bkmatlock

Ok here it goes and i'm sorry I know you techs get tired of hearing repeat issues.

1994 GC laredo ZJ
4.0
Auto
4x4
No keybob

Had start issue since I bought it. ALways hav had to cycle the key in the ignition till relay chattered and started. (always had to everytime I started it)

Situation now below>

1 My Girl friend left the key on drained the battery completly (It was shot).
2 Swapped the new battery.
3 Engine started (still had to cycle igniton key to chatter relay)
4 let run for about 8 min till it just shut off!
5 Now no spark, fuel pump noo relay chatter either now!
6 No check engine light with key on but not started (Thought it was on before in run position but not started)
7 Tried to cycle key in all doors and hatch no luck
8 tried to ground purple/yellow wire in kick pannel NO luck!
9 Relpaced relays no luck
10 Replaced CPS no luck
11 Hav voltage at coil
12 Have voltage at cps
13 cps pinc b and c open on meter


Can someone please help, This is not a daily driver its a trail rig. Has seen only light trails.

Thx brian :hamm er:

bkmatlock

Gonna go ck the netural safety switch for sh@ts and giggles now> no luck

bkmatlock

coil plug on grey/wht 12.3vdc 0 on green/blk

cps 14.86 on A-terminal
0 on B terminal
4.94 on C terminal
Open ohms on B-C

Distributer plug from harness notch of plug to left
A-terminal 4.95
B terminal 0-vdc
C terminal 15.00 vdc

bkmatlock

UPDATE!!!!!!!!!!!
Installed new pcm computer!!!
Started right up
Took to shop had computer read could not read it
No ck engine light with the key in the run position before starting is a sure fire sign that its bad...!

Only a 13.00 part form the computer! LOL was expecting to pay 100+

Thanks all who tried!!!
Brian

I will post some pics of the build soon also!!

jeepfan93

where did you get a pcm for $13?

bkmatlock

Kankakee, Illinois auto salvage

Brian