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Slow cranking/Tight motor

tml

Sr. Member
Joined
Mar 10, 2004
Messages
886
Loc.
Ontario, Canada
I've got a 302 here that has been siting a while. When I boost her, she turns real slow, some times not at all. I through about a litre of deisel fuel down the throat of the carb and let her sit for a week. I tried it again and nothing. I tried a good starter, same results. I've got spark. I just can't get her cranked fast enough.

Any suggestions.
 
OP
OP
tml

tml

Sr. Member
Joined
Mar 10, 2004
Messages
886
Loc.
Ontario, Canada
I cleaned up the connections at the celenoid. The battery is bad I know this. I put a booster on the power side of the celenoid and ground accordingly, still the same result. I would think the booster would supply enough power to turn it?
 

Itsa67

Sr. Member
Joined
Jan 26, 2006
Messages
446
How is your timing? If its off significantly it can cause slow cranking. Sometimes those boosters don't like to do all the work so you might also try swapping in a known good battery and giving it a try.
 

br0nc0xrapt0r

Loves pickles
Joined
Sep 28, 2007
Messages
5,437
How is your timing? If its off significantly it can cause slow cranking. Sometimes those boosters don't like to do all the work so you might also try swapping in a known good battery and giving it a try.

X2 thats what was wrong with an old car I was working on, try a new battery.
 

Broncobowsher

Total hack
Joined
Jun 4, 2002
Messages
34,821
I cleaned up the connections at the celenoid. The battery is bad I know this. I put a booster on the power side of the celenoid and ground accordingly, still the same result. I would think the booster would supply enough power to turn it?

We have a collection of several hundred cars at work. Those booster backs are great. But they are a booster back, not a replacment for a bad battery. Many times we will need to tag team the booster (use 2) on a real dead battery.

So we are back to dealing with battery connections. Those booster clips are not as good as a real battery connection. How many times have I wiggled them to try and get just a little better bite for just a little better jump start I can't count.

Try a real battery in good shape, see what happens.
 

av bronco

Bronco Guru
Joined
Mar 3, 2008
Messages
1,742
Loc.
Palmdale CA
I had the same problem a while back, turned out the fuel pump drive was rubbing on the timing gear cover(I changed the timing cover)it was about .80 thinner then stock.
 
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