stalling question

[yodabiri]

I have a 65 mustang with an original 200cid engine and 3spd...
the problem is that when it warms up and the gas pedal is slightly depressed (just barely though), the engine hesitates somewhat and then responds. When the gas is slammed the engine responds very quickly and with no hesitation. I am kinda stumped. this happens even on a warmed up engine so i dont know! Maybe it is the ignition system or maybe its the carb..? Does anybody have any experience with this type of problem?

Thanks!

 

[JackFish]

Sounds like the accelerator pump isn't working.
Carb probably needs a rebuild.

 

[pedal2themetal45]

HI
Just to give a second ... I have to agree with Jackfish accelator pump..
tim

 

[Stubby]

It sounds like the accel. pump is a little late. Working but not working soon enough.

 

[CobraSix]

yup...accelerator pump, but if you have the the Autolite 1100 1V carb, this is close to normal operation I've found. Try running some fuel system cleaner to clean out gunk in your carb.

Slade

 

[Anonymous]

Other possible sources are
1--old plug wires-look under the hood at night for any arcing(highly overlooked item)
2--worn ign. parts like points, rotor, plugs and cap etc. (High maintainence items)
3--timing just a little to late
4--Dirty air cleaner
A lot of times we go looking for major problems when a normal maintainence item needs attention. Like all the people who rebuild motorcycle suspensions when a tire needed air(this happens literally 1,000's of times a year across the country)). We have gotten used to maintainence free cars, these cars are not in that genre. Carbs get blamed for a lot more then they are responsible for. Worn ign is most noticeable at low rpm's(lower voltage output unable to overcome higher resistance)and hi rpm's (worn parts can't keep up)

 

[yodabiri]

If it is the accelerator pump which seems to be the consensus, (plus ive addressed all of the things Danwagon mentioned).What do i do to fix the problem? I am a novice and do not have very much experience with carbs! So any suggestions will be welcome!...

Thank You!

 

[JackFish]

Rebuilding a carb involves buying a kit with replacement parts, taking the carb apart and cleaning it and putting it back together according to specifications. Not difficult, but one should take their time and be meticulous about it. The haynes and chiltons manuals, which you can probably get from a library usually have step by step instructions.

Might be a good idea to get another carb like the one you have from the scrapyard or ebay or here, and rebuild that. Worked out well for me for the first one because I lost some parts, broke others.

 

[Anonymous]

Do a visual check of the accel pump. Take off the air cleaner and slowly work the throttle by hand while looking down the carb top. Typically you will see a nice thin stream of gas shoot into the carb throat. Not sure how it will look specific to your carb but on my two bbl there is a shot of raw gas pumped into each barrel.

 

[yodabiri]

I actually have rebuilt the carb with a new rebuild kit and at first there were some problems with it running really rough! but then i changed the scv to the original one and the car started running much more smoothly!
Anyways i am pretty sure i didnt mess up (although thre is still a chance of that) and i did follow the instructions in my Chiltons manual, and also i took pictures before and after and compared so be sure!
So i dont know... I also have fooled around with the timing and the problem still pops up even with more advanced timing...

Thanks again

 

[JackFish]

When I re-assembled my carb the first time I didn't get the linkage for the accelerator pump hooked up correctly inside the carb. Took a little fiddling to get it right. If it's not getting a shot of gas when you hit the throttle that might be something to check.

 

[yodabiri]

I will try and fix it or at the least look if there is a shot of gas coming through when the throttle is engaged.

Thanx!