Auto Repair forum

General discussion

96 jeep G C won't start tried the E C M screws , need help

by cassey2 / December 20, 2008 8:30 AM PST

96 Jeep Grand Cherokee Laredo 4.0 4x4 245xxx miles. was running fine, turned engine off , it has not started since. no pressure at fuel rail no spark at plugs , fuel pump never gets energized , not even the timed period after turning the key, can bypass pump relay and pump runs. At this same time the fuel gauge quit working low fuel warning stays on .
Have checked all fuses in the dist. box and the BCM
I have tried the short screws in the ecu, have pulled and wiggled the wire harness, switched the relays from other sockets ( known good ).
replaced the ECU with one from a wrecked ( not a junked ) vehicle.
what energizes or deenergizes ASD relay.

Post a reply
Discussion is locked
You are posting a reply to: 96 jeep G C won't start tried the E C M screws , need help
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: 96 jeep G C won't start tried the E C M screws , need help
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
Collapse -
96 jeep G C won't start tried the E C M screws , need help
by i4adodge / December 25, 2008 11:37 PM PST

The ASD relay is controlled by the PCM, usually if this is the problem, you can swap the ASD relay with another matching relay (I use horn relay), and it will usually clear up.

That said, if you still have troubles, visit the forums at - there are a few posters over there who can give you some good suggestions.

Collapse -
problem solved jeep grand cherokee will not start
by cassey2 / March 10, 2009 10:04 AM PDT

I replaced the ECM with a known good one did not help. There was no spark no fuel and the instrument gauges ( volt, fuel ect.) would not work.
I disconnected the crankshaft sensor and the gauges worked, so I then replaced the sensor and all is fixed , running fine.


Popular Forums
Computer Help 51,224 discussions
Computer Newbies 10,453 discussions
Laptops 20,090 discussions
Security 30,722 discussions
TVs & Home Theaters 20,937 discussions
Windows 10 1,295 discussions
Phones 16,252 discussions
Windows 7 7,684 discussions
Networking & Wireless 15,215 discussions


What do the color stripes mean on your tires?

Brian Cooley tells you why you might see various color lines on the wheels of your automobile.