Jeep will not start

XtrmTJ · Jan 27, 2008

1997 Jeep TJ, 4.0, ----
The Jeep has been sitting in garage for over 2 months now, tried to start it yesterday and both Optima batts were dead. I charged them just fine and the Jeep turns over but would not fire. I put new gas in it, nothing. I checked for fire, no fire to the coil, and no fire to eletric f/p. Guage cluster is not working. I check all the fuses and relays, all ok. I disconect the batts for over one hour to let ECU reset, nothing. I try to retrieve error codes and it will not give them to me. I am about to take it to the dealer to have a full dionostic done. Any ideas ? Any one have this happem to them ? Any help would be great !

JOOP · Jan 27, 2008

check all the fuse-able links??

Binder · Jan 27, 2008

You need to check the fault codes before you reset the ECU......Other than that I don't know.

CrustyJeep · Jan 27, 2008

Do any of the accessories work? Any of the ignition only accessories?

XtrmTJ · Jan 27, 2008

JOOP said:
check all the fuse-able links??

Checked all I could find, had to go buy a Haynes book to make sure I didn't miss any, all OK.

XtrmTJ · Jan 27, 2008

Binder said:
You need to check the fault codes before you reset the ECU......Other than that I don't know.

Well, it will not give me any error codes now ?

XtrmTJ · Jan 27, 2008

CrustyJeep said:
Do any of the accessories work? Any of the ignition only accessories?

The radio works, the head lights work, turn/stop/tail lights work, hazord lights work, Eletric rad fan works, eletric st fluid fan works, all off road lighting works. Winch works, interiour lighting works, only thing I can find not working is no fire to the coil and no fire to the f/p. ?

zukkev · Jan 27, 2008

There is a TSB regarding a poor connection on back of Instrument cluster; You said the cluster isn't working also?This may be a good area to start-remove cluster and check/tighten connectors; and retry...Also, smack the gas tank, as I had one with a bad fuel pump that sent me for a loop!!! For some reason if there was no pump operation, there was no spark from coil!!!! Put a new pump assy in it, It Fired Right Up!!!

4xjunkie · Jan 27, 2008

Verify your Auto shut down relay( ASD relay )

It supplys power to your, Coil, Injectors, PCM, , HO2S's.

Your Fuel pump relay is supplied from a different source

Remember just because it is clicking, doesn't mean it is working.

zukkev · Jan 27, 2008

Does the "check engine" light come on?Does the Digital odo light up when key is on? If not, I'd go for ASD relay......

KarlVP · Jan 27, 2008

Crank Position Sensor.

LuckyBoyOne3 · Jan 28, 2008

+2 on the Crank Positioning Sensor, the TJ's run without a cluster in them so that shouldn't be it.

4xjunkie · Jan 28, 2008

LuckyBoyOne3 said:
+2 on the Crank Positioning Sensor, the TJ's run without a cluster in them so that shouldn't be it.

But they won't run when there is no power to the coil or the fuel pump as he stated

megatoy66 · Jan 28, 2008

Won't start?...............stage fright.

XtrmTJ · Jan 28, 2008

megatoy66 said:
Won't start?...............stage fright.

LMAO, ..... TY, I needed a laugh, I am pulling my hair out over this one.

GaryTJ · Jan 28, 2008

By intuition and by your description, because all the regular electric functions, but not the electronics, I would say you hooked up, or charged the batterys backwards. Probably took out a fuseable link or a main fuse. (or worse)

Check your batterys with a voltmeter. red on poss and black on neg. Does it show proper voltage, or neg voltage?

XtrmTJ · Jan 28, 2008

GaryTJ said:
By intuition and by your description, because all the regular electric functions, but not the electronics, I would say you hooked up, or charged the batterys backwards. Probably took out a fuseable link or a main fuse. (or worse)

Check your batterys with a voltmeter. red on poss and black on neg. Does it show proper voltage, or neg voltage?

No, I was very careful when I conected the charger, red to pos and black to neg. Evem placed the charger on the tire to isolate it. How ever I may have pulled a boner, I did not disconect the batss when I charged them, would that cause a problem ? Darn, I may have done this to myself ?

Glenn · Jan 28, 2008

XtrmTJ said:
No, I was very careful when I conected the charger, red to pos and black to neg. Evem placed the charger on the tire to isolate it. How ever I may have pulled a boner, I did not disconect the batss when I charged them, would that cause a problem ? Darn, I may have done this to myself ?

I don't see how the current from the charger is going to get to the components when the key is in the OFF position ....