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#1 |
1970 K10, 350, 4spd!
Join Date: Jun 2004
Location: Shawnee, Ok
Posts: 128
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HOT! Start Problem
I have a stock (1970) 350 no mods.
Before anyone tells me I need to do a search for my answer, I already tried. Must posts were about a carb that is hard to start when cold. Also several about needing a spacer inbetween carb/intake so that gas does not boil over. In either case, I dont think my truck carb problem fits into any of the other posts. Granted I dont know the boiling point of gas? Simptoms: 1.) The truck starts easier in colder temperatures i.e. <80 Degrees a.) When started "cold", I turn ignition, give half a pedal tap, it starts & runs rough, untill what looks to be "flooded smoke" from tail pipe goes away aprox 5 mins. During this time I might tap the gas pedal a couple of times to adjust engine rev. b.)Once the engine is warmed up it idles and runs fine. I can kill the truck and restart with ease. Almost always smell gas during initial start. 2.) The truck either refuses too or starts hard in hot temp i.e. 90+ Degrees a.) Hot truck temp can be reached either by driving the truck (started cold), turning off and leaving it for 30mins - 1hr or trying to start it during the day (Summer Oklahoma 95-115 Degrees) so block/carb are already "HOT" in this scenario I cannot get the truck started. b.) Doesnt matter what I try, doesnt matter if I havent started the truck in 1 hr or 1 week, if the block/carb is hot 90+ degrees it wont stay running. It might turn over and initially attempt to come to life but it feels like gas chokes it out almost as soon as its started. c.) When the truck is hot I have learned to just give up on getting it started or I will drain the battery... because it will just turn over and over without ever restarting. Conclusion: I strongly believe my truck is flooding itself wether I step on the gas peddle or not. It smells of gas every time its started (cold), it smells of gas if it wont start (hot). I havent advanced the timing, the timing cap, wires and plugs are new. My truck only gets 1,000 miles a year and doenst get driven a heck of a lot. The truck has 72k original miles on it so I guess things could go bad just from idle sitting around. I checked compression last year all cylinders were 140-160. Im pretty green when it comes to troubleshooting a vehicle, any suggestions or help would be greatly appreciated. Thanks! |
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