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  #16 (permalink)  
Old 09-09-2005, 06:12 PM
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I got the grease for the module from the parts store and put it all back together. I also checked the plugs and they had a lot of carbon on them. I cleaned them up and put them back in to see if there was any noticeable difference. The car still misses but after I turned up the idle enough so it would run on its own (So I could check thigs out)the idle was noticeably better. The car revs a lot smoother too. I then checked the plus and they are all carboned up again. I can also hear it missing on the left bank through the exhaust. The exhaust has a raw fuel smell. The car ran fine after the trans swap. It just started acting up a couple weeks ago. The car is a 85 Monte Carlo with a TH250.

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  #17 (permalink)  
Old 09-09-2005, 06:20 PM
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I think that I would try new plugs.......what plugs do you have in it?

Maybe you want a hotter plug.
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Old 09-10-2005, 04:53 AM
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induction system

Doc here ,

Q~jet or TBI or TPI fuel infection..?(<---miss spell but I like it so it stays..) I thinkin' Q~jet?

If so, Clean the carb with spray carb cleaner, inside and out, spray all the ports , nooks and cranny's that you can get to....use 2 or even 3 cans if necessary, soak it good on the car, let it dry, ...then adjust the idle jets..

Warm the car, make sure the choke is wide open, set idle 750 man 950 auto, and CAREFULLY turn the Idle screws in until the engine stumbles and dies..

back it out 6, 1/2 turns (easier to count) or 3 full turns and re start, do the same on the other side..

DO NOT BOTTOM either of these out!!
They are brass and will scar and will then no longer be useful at all..

Restart and working SLOWLY, chose a jet, and turn it in about 1/8 of a turn at a time until you get the highest idle, wait about 5 to 10 seconds for the engine to normalize before turning again , If you don't you'll adjust right through the "Sweet Spot"..

Do the same for the other side...

Now,..SLOWLY using small turns , and waiting 10 to 30 seconds between adjustments..work between the two first right then left, your going for Highest idle, no random stumble or "Pop'

When you feel you have maximized the adjustments, go to the rear...what do you smell? SHOULD be nothing if you did it right...

If the idle jets have No effect when you turn them in..think new carb or rebuild this one, as this one is at runout...

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  #19 (permalink)  
Old 09-10-2005, 02:28 PM
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The carb I have is an Edelbrock Performer 600cfm. I have ACDelco plugs but I don't know what the number is off hand. The plugs I bought were for a 72 chevy pickup (got from the casting numbers). I just rebuilt it and the car was running OK after the rebuild. To make the mixture screws bottom out wouldn't you have to really crank them down tight. I put mine in all the way just until it got snug. I'll try new plugs and adjusting the carb. I'll get back to you on it. I'll like the detailed write up on adjusting the carb.
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Old 09-13-2005, 01:27 PM
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I adjusted the carb and it idles a lot smoother and the car is actually driveable . I'm going to change the plugs and hope the slight miss and popping from the pass side exhaust stops. I have ACdelco R44T plugs. What should I get for a hotter plug? I'm also running 76cc heads and about 9:1 compression.
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