trainfan1

walt peifer wrote:

> "trainfan1" <lmsearing@usdatanet.net> wrote in message
> news:1sOdnYs5MPRxuwjeRVn-vA@usadatanet.net...
>
>>stang85_5 wrote:
>>
>>>I have a 1985 mustang gt H.O. 4bbl and every time it starts getting warm
>>>it
>>>starts to cut out really bad and wants to die especially when I press on
>>>the gas. I've replaced the fuel pump, plugs and wires, fuel filter, and
>>>cleaned the carb but nothing works. A mechanic at my work said it might
>>>be
>>>the ignition module so i replaced that and it got better for about a week
>>>and then started again. It seems to get worse each time I drive it. Do
>>>you
>>>think the problem is in the wiring to my ignition or is it something
>>>else.
>>>PLEASE HELP!!
>>
>>You've mentioned several carb issues - but not once addressed enrichment.
>>How is the accel. pump & power valve?
>>
>>Rob
>
>
> If the car starts and run fine when cool (had to tell from post) but starts
> to perform poorly when warm to hot, there are several things to check:
> 1)thermal breakdown of original ford coil

Maybe...

> 2)excessive heat from from of motor boiling fuel in metal line at front of
> motor.

Probably not...

> 3)thermostat not opening properly

Doubt it...

> 4) EGR malfunction (bad gaskets or erosion of plate on back of motor)

Doubt it...
>
> the 85 4 bbl cars no the early CFI cars have no computer or brain box. just
> simple duraspark coil and ignition module.

No, they are EEC IV, Duraspark II on the CFI, MCU (EEC II) & Duraspark
II on the carbed.

Some of these vehicles have a hot
> idle compensator ( small module on a vacuum line going to carb) that will
> stick and make and engine run rich (black or gray smoke that makes eyes
> water)
>
> power valve and accelerator pump (small rubber diaphragm in front of carb)
> will cause a stumble when accelerating, but car will run smooth at idle.

Most likely. When the choke comes off during warm up, the problem
appears. Power valve / accelerator pump.
>
> one last thing to check as some states/regions change fuel mixtures as
> cool/cold weather approaches the small viton seal on the float bowl needle
> and seat have been known to break down and either stick and starve the
> engine or disappear and not seal thereby causing a rich condition.

Maybe, probably overlooked the float when he "cleaned" the carb.
Certainly sounds like a starvation issue though.

Rob