Some insight needed from the experts!!

[hunterguy86]

Ive got a few problems with my stock 86 k5 w/ a 305/700r4/208.

1. Engine issues:
When i take off from a dead stop the engine seems to lug a bit. I have a new fuel filter, new plugs, wires, cap and rotor. The plugs are gapped to spec and timing is also to spec according to the sticker under the hood. I have also rebuilt the carb. The engine also has a bit of rough idle. It idles at about 500 RPM at operating temp. Also the choke does not work. It also smells like its running a bit rich. Where should i start looking? Should I just get a new carb?

2. Oil Pressue guage:
The stock oil pressure guage seems to bounce around 30. Do i need to get a new guage?

3. Transfer Case:
sometimes the case doesnt want to go into 4hi from 2wd. If I back up a bit it goes in fine. When i go from 4hi to 2wd it shifts fine but sometimes it doesnt come out of 4wd. If i back up it comes right out. The case is full of fluid. What is causing this?

Sorry this is so long. Thanks in advance for the help.

 

[pauly383]

1. You may need lower gears , or it could still be in the carb . Mine doesn't lug at all , just slower with the a/c on . I used a rebuilt q-jet WITHOUT computer controls .

2. I had that problem , was the gauge itself ( well the resistor on the back ) .

3. Your range fork pads are worn . Left unchecked its gonna eventually only be able to work in 4lo . Drive home won't be so bad if you have highway gears .

 

[dyeager535]

Part of the issue is going to be your idle RPM. Someone can point you to the right idle RPM, but that's too low even for a manual trans. Probably need to adjust your idle mix screws once you get the idle RPM right.

 

[pauly383]

I have mine set at 600 in gear currently . It will idle as low as 500 if I wanted .
Emissions sticker actually shows a low number too .
1986 h code 305
4 degrees at warm idle speed 500 rpm nuetral with auto
4 degrees at warm idle speed 700 rpm manual

 

[hunterguy86]

I went by the emissions sticker when setting timing and idle.

Thanks for the responses and keep em coming.

 

[hunterguy86]

Any ideas about the choke?

 

[pauly383]

Choke should be electric .

Look for power on the choke wire with the ignition on . Then remove the screws holding the coil on and see if it isn't broken or wasn't put in right . Then look for the rod that runs up to the flapper from the choke housing . Also look for binding on the fast idle cam . Since it can't drop until the choke opens .

Its fairly simple . 12 volts heats the coil , it moves the rod , the flapper opens , and on first blip of throttle after warm the fast idle cam drops .

 

[dyeager535]

So if timing and RPM are right, has idle mix been set correctly?

(been covered if you didn't, just search for posts on it)