Browning Posted September 15, 2007 Report Share Posted September 15, 2007 Assuming timing is 100% dead on. Shut the car off and it will try to stay running, but it doesn't do it all the time. I've been shutting it off in gear and even then sometimes it doesn't work. Seems as if it's spitting a little gas out of the choke when shut off. Car runs good though when driving, that's what has me thrown off. It's been timed many times so I've ruled that out for now, thinking it has to be the carb? Possibly the choke? 1986 Pontiac Grand Prix. It's got the computer controlled rochester carb with electric choke One of these pieces of shits http://www.i-5automotive.com/p5images/4395.jpg If it is the carb, are these hard to rebuild by chance? Any of you have a decent one laying around for cheap? Quote Link to comment Share on other sites More sharing options...
Chadz89GTA Posted September 15, 2007 Report Share Posted September 15, 2007 My TA did that when I had the fuel pump still running, make sure if its an electric fuel pump to have it come on when the keys turned on etc. If thats not the problem, the carb prolly needs rebuilt. Quote Link to comment Share on other sites More sharing options...
Browning Posted September 15, 2007 Author Report Share Posted September 15, 2007 Fuel pump is mechanical(just replaced it a month ago) but, it does have some sort of primer or something you can hear it clicking for about 15 seconds when the key is first turned Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted September 16, 2007 Report Share Posted September 16, 2007 we can rebuild that carb for you..and modifiey if needed.they are bad about dumoing fuel from a certain area inside..we mod them so they dont do it anymore! and yes it is suppose to click like that! Quote Link to comment Share on other sites More sharing options...
Browning Posted September 24, 2007 Author Report Share Posted September 24, 2007 I'm either going to attempt it myself or just get another from the local yard Is this all I would need? http://www.partsamerica.com/ProductDetail.aspx?MfrCode=GPS&MfrPartNumber=96519A&PartType=428&PTSet=A cliffs on this "mod" you're talking about? Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted September 24, 2007 Report Share Posted September 24, 2007 call the shop and talk too mike about it... he fills something in with epoxy! I dont do quadrajunks...he does. i just do holleys Quote Link to comment Share on other sites More sharing options...
Browning Posted September 24, 2007 Author Report Share Posted September 24, 2007 he must be filling the casting plugs Quote Link to comment Share on other sites More sharing options...
Clifford Automotive Posted September 26, 2007 Report Share Posted September 26, 2007 Dont spend the time of money rebuilding the carb. Get a new one. Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted September 26, 2007 Report Share Posted September 26, 2007 leaky needle valve inside the float bowl will do that you could rebuild it yourself but you need a clean flat surface and lots of room to spread out small parts the rubuild kit comes with directions and a good exploded view of the carb Quote Link to comment Share on other sites More sharing options...
Browning Posted September 26, 2007 Author Report Share Posted September 26, 2007 Dont spend the time of money rebuilding the carb. Get a new one. No can do at the moment. Looks like a used one froma yard will have to work Quote Link to comment Share on other sites More sharing options...
fattyona12 Posted September 26, 2007 Report Share Posted September 26, 2007 even if the carb is dumping fuel it shouldnt run if there is no spark. sounds like a ground or ignition issue to me....my 2 cents. Quote Link to comment Share on other sites More sharing options...
Browning Posted September 26, 2007 Author Report Share Posted September 26, 2007 even if the carb is dumping fuel it shouldnt run if there is no spark. sounds like a ground or ignition issue to me....my 2 cents. bad ground or ignition will cause it to do diesel(I guess is the term?)? How would I go about checking this? I made a post on another forum and got this back as the first and only reply: "When the engine is warm, the choke butterfly should be straight up & down. If it is at any kind of angle, something is wrong. If the choke thermostat (the round black plastic piece on the passenger side of the carb) is not operating properly, such as not getting the 12 volts it needs to warm up and release the choke, or has gotten weak over time (it happens with all the heat cycles), then not only will the choke butterfly not open completely, but the high idle cam will not disengage properly, which will lead to run-on. However, if this is the case, your engine is not idling fine - it's idling too fast. Look at those things, and also let us know what your warmed-up idle RPMs are." Quote Link to comment Share on other sites More sharing options...
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