Idle Problem

So, last night i painted the jeep.... let it dry overnight, reassembled....took it for a drive, ran ok first mile....then at a stop sign it died....started right back up....every time i stopped it wanted to die unless i put my foot into it....

pulled the carb off, one of the 2 jets were clogged (rochester 2g) and the venturi? for the accelerator pump on one side was clogged....cleaned it sprayed out, reassembled and started it - ran ok...started to stumble then died...now it will not idle at all, to keep it running without my foot on it or hand on the throttle, i have to have it partially choked....I have not put a kit in the carb yet, but i did disassemble and clean every portion of the carb (including soaking for a while in PB blaster, and running a tiny guitar string through any clogged or semi clogged passage)

I checked all the plugs and plug wires (they do need to be replaced, but have been working fine for a little while). Pulled the cap and the points look to be in fine shape - i re-gapped them to .016 started it again..it still will not idle - at all. i do not have a dwell meter to check the dwell, nor a timing light to check the timing, but noted that after cleaning the carb, when running at a higher RPM (to keep it running) it has a bit of a miss - not constant, but intermittint....

I did some searches and one suggestion was to check the voltage off the coil - planning on doing that on friday (when i can purcahse a good meter).

while i was thinking about it - did some searching and i hear alot about people running pertronix...what do you all think? Pertronix vs Points? i'm not a mechanic, although i have done some work over the years, but this project has mostly been a learning experience for me...i have spent more time searching and learning and reading than i have actually turning wrenches on the jeep (thank you ECJ5)...

for the money, time, effort etc... IF you think my problem may be ignition - would you go pertronix over points? If so....anyone have a model number for it??? I know that 1165 is for the delco dizzy..but i have the prestolite...does it make a difference? oh - btw- its a 69 CJ5, with the 225 :v6:

Thanks in advance for your help and opinions!

 

Read that on another thread just now...gonna do that tomorrow...


on pertronix... are there different ones for delco vs prestolite dizzy's?

 

I would check the float in the carb for any pin holes.

On the points, a old farmer showed me a trick about 20 years ago on how to set points.

1.He said to never use anything METAL to set the dwell on new points, you use a " matchbook " cover to set the dwell, or the flip end of the box the points came in.

2.Always, and I mean always carry a back up set of points in your vehicle at all times.

I stick with that and I never have any problems with points ignition systems.


Hope that helps.



Todd

 

Yeah, its a poly float....

 

have you tried adjusting the idle speed up? check the timing?

 

Yes, on the idle speed, it wont stay running until quite high in RPM's. As far as checking the timing - i dont have a light to check it, i am planning on picking one up, but i did check that the dizzy was not loose at all.....

 

So, i emailed Pertronix with all of the details trying to get the right pertronix for the Prestolite dizzy on the :v6:...here is the reply....

 

O.K., here is my 2 cents.

This is a project you have just gotten back on the road, at least that is how it sounds from the above.

I would suspect dirt/debris floating around in the fuel system, do you have a filter at the carb inlet???

 

Yes - both the stone filter at the line connection to the carb, and an inline filter after the fuel pump. I have cleaned the stone filter, and checked the inline - fuel flows freely.

I have yet to re-tear apart the carb and blow air through all passages, but plan on doing that tonight.

Tomorrow i am going to buy new plugs, plug wires, a new condenser for the points and a dwell meter. I am also planning on purchasing a carb kit and installing a new kit on it, as well as doing a full detailed cleaning....

 

ALright..... here is the update for tonite...

Blew air through idle mix screws...no change.....

noticed near "kink" in fuel supply line...cut/flanged new line.... fired up - idled...for about 5 mins.... then died...again.

Pulled fuelfilter and replaced.... installed...idled...then died again....

pulled carb, cleaned and blew air through all passages. started re-assembly....noticed a large amount of movement in my float....pulled out the trusty manual....found out the float was roughly 1/2" too much movement....corrected to the FSM @ 1-7/32's drop....reassembled and cranked....fire and idle..... idled for a good couple mins, took for a spin, stopping at several stop signs.....no problemo.... so i think that i may have the issue solved! YAY!

In looking back at what it was doing....i think that the engine was starving out - the float was not allowing the bowl to fill up enough to run steady at idle....the jeep would go through all of the fuel in the bowl, right when the valve would open to allow it to refill - thus starving the engine out....

 

(sniff) i love a happy ending!