93GC cranks but no start, check engine light!!

[nart86]

the security light comes on after leaving the key in for like 40 seconds
can u plz check urs

[dksob81]

sorry I forgot to check this morning, I will check as soon as I get home.

[darko]

Dude! Any developments on your starting problem? I was poring over the forums (fori?) and your case is EXACTLY like mine - ie: no check-engine light = no start. If/when it flashes on, I know it will start.
Mine's been in the shop for weeks, trying all sorts of stuff (crank sensor etc.) but no dice.

Just curious if / how yours was solved.

Thanks

[Dale Aeppli]

Originally Posted by darko

Dude! Any developments on your starting problem? I was poring over the forums (fori?) and your case is EXACTLY like mine - ie: no check-engine light = no start. If/when it flashes on, I know it will start.
Mine's been in the shop for weeks, trying all sorts of stuff (crank sensor etc.) but no dice.

Just curious if / how yours was solved.

Thanks

HI, HAVE YOU CHANGED THE CRANKSHAFT SENSOR. DO YOU HAVE SPARK AT THE COIL WIRE. YEAR, MAKE, MODEL AND ENGINE , AND ANY OTHER INFO YOU HAVE ON PROBLEM DALE jeepman600@aol.com

[darko]

Aha! The famous jeepman! I almost emailed you before posting.
Crankshaft sensor replaced - no dice. It is a 93 Grand Cherokee limited with the inline six cylinder engine and selectrac 4x4.
I'm starting to suspect the ECM module or connections to it, maybe the relay (thus the no check-engine light when it won't fire).
Thanks

[Dale Aeppli]

Originally Posted by darko

Aha! The famous jeepman! I almost emailed you before posting.
Crankshaft sensor replaced - no dice. It is a 93 Grand Cherokee limited with the inline six cylinder engine and selectrac 4x4.
I'm starting to suspect the ECM module or connections to it, maybe the relay (thus the no check-engine light when it won't fire).
Thanks

Does the gauges on dash work when you turn key on dale
can you hear the fuel pump relay click when you turn key on

[darko]

The gauges work; nope, can't hear the pump.
Also, this started (could be a coincidence) when the weather turned colder. Just when we need a Jeep most.
However, when the Check-engine light DOES light up, then it DOES start, and I can hear the pump, and a major click/buzz from pax-side firewall (near the ECM?)

[Dale Aeppli]

Originally Posted by darko

The gauges work; nope, can't hear the pump.
Also, this started (could be a coincidence) when the weather turned colder. Just when we need a Jeep most.
However, when the Check-engine light DOES light up, then it DOES start, and I can hear the pump, and a major click/buzz from pax-side firewall (near the ECM?)

if yours has a power distribution box remove lid look and see what relay is for ASD change the ASD relay with one of the other relays, they are all the same. email me i can get back faster jeepman600@aol.com

[dksob81]

DARKO, was the brand of CPS you used Borge Warner or something like that, if so replace it with a different brand EICHLIN is a good one.

[nart86]

Originally Posted by dksob81

DARKO, was the brand of CPS you used Borge Warner or something like that, if so replace it with a different brand EICHLIN is a good one.

dude. u need to replace the computer. just stop poring money into the jeep and get a new computer.
all my problems have been gone ever since.

[darko]

Thanks for the info! I was hoping to hear from you as the symptoms are bang-on same as yours. Now the hunt begins. Car-part.com lists them but I've never seen so many options to choose from. Have to check my data.
Thanks

[darko]

And...voila! Same thing. Replaced the computer and that did it. Still waiting for the mech's bill for all the dorking he did before this...

[mikec041]

Detail shop i took my GC to a while back would not touch engine compartment due to the sensors being to fragile.
Check the connector at the MAP sensor for corrosion
go to radio shack and pick up a can of contact cleaner and try cleaning the connector to MAP before you replace it.

[PrestonP]

Originally Posted by darko

Dude! Any developments on your starting problem? I was poring over the forums (fori?) and your case is EXACTLY like mine - ie: no check-engine light = no start. If/when it flashes on, I know it will start.
Mine's been in the shop for weeks, trying all sorts of stuff (crank sensor etc.) but no dice.

Just curious if / how yours was solved.

Thanks

Darko, so the replaced computer fixed all your problems? I have the EXACT problem - plus - my alarm has been going off at strange hours of the night. In your experience, do you think that the starting issues and the alarm are connected in some way?
Glad to hear the jeep is all better now.
thanks

[darko]

So far so good; the problem hasn't come back, although one morning I had a scare. But yes - the computer did it. I got a reman online; 275 plus core deposit 100 which you get back. Seems cheaper in the long run, and saves a lot of heartache each time a new fix doesn't do it.
Not sure about the alarm affecting the computer; mine wasn't bleating, except after looooong cranking it would beep a couple of times.