justinlogue5_0

I just dropped my son off at school and was heading for the highway when I heard a pop and the the motor just died like some one shut off the ignition. I rolled into a parking spot and tried to crank it and it just turns over. I figured the pop was a fuse so I started checking and the #7 was blown. I went to put a new one in and pops just as soon as you get it put into place. Manual says its pcm and some thing else I can't remember right now. Got a ride back to the house and drove my truck to work instead. Sooo, when I get home and start digging into this thing, what and where should I look? I did glance this morning and didn't see any thing that just jumps out at me. Thanks.

Bert

There's a short to ground in the red/light green circuit. Here's a diagram for the circuit. Fig. #7. | Repair Guides | Wiring Diagrams | Wiring Diagrams | AutoZone.com

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Bert

justinlogue5_0

Well I haven't found any thing that actualy makes me think it was the problem but the car is back up and running. I found some rubbed areas and onewire that was melting against the manifold. The plastic loom stuff was melted but not the actual wires. I have yet to find a bald/bare spot in any of the wires. I have been re-routing wires and poking , prodding etc... Like I said its running now but I am not sure it won't happen again.

Stick462

Check the main harness coming from the under hood fuse box.As it goes down and runs around the right bumper and rad support the harness is known to fracture and rub threw the tape.

justinlogue5_0

Thanks! I really hope I find some thing so I can rest at ease thats its fixed.

Steve83

What kind of "thing" is it? Year, make, model?

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Walk softly & carry a BIG SIX ! ! !

. . . '99 CV RIP

justinlogue5_0

1998 Crown Vic (not the police car) 4.6 motor with the cobra intake and coils. I have yanked on, poked, prodded, taped and un-taped every single wire I can see and I found a couple potential problems but nothing that still really jumps out at me. Even while the car was running I wiggled, tugged etc... on wires and every thing is still good. Either I found it with out knowing it or it will show its self again later.

Steve83

Who changed the intake? I'd guess a wire is pinched under there, or in back.

From dash fuse 7, the circuit branches to the PATS module (above the fuse block), then goes thru the firewall to the PCM Power Diode, and continues to the noise capacitor, to all the coils. See if the capacitor looks burned.

__________________
Walk softly & carry a BIG SIX ! ! !

. . . '99 CV RIP

justinlogue5_0

I put the intake on. No pinched wire, checked it twice already I will check that capacitor and get back to ya. Thanks

justinlogue5_0

The noise capacitor, is that a black looking box roughly 5 inches square under the dash, maybe a little to the right of the steering column? If so its all good. Looks new and flexiable not old and burnt or any thing to make me think its bad. While car was running I wiggled those wires as well and had no change.