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motor issues please help!!

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motor issues please help!!
bigredbronco Offline
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#1
12-22-2012, 10:37 AM
She has no problem starting but once I put it in drive she stuggles and cuts off. cant even get more than 5 feet. just redid the timing but it didnt help
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chuzie Offline
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#2
12-22-2012, 10:42 AM
What year and type of motor and transmission
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.Confusedmokin:
Roads? Where we're going, we don't need roads.

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bigredbronco Offline
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#3
12-22-2012, 10:50 AM
82 351. I think this is its 3rd motor and the transmission only has like 5k miles on it
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chuzie Offline
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#4
12-22-2012, 10:53 AM
So carb and C6?
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.Confusedmokin:
Roads? Where we're going, we don't need roads.

[Image: sig2.jpg]
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chuzie Offline
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#5
12-22-2012, 11:02 AM
What is your idle set at?
How long has this been going on?
Any recent changes other than the timing?
What did you set the timing to?
Can you keep it running with a little extra throttle?

I have additional question depending on EFI or carb and auto or manual trans response.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.Confusedmokin:
Roads? Where we're going, we don't need roads.

[Image: sig2.jpg]
Website Find
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bigredbronco Offline
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#6
12-22-2012, 11:07 AM
its got an eddlebrock carb. it idles at 800 and stays there it only happens when I try to go somewhere. it got this bad a couple days ago and i havent messed with it since. only thing i have done other than the timing is a new alt. i set the timing so the light matched up and no matter how much throttle i give it it sounds like its starving and dies. its an auto. I would have more info about it but ive only had it for a month and a half
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chuzie Offline
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#7
12-22-2012, 11:20 AM
So in park or neutral, you can punch the throttle and it runs fine? This issue only occurs when you place it in gear?

I am inclined to say you have a carb issue(s) perhaps vacuum kick, fast idle cam index, or fast idle RPM adjustment.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.Confusedmokin:
Roads? Where we're going, we don't need roads.

[Image: sig2.jpg]
Website Find
Reply
bigredbronco Offline
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#8
12-22-2012, 11:22 AM
It happens when I do it in park/neutral but only sometimes. you think maybe my jets are clogged? Or could it be a filter
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chuzie Offline
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#9
12-22-2012, 11:26 AM
I bet the sometimes parts is dependent on engine temp. If you have a clogged jet or filter, it would stall out in Park/Neutral as well when you punch the throttle.

Check out a tech manual for procedures to set the aforementioned parameters.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.Confusedmokin:
Roads? Where we're going, we don't need roads.

[Image: sig2.jpg]
Website Find
Reply
bigredbronco Offline
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#10
12-22-2012, 11:30 AM
shall do. I tried letting it heat up. when its cold it idles at 2k but all i have t do is just kick the gas and it settles at 800
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