sj_rx7nut

I'm just learning to work on my '91 vert, I have the FSM and completed replacement of spark plugs and radiator with no problems.

I'm having idling problems pulsing 1200-1500 and it is stalling when warmed up. It is hard to start after it stalls, almost like it is getting to much fuel and floods it. I let it sit for about 15-20 mins, then it restarts fine.

I have read hundreds of threads about this and the top three causes seem to be: Vac leak, o2 sensor and BAC.

The car has 72k on it, so I want to start with the o2 sensor, which should have been replaced at 60k, it is also only a $18 part.

I can see it, I just can't get a wrench or socket on it to get it out.

Any tips or help would be appreciated

Thanks in advance.

Rxmfn7

iTrader: (4)

You need an O2 sensor socket. Any parts store should sell them for like ~$20.

SpeedFreak03

Im not sure how to get to the O2 sensor, but when it floods, hold down the gas pedal ALL the way and start the car. This will start the car like normal, but the fuel pump wont run. This will allow the engine to burn all the fuel that is flooded and in the lines. Also do an oil change (easier then plugs ) after it floods as gas can mix with the oil. Also check out this page to clean your BAC valve: http://www.1300cc.com/howto/how2/bac.htm but I don't think the BAC valve has anything to do with engine flooding. Good luck!

sj_rx7nut

thanks for the help, I will get the socket. Anything else tricky about FSM says just replace it.

Rxmfn7

iTrader: (4)

Chances are that it is going to be very tight, just to warn you. I always find it easiest to use a very long extension, (maybe 2') so that the ratchet is up out of the engine bay and you can get some good leverage on it. When you put it back in, coat the threads with anti-sieze. Also with a univeral O2 sensor, you will need to splice the wires. I always like to solder them, then coat with shrink tubing, but butt connectors will work also. Still you will want to seal it up with shrink tubing.

andrew lohaus

no no no. you do not need a special socket. a crescent wrench will work just fine, just be carefull not to twist the wires too much. save that money for something you'll actually put to good use and need.

Rxmfn7

iTrader: (4)

I find that a proper tool is well worth the money, just my opinion.

SpeedFreak03

Yes I used to not buy/use the right tools (too cheap ) but then I figured out why nothing went like the how-tos and manuals said! So tools are worth the money.

Dan H

I think its a 21-22mm if it matters. I could be wrong though.

x2delight

i just went to my local Autozone and rented the tool kit.. it has all the sizes needed for all o2 sensors... cost me 15.00 deposit which you get back upon returning the tool... **** which reminds me.. i own a set of o2 sensor sockets now.. damnit i didnt return em..

sj_rx7nut

Thanks for all the help, what are the chances replacing the o2 sensor will help my stalling problem ?

andrew lohaus

good point. if you can rent it for free than by all means rent it. it just seems silly to me to buy a special $20 socket to use once on what boils down to be just another bolt like anyhting else.