

I also threw a code for lean in bank one P1071 I think? I do not know if that would cause my issues but I have a 02 sensor waiting to go in tomorrow. Thanks guys I know this is really vague and the problems are abundant just curious if anyone knows what stalling and dropping oil pressure would be. And no it isnt the gauge dying you see the oil pressure fluctuate and then it drops or some times recovers.


Ryan

[jerryls]

In my case the MAF sensor caused the stalling while coasting, but it's on the throttle body, so you are using your old one. Could of course be intermittent connections, since they were all disturbed by changing engine. My suggestions would be to change or test sensors starting with the lower cost parts and the easy to get at parts.

[Rgory]

Thanks Jerryls,

I believe I read on here that you can ohm out the sensor to see if it is good or bad? I ask because the replacement engine did not have a mass air flow sensor. It has one of just about every other part just not that one.