situation: driving along, come up to a stop sign and depress clutch, i am now coasting along, the RPMS drop to about 1000 then to 900, then 800, 700, 500, 300, and boom, it shuts off. i have no clue why. the ONLY resent things i have done is an oil change and a new fuel pump. a friend told me that it backfires right before it shuts off too. any ideas would be great

 

Is your choke closing? Is the replaced fuel pump OEM or aftermarket? Did you touch your idle screw at all? First thing you can do is pull a bottom plug out (leading) and check it for signs of fouling.

 

i'll check the plug, what if is fouled??, the pump is aftermarket, with a cut off switch i installed, i haven't touched to screw in weeks

 

on the screw, is clockwise leaner or richer?

 

If its backfiring...I dont think its your fuel pump.

Its still pretty cold up there, isn't it?

My car will do that until it is properly warmed up....if I dont have the choke out long enough.

I have to replace my thermostat....maybe you do too?

 

could be loose or cracked vacuum line..

 

its not cold anymore, and it ONYL does it once the choke is in, and car is fully warm, checked as much lines as i could, still NO idea

 

check them for cracks and then double check. better yet just replace them all it will eb worht the hasslein the long run..

 

does it do it all the time, mine used to do that every once in a while.. never did figure out why.... It was so sporadic that I didnt bother looking too hard. I would just coast, put it in gear and lightly raiset he clutch to restart it.