hard to start
 

Sometimes my 85 CJ7 is very hard to start. It cranks very slowly and
eventually turns over after about a minute of trying. It only happens
when the engine is hot. What could it be?

Re: hard to start
 

Jim85CJ did pass the time by typing:
> Sometimes my 85 CJ7 is very hard to start. It cranks very slowly and
> eventually turns over after about a minute of trying. It only happens
> when the engine is hot. What could it be?

I'd be checking battery, battery cables, and engine ground strap.

Not sure about all the electrics on your year. If it was my old
C-10 I'd be checking the carb to see if it's delivering fuel
to the engine or if the line to your fuel pump has gotten vapor locked.
(side note, on the 305 the fuel pump lines run close to the manifold
and in HOT weather can vaporize causing the pump to suck gas, a bit of
wrap-on heat tape works wonders)

--
DougW

Re: hard to start
 

Jim85CJ did pass the time by typing:
> Sometimes my 85 CJ7 is very hard to start. It cranks very slowly and
> eventually turns over after about a minute of trying. It only happens
> when the engine is hot. What could it be?

I'd be checking battery, battery cables, and engine ground strap.

Not sure about all the electrics on your year. If it was my old
C-10 I'd be checking the carb to see if it's delivering fuel
to the engine or if the line to your fuel pump has gotten vapor locked.
(side note, on the 305 the fuel pump lines run close to the manifold
and in HOT weather can vaporize causing the pump to suck gas, a bit of
wrap-on heat tape works wonders)

--
DougW

Re: hard to start
 

Jim85CJ did pass the time by typing:
> Sometimes my 85 CJ7 is very hard to start. It cranks very slowly and
> eventually turns over after about a minute of trying. It only happens
> when the engine is hot. What could it be?

I'd be checking battery, battery cables, and engine ground strap.

Not sure about all the electrics on your year. If it was my old
C-10 I'd be checking the carb to see if it's delivering fuel
to the engine or if the line to your fuel pump has gotten vapor locked.
(side note, on the 305 the fuel pump lines run close to the manifold
and in HOT weather can vaporize causing the pump to suck gas, a bit of
wrap-on heat tape works wonders)

--
DougW

Re: hard to start
 

Jim85CJ did pass the time by typing:
> Sometimes my 85 CJ7 is very hard to start. It cranks very slowly and
> eventually turns over after about a minute of trying. It only happens
> when the engine is hot. What could it be?

I'd be checking battery, battery cables, and engine ground strap.

Not sure about all the electrics on your year. If it was my old
C-10 I'd be checking the carb to see if it's delivering fuel
to the engine or if the line to your fuel pump has gotten vapor locked.
(side note, on the 305 the fuel pump lines run close to the manifold
and in HOT weather can vaporize causing the pump to suck gas, a bit of
wrap-on heat tape works wonders)

--
DougW

Re: hard to start
 

> I'd be checking battery, battery cables, and engine ground strap.
They all checked out.

> Not sure about all the electrics on your year. If it was my old
> C-10 I'd be checking the carb to see if it's delivering fuel
> to the engine or if the line to your fuel pump has gotten vapor locked.
Would vapor lock cause the engine to crank hard? It almost feels like
the starter is fighting some hard compression.

Re: hard to start
 

> I'd be checking battery, battery cables, and engine ground strap.
They all checked out.

> Not sure about all the electrics on your year. If it was my old
> C-10 I'd be checking the carb to see if it's delivering fuel
> to the engine or if the line to your fuel pump has gotten vapor locked.
Would vapor lock cause the engine to crank hard? It almost feels like
the starter is fighting some hard compression.

Re: hard to start
 

> I'd be checking battery, battery cables, and engine ground strap.
They all checked out.

> Not sure about all the electrics on your year. If it was my old
> C-10 I'd be checking the carb to see if it's delivering fuel
> to the engine or if the line to your fuel pump has gotten vapor locked.
Would vapor lock cause the engine to crank hard? It almost feels like
the starter is fighting some hard compression.

Re: hard to start
 

> I'd be checking battery, battery cables, and engine ground strap.
They all checked out.

> Not sure about all the electrics on your year. If it was my old
> C-10 I'd be checking the carb to see if it's delivering fuel
> to the engine or if the line to your fuel pump has gotten vapor locked.
Would vapor lock cause the engine to crank hard? It almost feels like
the starter is fighting some hard compression.