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Old 12-10-2011, 06:21 PM   #1
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Unresponsive

Quick description:
2000 TJ 4.0
Died at highway speed
Started up again and got home
No codes from ECU
Replaced fuel & fuel pump
Still dead
48 lbs of pressure at the fuel rail

Detailed description:

On my way home yesterday my 2000 TJ died at highway speed, then came back to life just as quickly. Then died for good.
(With that I know the cam position sensor is ruled out. It has been replaced, and the ECU only uses that sensor when it starts up.)

As I was waiting for tow, I kept trying any trying to get it to start. After about 30 minutes it fired up, and died. But I gave it another crank and it fired up, and I drove home, just 3 miles.

It hasn't thrown any codes either.

I read another post in the forum that indicated it might be a fuel pump. With 150,000 miles, it needed one anyway, so I replaced the fuel pump and fuel, and it still won't start.

I turn the key and the pump buzzes. At one point, with the key on for several minutes I heard the pump buz. So I tried again. It started up, but only for a few seconds.

Any suggestion or known issues like this?

Thanks in advance,
Cody
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Old 12-10-2011, 06:25 PM   #2
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Have you checked timing? That happened with me and an srt4 I had turned out it was the timing belt O_o it blew at idle lol

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Old 12-10-2011, 06:39 PM   #3
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It will start every once in a while for a few seconds or minutes. No back fire.
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Old 12-10-2011, 08:03 PM   #4
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How's ur spark?
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Old 12-10-2011, 08:27 PM   #5
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Well, I have the rail of coils on the plugs, no spark plug wires. I am going to figure out how to test that tomorrow.
Honestly, I was hoping for an obvious known issue. :-)
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Old 12-10-2011, 08:52 PM   #6
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OK. I dug out my old trusty code reader. It did throw codes after all.
1282 Pump Relay Control Circuit
320 Ignition/Distributor engine speed circuit

Where is the Pump Relay Control Circuit?
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Old 12-10-2011, 09:38 PM   #7
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Quote:
Originally Posted by CeeDubb View Post
OK.

Where is the Pump Relay Control Circuit?
That was a stupid question.
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Old 12-10-2011, 10:11 PM   #8
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No it wasn't, lol where is it? I honestly haven't touched my fuel pump, but eventually probably will.
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Old 12-12-2011, 07:33 PM   #9
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Ended up being the Crankshaft Position Sensor.

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