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Old 10-15-2013, 11:35 AM   #1
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No start issue, cranks but no spark or fuel

Family car was having a head issue, pulled it and it looked like it was the start of a sludge build up. Pulled the oil pan, head, timing cover and cleaned everything. Put it together and had a severe tick in the head. Seemingly was some worn out cam followers. Engine is running at this point, just not well. Bought oil pressure gauge to check the oil pressure at the sender unit behind the starter. Started the car up, checked pressure which was just about perfect. Took the gauge out, put in a brand new oil pressure sender unit and new cam followers. Button up motor and now it will not fire. The only new things between it working and not were the cam followers and the oil pressure sender unit.

2003 Aero ~130k miles auto.

When turning the car on, there is a buzzing sound from the what seems to be the DIC, the dash, and fuel assembly. The car turns over fine, but would appear to not be sparking or getting fuel. I have replaced the fuel pump with a known good one, and still the same thing. I have tired multiple DI's that are known good units, one of them coming from a running car. I have purged the fuel rail as well and there is fuel pressure there.

Anyone have any leads? Dead ECU? CPS?
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Old 10-15-2013, 02:09 PM   #2
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CPS is possible, also, any grounds you may have forgot/are loose? DI connector?
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Old 10-15-2013, 03:47 PM   #3
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I have a new CPS, that's the next step. Just seem like it would just up and fail like that. DI and connection should be good. I checked all te grounds that I could think if, mainly the ones attached on the right side if the intake manifold. Really the only connection differences was connecting the new oil pressure sender.
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Old 10-15-2013, 04:33 PM   #4
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Did you happen to swap the connector for the CPS and O2 sensors?
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Old 10-17-2013, 12:15 PM   #5
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New CPS sensor is in, nothing.

Here is video of what it's doing.
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Old 10-17-2013, 12:26 PM   #6
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That sounds like fun. Noticed one of the gear indicators flashing, perhaps NSS? Or ignition switch.
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Old 10-17-2013, 01:01 PM   #7
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Quote:
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That sounds like fun. Noticed one of the gear indicators flashing, perhaps NSS? Or ignition switch.
Yeah it flashes a lot of stuff. The CEL flashes, the air bag light will flash. Ugh.

I have the ECU out, might have another one flashed for the car. I'm really at a loss at this point, besides blindly throwing new things at it. I haven't see this before.

Would a NSS really cause all that?
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Old 10-17-2013, 01:50 PM   #8
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Oh sh&* that sound funky. Connections at starter and everything OK?

I was going to say your battery is toast, but then the thing started rolling over. I agree that it could be ignition related, but just given the work you did, I'd lean towards a ground or connection that you didn't do right.
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Old 10-17-2013, 02:03 PM   #9
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Oh sh&* that sound funky. Connections at starter and everything OK?

I was going to say your battery is toast, but then the thing started rolling over. I agree that it could be ignition related, but just given the work you did, I'd lean towards a ground or connection that you didn't do right.
Good call, I believe there is a ground connection to the back of the head.
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Old 10-17-2013, 04:21 PM   #10
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There's a couple at the thermostat.
I'd go ahead and re-check the battery terminals and the couple grounds on the engine.
It's certainly losing power to the ECU before you crank it. That's likely the CEL.
(cranking without the ECU powered will show the CEL)
I'd check the grounds, but I'd also check the NSS if it's an auto. could also be the ignition barrel, too.
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Old 10-19-2013, 03:44 PM   #11
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Did you line the cams up correctly?? that seams like the only place for something to happen in this process

Also, lots of dashboard lights like to flash if the main positive power to the fuse panel above the brake cylender is removed. its a 10mm nut/lug on the back of the panel
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Old 10-19-2013, 05:46 PM   #12
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Timing was fine. Turns out it was a loose ground, the one on the thermostat housing. It was connected, not tightened so it would be grounded sometimes.

Thanks a ton for that suggestion, doubt I would have noticed it if I wasn't looking for it.
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