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  #1  
Old 06-08-2010, 12:56 AM
Hinderburger Hinderburger is offline
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Default 302 starts then dies need help!!

Hi guys
doing a conversion in my 90 ranger with a 78 302. problem im having is starts right up runs for 10 or so sec then dies. then starts right back up does the same. pumping the gas to try to keep it running seems to have no effect on it either. any ideas? thanks
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  #2  
Old 06-08-2010, 08:04 AM
Yrac Yrac is offline
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Default Re: 302 starts then dies need help!!

Sounds like you're runnin' out of the float bowl. Fuel pump problem, perhaps.
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  #3  
Old 06-08-2010, 10:48 AM
Hinderburger Hinderburger is offline
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Default Re: 302 starts then dies need help!!

i took off the fuel line started up 3 or 4 times does the same. starts and dies and i put the fuel line in a bucket when i did that and its gushing out fuel so i think the pump is working.
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  #4  
Old 06-08-2010, 11:39 AM
More_Cowbell More_Cowbell is offline
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Default Re: 302 starts then dies need help!!

how long has the carb been sitting? it may need a rebuild, my dads truck would do that then he rebuilt his holley and it ran like a champ
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1990 Ranger Extended Cab
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  #5  
Old 06-08-2010, 02:02 PM
Radarmy088 Radarmy088 is offline
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Default Re: 302 starts then dies need help!!

i would mess with the timing. try and start it with the distributer snug and turn it slightly and see if it stays on
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  #6  
Old 06-08-2010, 02:39 PM
Hinderburger Hinderburger is offline
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Default Re: 302 starts then dies need help!!

the carb is brand new but it has been sitting on the engine for a while.. i took it apart today and looks like everything is still clean and nothing corroding. i checked the fuel pressure its at 6.5 so fuel pump is good. i know the timing is off but even if thats off wouldnt it keep running just horribly. seems like a electrical problem or something. something telling it to shut off. it runs the same amount everytime.
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  #7  
Old 06-08-2010, 02:45 PM
Radarmy088 Radarmy088 is offline
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Default Re: 302 starts then dies need help!!

try the timing bro. if the timing is off i may start everytime but fall on its face and turn off. if it starts then you getting fuel and spark. take off the dist. cap and check the rotor and the points for buildup. check the ohms in the plug wires to see iif they are all the same an not "ofl" then check the sparkplug gaps.
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  #8  
Old 06-08-2010, 08:35 PM
Hinderburger Hinderburger is offline
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Default Re: 302 starts then dies need help!!

mmm i will try that out let you know what i find out. not sure how to check the ohms in the plug wires. can ya clue me in how? thanks
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  #9  
Old 06-08-2010, 09:12 PM
Radarmy088 Radarmy088 is offline
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Default Re: 302 starts then dies need help!!

use your dmm and change the setting to ohms or the horseshoe one. take off each wire and put the points to each end. if its ofl then theres an open circuit and that can cause a misfire
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  #10  
Old 06-08-2010, 09:41 PM
Hinderburger Hinderburger is offline
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Default Re: 302 starts then dies need help!!

alright sweet ill try it out. not sure why there would be any bad ones. the motor is totally rebuilt with everything new just been sitting for couple years. ill check them out though
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  #11  
Old 06-10-2010, 01:16 PM
Hinderburger Hinderburger is offline
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Default Re: 302 starts then dies need help!!

so i checked the plug wires they all seem to read different numbers. not sure what that means. played around with the timing got it to where it runs best for the 5 sec it does.
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  #12  
Old 06-12-2010, 09:53 PM
nitro nitro is offline
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Default Re: 302 starts then dies need help!!

Which firing order are you using?
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  #13  
Old 06-13-2010, 12:12 AM
Hinderburger Hinderburger is offline
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Default Re: 302 starts then dies need help!!

Got it figured out.. replaced the ignition module and switched out a wire. runs like a raped ape.. thanks all
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