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brownjeff
brownjeff, ASE Certified Technician
Category: Jeep
Satisfied Customers: 13886
Experience:  17 years experience, ASE certified, dealership certified, Service Manager for 15 years,
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1996 jeep grand cherokee: cold outside frost on windshield. Cranks

Customer Question

1996 jeep grand cherokke 4.0 will not start this morning. cold outside frost on windshield. Cranks over,but will not start. Early this year I cleaned out the throttle body and the IAC. Because it would not keep idle. It worked fixed the problem until now and when I did clean out throttle body it was early this year.
Submitted: 7 years ago.
Category: Jeep
Expert:  brownjeff replied 7 years ago.

Do you have fuel pressure?

 

Do you have spark to the plugs?

Customer: replied 7 years ago.
I'm pretty sure I do I drove it lst night and there seemed to be no problems
Expert:  brownjeff replied 7 years ago.

The vehicle needs spark, fuel, compression, and all at the correct time to run. I would assume the compression and timing are ok as it ran fine the day before so that leaves fuel and spark. If you have not replaced the plugs in the last 30,000 miles I suggest doing this first as worn plugs will cause the vehicle to not start when it is cold out.

Customer: replied 7 years ago.

now....if I gave it a tune-up and it still does not start...then what?

 

Expert:  brownjeff replied 7 years ago.
Then we are back to checking to see if you have spark and fuel pressure. Can't assume you have it need to check.
Customer: replied 7 years ago.

How will I check for fuel pressure?

 

Can you recommend a spark plug brand & #

Expert:  brownjeff replied 7 years ago.

Champion would be the brand, but I don't know the number off the top of mu head.

 

You will need a fuel pressure gauge to check the pressure.

brownjeff and 3 other Jeep Specialists are ready to help you
Customer: replied 7 years ago.

Thnaks alot!

 

Customer/p>
Expert:  brownjeff replied 7 years ago.

No worries.....

 

Good Luck,

 

JB

Customer: replied 7 years ago.

Hello again,

 

This is what I did: I replaced fuel filter,plugs,wire,cap, rotor. I tried to start jeep.....it still did not start. I removed the middle spark plug and checked for spark. no spark. I removed the coil wire from the dis/cap and inserted a spark plug.tried to start.no start.

Then I assumed it was the coil. I replaced the coil and recheckedd for spark. no spark.

 

I disconnected the battery hoping that it would reset the computer. no luck.

 

Now I am stumped what else could it be........?

 

Randall

Expert:  brownjeff replied 7 years ago.

Do you have power going to the coil?

 

Starting to sound like a bad cam sensor or crank sensor......