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1977 mustang II cobra new 302 wont start. the engine ...

Sent to Car Experts December 06 09:53 AM

1977 mustang II cobra new 302 wont start. the engine sputters as it turns over and then occasionally backfires
any suggestions?

Optional Information:
Pre-1980 Ford Mustang II 302

Already Tried:
adjusting the distributor new plugs and wires new carb was installed the engine turns over but only sputters some and then backfires occasionally

Customer (name blocked for privacy)
Status:  Closed   Value: $10
Answer
December 6 9:57 AM (3 minutes and 53 seconds later)
         
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john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
Reply
December 6 10:02 AM (5 minutes and 21 seconds later)
         
The motor is new and has new Plugs, wires, cap and rotor, and carb.
Customer (name blocked for privacy)
Info Request
December 6 10:17 AM (14 minutes and 56 seconds later)
         
I don't know why but sometimes all the info in not there when I open questions.The stuff that you already tried wasn't there a few minutes ago. Ok lets start again Does it back fire out the exhaust or the carb??

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john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
Reply
December 6 3:50 PM (5 hours and 32 minutes and 33 seconds later)
         
it is backfiring out of the carb. it caught fire one time
Customer (name blocked for privacy)
Answer
December 6 4:15 PM (24 minutes and 39 seconds later)
         
ACCEPTEDCheck Mark
It idefinately out of time. Pull the #1 plug roll the engine by hand until you get the piston all the way up TDC -then pull your dist. cap and see where the rotor is pointing-should be pointing at the #1 wire spot on your cap-if not -turn the dist. Make sure of which direction the rotor is turning when you reinstall the plug wires. Tshoud get you really close to being in time.

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john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
Reply
December 6 4:54 PM (39 minutes and 23 seconds later)
         
i pulled the distributor and rechecked the timing like you recomended but it still spitting gas out of the carb. like it is backfiring still.
whats wrong? every time the #1 piston rolls to TDC the dist. is hitting the #1 electrode like it is supposed to. i changed the coil to make sure it was getting spark and it is. do you think the new carb. is the problem? it is a HOLLY #4150 600cfm Manuel choke carb. any tuning suggestions will be appreciated!
Customer (name blocked for privacy)
Answer
December 6 5:11 PM (17 minutes and 26 seconds later)
         
ACCEPTEDCheck Mark
It very well could be playing a part in this. I suggest starting back at making double sure you are on the #1 and making sure you have some good dry plugs in there.If you can get it fired up then you can TWEEK the carb-but you will also need to get it timed closer by using a timing light if you have one. You may have all your plugs wet and loaded up with gas right now.

If my info has helped you in any way please hit the accept button, and remember bonuses/tips are always nice. If you have any further questions don't hesitate to ask. Thank you.
john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
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