Search results
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Terrible gap
Areas in the rear upper corners of the fenders, pry bar, hammer and block of wood are your friend. Are all the shims out at the rear upper mounting? There shouldn't be any shims where the core support meets the fender but if there's no shims to take out in the rear adding some shims to the...- fast 99
- Post #5
- Forum: Paint and Body
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Help me Tom Cruise.. Fuel or Spark Issue??
Really should have come here before shot gunning the problem. Replacing all those parts it is possible to screw up, making diagnosis harder. Check compression, are the plugs black? Being that rich will dilute oil with gas. Obviously need to get that carb fixed but only after diagnosing engine...- fast 99
- Post #2
- Forum: Tech Discussion
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Stripped fuel filter
Assume the filter in the mid q jet housing? There used to be repair kits. Problem with cross threading is the gasket won't seal. JB or any other sealer won't fix it. Most times either got it threaded straight or tossed the carb.- fast 99
- Post #2
- Forum: Carb Fuel Systems
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Replace spark plugs truck runs but dies when it at idle
If only plugs were touched, check firing order again. 18436572 Did any vacuum hoses fall of?- fast 99
- Post #2
- Forum: Engine & Performance
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"Overheating" --> Now Fuel Delivery Issue --> Dirty Tank?
Emissions back then were not the same between states and GVW changed requirement. Options might change it as well, such as high altitude. I have an 81 K20 LD 3/4 ton with a cat and an 85 K20 HD without a cat, same engines.- fast 99
- Post #26
- Forum: Tech Discussion
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"Overheating" --> Now Fuel Delivery Issue --> Dirty Tank?
Using that analogy on a 2-line system wouldn't a new pump drawing fuel to a lower vacuum cause more vapor lock problems not less? Everything else concur.- fast 99
- Post #17
- Forum: Tech Discussion
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Anyone leave their door springs off on purpose?
Haven't tried leaving them off but I did own a commercial company where SB doors were opened and closed more than anyone would in private use. As long as the hinges were lubed and adjusted properly never had an issue. Later R/V style was another story.- fast 99
- Post #2
- Forum: Paint and Body
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"Overheating" --> Now Fuel Delivery Issue --> Dirty Tank?
Vapor lock more times than not is caused by low fuel pressure. Think of it like a pressure cooker. Boiling point increases with pressure. Today's fuel is not designed for carbs, exacerbating any low fuel pressure issues.- fast 99
- Post #15
- Forum: Tech Discussion
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"Overheating" --> Now Fuel Delivery Issue --> Dirty Tank?
Check fuel pressure AND volume.- fast 99
- Post #7
- Forum: Tech Discussion
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Fire out of top of carb
Drop something into engine, piece of gasket under valve, crossed plug wires, very lean? Does it run smooth for those 5 seconds if not, check vacuum, broken valve spring, ect. Even if there is excessive fuel it will need spark from somewhere. What else [if anything] was touched/done/ moved...- fast 99
- Post #3
- Forum: Carb Fuel Systems
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Pass. Side header gasket.
Header gaskets need to be heat cycled and re-tightened. Once they start leaking exhaust can burn the gasket up. Might be too late but I have had good luck using high temp silicone. Small bead 3/16" let it set for 20-30 minutes before installation. If the header flange is thin or bent a new set...- fast 99
- Post #4
- Forum: Tech Discussion
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Really weird air conditioning problem
First need flush fluid. Disconnect compressor, remove orifice tube. I don't measure the fluid. Just pour a cup or so in condenser and evaporator, using air hose blow it out. Do not use full pressure, especially on evaporator. Put a rag over the other outlet to avoid a mess and check for...- fast 99
- Post #16
- Forum: Tech Discussion
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Vapor lock or something else?
84 would have vapor recovery: charcoal can. To install one need to reference a vacuum diagram and install the missing parts. Some diagrams are available here. Need a pressure gauge, check wherever accessible usually at the carb inlet. 5-6 lbs is decent. Not sure what the GM spec was. Volume...- fast 99
- Post #7
- Forum: Carb Fuel Systems
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Some hesitation and stumble 85 k20
Possibly lean, check fuel pressure and volume, float level, accelerator pump, fuel filter, ect.- fast 99
- Post #2
- Forum: Engine & Performance
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Vapor lock or something else?
If charcoal can is gone that's a problem if not converted correctly. Vented and non-vented caps, return line from pump 2- or 3-line senders. It might be easier to install a charcoal can than pulling tanks and changing the pump. Other than adding the complexity of a few hoses those cans do not...- fast 99
- Post #5
- Forum: Carb Fuel Systems
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How often should the a/c cycle while cruising? (Other vehicles)
Air flow and ambient temps, have a lot to do with pressures. If you want to verify that pour a little cold water on the condenser with gauges hooked up. -
How often should the a/c cycle while cruising? (Other vehicles)
Varies 55 lbs sound a little on the high side, overcharge? -
How often should the a/c cycle while cruising? (Other vehicles)
This is general information not specific to a Liberty. Clutch cycles to prevent condenser freeze up and if refrigerant is low protect the compressor. In order to diagnose it correctly system will need the correct charge. 134A is very sensitive to either over or under charge. After doing that... -
396 with Edelbrock 1406 running issue
Re-starting a cold engine time after time can foul plugs. Pull one or 2 check the condition.- fast 99
- Post #2
- Forum: Engine & Performance
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Brake rubbing sound?
Weak return springs on drum brakes can cause noise. Unless the noise is isolated to either front or rear de-squeak both ends. Clean slides, scuff rotors and lube front brakes.- fast 99
- Post #3
- Forum: Suspension, Steering & Brakes
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What causes cylinder wear like this?
To me it appears improper bore and or hone finish. Could be ring flutter or excessive ring land wear? The good part, does not appear to be using oil by rings. Unless you want to start over and rebuild again bolt the head on. Re-torquing head bolts is a joke. I think manufacturers put that in...- fast 99
- Post #5
- Forum: Tech Discussion
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Car Covers company is a sham dealership, I purchased a Cover for my 86 K10 and used it about two months before it started coming apart.
Have a couple Covercraft covers for inside storage, nice. They do make covers for SB and outside, expensive. Do agree about outside covers doing damage. If in a damp area condensation can get inside cover. Wind may abrade paint on the corners unless cover is tied down really good. However, UV...- fast 99
- Post #4
- Forum: Aftermarket Accessories
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Loss of power and shaking
Applications vairy there could be a port on the manifold itself or may have to find a source on the carb. Running at idle remove lines or vacuum plugs until vacuum is found. May need a T. Depending on engine condition and altitude should be in the area of 18 inches at idle. That will be a good...- fast 99
- Post #5
- Forum: Engine & Performance
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OIL
3000 is rule of thumb. To know actual oil condition at change interval, get an oil analysis done by someone like Blackstone. Results are very revealing in other areas as well.- fast 99
- Post #5
- Forum: Tech Discussion
