Wont start, not fuel pump, possible crank sensor???
#1
Seasoned Member
Thread Starter
Join Date: Jun 2011
Location: Van Buren Arkansas, was Joplin Missouri
Posts: 276
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0L
Wont start, not fuel pump, possible crank sensor???
It's cranking but won't start. Please help. Thanks.
#3
Seasoned Member
Thread Starter
Join Date: Jun 2011
Location: Van Buren Arkansas, was Joplin Missouri
Posts: 276
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0L
I haven't checked that yet. Its got new plugs and wires that I put in last month. That's one thing I'm gonna check tho. Can anyone tell me where the crank sensor is on a 1990 xj? 4.0l
#5
CF Veteran
Join Date: Nov 2010
Location: In the middle of Minnesota!
Posts: 5,804
Received 99 Likes
on
88 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
#1 thing to do is to pull a plug, place the plug electrode near a good engine ground, and have a buddy crank the engine while you watch.
You are looking for a strong, BLUE, snapping spark. Yellow/orange/white spark is a weak spark, which may not be strong enough to start the engine.
Start there. Test your way to a solution.
Do you hear the fuel pump energize and run for about 2 seconds when the key is turned to the ON position?
You are looking for a strong, BLUE, snapping spark. Yellow/orange/white spark is a weak spark, which may not be strong enough to start the engine.
Start there. Test your way to a solution.
Do you hear the fuel pump energize and run for about 2 seconds when the key is turned to the ON position?
#6
Seasoned Member
Thread Starter
Join Date: Jun 2011
Location: Van Buren Arkansas, was Joplin Missouri
Posts: 276
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0L
I pulled the fuel pump that I just replaced a month ago and it was still pumping but I took it back to the parts store and got a replacement an put it in last night. Nothing happened. Ugh this sux. I just moved to van Buren Arkansas from Joplin las Sunday and then it does this! Fml
#7
CF Veteran
Join Date: Jun 2011
Location: Nor-Cal
Posts: 2,858
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
You could kill two birds with one stone and just pour some gas in the throttle body. If it starts its fuel if it doesn't its spark.
Trending Topics
#8
Seasoned Member
Thread Starter
Join Date: Jun 2011
Location: Van Buren Arkansas, was Joplin Missouri
Posts: 276
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0L
Originally Posted by tjwalker
#1 thing to do is to pull a plug, place the plug electrode near a good engine ground, and have a buddy crank the engine while you watch.
You are looking for a strong, BLUE, snapping spark. Yellow/orange/white spark is a weak spark, which may not be strong enough to start the engine.
Start there. Test your way to a solution.
Do you hear the fuel pump energize and run for about 2 seconds when the key is turned to the ON position?
You are looking for a strong, BLUE, snapping spark. Yellow/orange/white spark is a weak spark, which may not be strong enough to start the engine.
Start there. Test your way to a solution.
Do you hear the fuel pump energize and run for about 2 seconds when the key is turned to the ON position?
#9
CF Veteran
Join Date: Jun 2011
Location: Nor-Cal
Posts: 2,858
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
No need for a buddy if you just pour some gas in the t.b. really sounds like fuel. Do you smell gas when you crank for a while? I just hate checking spark that way. Only do that last cause coils don't go out allll that often.... plus I don't like getting shocked.... does happen.
#10
Seasoned Member
Thread Starter
Join Date: Jun 2011
Location: Van Buren Arkansas, was Joplin Missouri
Posts: 276
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0L
Yeah I don't wanna get zapped either. I think I'm gonna go bar hopping tonight then worry bout testing tomorrow. I hear the crank sensors go out often aswell. But I bought one just in case, 30.99 won't break me so I'll look at changing this. Anyone know how hard it is and where exatly it is??
#13
Seasoned Member
Thread Starter
Join Date: Jun 2011
Location: Van Buren Arkansas, was Joplin Missouri
Posts: 276
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0L
Lol. I got skinny hands but not real small. Anyone got any pics. It's a 1990. Thanks
#14
CF Veteran
Join Date: Jun 2011
Location: Nor-Cal
Posts: 2,858
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by 90xjcjf
Lol. I got skinny hands but not real small. Anyone got any pics. It's a 1990. Thanks