86 5kcstq 5-speed

[Doyt W. Echelberger]

At 08:47 PM 2/6/2005 +0000, keithd80 at hotmail.com wrote:
>Hi Listers,
>
>I have bought a 86 5kcstq and have replaced fuel filter, air filter and 
>the fuel pump relay. My problem is that when I coast up to a stop the car 
>will sometimes die on me. Not always just on occasion. .....

 >>>>>>>>>>.
OK, for starters I'd do the following:

Because you were messing around on the passenger side of the engine 
compartment, I'd look at the hoses and wiring in that area, to discover 
anything that got bumped, broken, dislocated or disconnected.

I'd carefully inspect all the vacuum hoses, especially in that area, and 
really touch and pinch them to find out if the rubber is soft and mushy or 
hard and crumbly. Wiggle all the connection points. Test the clamps. I'd 
expect the crankcase breather tube to have a leak, a few inches above where 
it connects to the crankcase fitting. And that same tube may be leaking at 
the other end, where it connects to the other vacuum lines at the top of 
the engine. Check that whole nest of vacuum tubes around the ISV.

Remove your windshield washer fluid tank and look for the wastegate. Tug 
and pull at the vacuum lines that run between the wastegate and the 
wastegate frequency valve up on the fire wall. Do the same with the short 
heavy hose that runs between the under side of the wastegate and the intake 
manifold. It crumbles and leaks from the heat of the exhaust manifold nearby.

Check the smaller diameter hose that runs to the lower front underside of 
the throttle valve area of the intake manifold.....even difficult to see 
without a strong flashlight. Sometimes it gets disconnected at the manifold 
end.

And, take off the Michelin Man hose between the intake manifold and the 
intercooler, and flex it and pinch it between the bulges, looking for defects.

Make sure the wires are firmly attached to the air temperature sensor at 
the upper edge of the intercooler. Sometimes they get knocked loose.

After warming the engine by some driving, turn the engine off, disconnect 
the electrical pigtail for the Idle Stabilization Valve and then start up 
again and see what effect the disconnection of the ISV has on how the 
engine runs.

Since this problem involves idle, maybe you should replace the switch that 
controls idle and wide-open throttle. It has a history of going bad from 
microfractures of the solder points inside it. All of them go bad, eventually.

See what you find out, and stay with it until the integrity of all the 
vacuum lines has been verified.

Doyt