Topic: CARB TUNING....

[acerbis]

My 87 22r has white plugs....i've cleaned the carb, blocked the egr, new plugs and wires, and adjusted the valve clearance.  Should I go to a richer main jet? It seems slow to rev also?? any thoughts?

[Rubijon]

GOT PROPANE??

[79coyotefrg]

drill out  the  plug on the mixture screw  and adjust

[acerbis [OP]]

whats the propane method??
Is it common to change the factor settings without mods?
166,000 miles.

[RN37DD]

2x drill out the idle plug and ajust it out a few.

[acerbis [OP]]

i'm down to adjust my carb this way I just want to be sure i'm not covering up another problem....an air leak would be something else correct??

how do i use propane to identify an air leak??

[Fearofrunner]

I think running raw propane over your hoses and if you have a vacuum leak it'll pull the propane in and cause the engine to rev a few RPM's???

[acerbis [OP]]

sweet....thanks

[RN37DD]

you can do the same thing with wd-40 and it's not so explosive.    i wouldn't use propane. my 

[Fearofrunner]

i'm down to adjust my carb this way I just want to be sure i'm not covering up another problem....an air leak would be something else correct??

how do i use propane to identify an air leak??

I think what he ment by got propane was switch your truck over to it then you dont have to worry about carb tunning

[Rubijon]

No you don't understand get rid of the crab and run propane for your fuel source. gotpropane.com it will solve all your problems

[acerbis [OP]]

really, I've heard of propane before but never followed up on it. I don't think its too dangerous??? I'll do a little more research

[*ROKTOY*]

My 87 22r has white plugs....i've cleaned the carb, blocked the egr, new plugs and wires, and adjusted the valve clearance.  Should I go to a richer main jet? It seems slow to rev also?? any thoughts?

Yes, I would try a richer main jet.

[TheCookieMonster]

have you checked out your timing.....advance on your distributor?

[acerbis [OP]]

thats a good point. does the manual tell me how to check it??

[84pickup]

yes

[RN37DD]

yes.. I'm running mine a 8 degrees BTDC with the vacuum lines plugged. 900rpm. yours may be different. and when you hook up the vacuum lines your timing should advance. if  not it's broke or hooked up wrong.

[TheCookieMonster]

you dont want any advance at an idle with the vacuum advance line unhooked. 8 degrees BTDC is the correct setting i believe. if you have a timing light just unhook the vacuum advance line, plug it, and make sure, with that line unhooked, that the timing mark doesnt move when you rev the motor...when you have that hose hooked up the mark should move in a steady matter when you rev the motor...that shows that the mechanical advance is "working"..if its advancing to the right setting im not sure about. you need a distributor tester for that
there are some more things to try

[TheCookieMonster]

it also could be to lean of a fuel mixture