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> Help, stuck on road
Amphicar770
post Apr 29 2017, 02:41 PM
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Help, I'm stuck on side of road with no start.

Took 914 2.0 out a few days ago. Ran great but once she got hot I started noticing some bucking on acceleration. Went home, next day did a short run and all seemed fine.

Took her out today, it's hot out. Running great. A few miles from home I stop at traffic light. Uh oh, engine died. Turn key and it cranks but no fuel, spark or something. Just swapped out coil with a new one in trunk. Just have basic tools with me.

Any help or ideas appreciated. For example, how do I know if fuel pump is running?

Thanks.

Mike
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Rand
post Apr 29 2017, 02:44 PM
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Listen closely when you first turn the key on (before cranking). With a djet you should hear the pump run briefly.
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Amphicar770
post Apr 29 2017, 02:51 PM
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Pretty sure I hear pump cycling.
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mobymutt
post Apr 29 2017, 03:20 PM
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Mine did the same sort of thing last year, turned out that a new distributor cap and rotor fixed it.
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Amphicar770
post Apr 29 2017, 03:24 PM
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Thanks. Cap and rotor are new but that does not mean they can't fail. May try old one before I grab the trailer, I think I kept it.

I can smell fuel after heavy cranking so I am leaning toward no spark issue but not sure given no real test tools with me.
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ConeDodger
post Apr 29 2017, 03:28 PM
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An interjection, and I'm not saying you don't Mike, I obviously don't know.

You cannot own a 40 year old sports car without having some kind of roadside assistance / towing plan on your insurance. You will probably need it.

Good luck Mike! (IMG:style_emoticons/default/unsure.gif)
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wes
post Apr 29 2017, 04:03 PM
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Could it be a vapor lock?
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wndsnd
post Apr 29 2017, 04:09 PM
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You should say where you are. Maybe someone is close by that can assist...

I doubt you drove up to MA, but if you did, there are a bunch of us ready to jump in our cars and run down to meet you.
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76-914
post Apr 29 2017, 04:23 PM
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If it's vapor lock it will cool down enough to start after it sits about 40 min's. (IMG:style_emoticons/default/beerchug.gif)
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Amphicar770
post Apr 29 2017, 06:45 PM
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Had a neighbor rescue me. Returned with my trailer and hauled it back home. Fortunately, I was not too far out.

Still sitting on trailer, will try to figure it out tomorrow. I am inclined to think it is not getting spark. Cap / rotor sound like reasonable suspects. I do have the Rev limiting rotor in there if that matters.

If I could afford a new Alfa Giulia, and it came in a stick, today would have been the day I said, "I'm done".

Thanks to those who replied.
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r_towle
post Apr 29 2017, 09:20 PM
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have you ever cleaned your advance plates and re greased them?
The OEM grease gets like glue when hot.
Keeps the plates to advanced to start the car.

If it happens, reach in and gently push them back to non advance position.

OR,
take them out and clean between the two plates (screws in the side) and add a nickel of breaking grease to make them all smooth again.

Rich
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Amphicar770
post Apr 30 2017, 08:37 AM
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The mystery deepens.

Yesterday she had 2 hours to cool down by the time I got my trailer. Still a no start.

This AM I pulled off the distributor cap and rotor. They looked fine. Put them back on, turned the key and she fires right up. Sputtered a little clearing out the excess fuel but then smooth.

I suspect the underlying problem remains but have no idea what it might be.
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boxstr
post Apr 30 2017, 08:42 AM
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Remove the rev limiting rotor and try a straight rotor?
Craig at CAMP
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GeorgeRud
post Apr 30 2017, 08:43 AM
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The bucking that started it all makes me considering vapor lock as well. Has your fuel pump been relocated to the front? That pretty well would eliminate vapor lock as the cause.
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Dion
post Apr 30 2017, 08:43 AM
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Mike, my old d-jet would give me fits like this.
Many times it was electronic. Is the relay plate in good shape? No cracks?
Make sure all the grounds are good.
Just an idea.
Cheers, Dion
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ChrisFoley
post Apr 30 2017, 08:47 AM
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Too lean.
Where's the idle mixture screw on the ECU set at?
If it runs best at full rich, the MPS needs adjustment.
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Amphicar770
post Apr 30 2017, 09:55 AM
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Fuel pump is at front. All new lines, hoses from front to back, new fuel pump, tank restored about a year ago. Wiring harness is is also a year old as is mps (NOS unit), cht, injectors, plugs, wires, hoses, etc. She was running great last summer and winter. Has pertronix, may have original trigger points.


I know I had a challenge getting the three harness ground connectors snug below/ near throttle body. Guess I will recheck those. Also ordered non rev limiting rotor so that is a cheap test.

The challenge is that it is not constant which makes diagnosis harder. She will be purring at all revs and then ... Don't want to wander too far from home until I resolve.
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saigon71
post Apr 30 2017, 06:34 PM
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I had a similar intermittent problem a few years ago. I started bench testing every FI component I could. When reinstalling the CHT, I noticed a piece of debris under the CHT sensor. Removed the junk, reinstalled and haven't had the problem since. My guess is that it was causing intermittent grounding issues as the head heated & cooled.

Make sure your CHT is tight in the head and verify that your CHT connection is good.

Good luck & keep us posted.
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Amphicar770
post Apr 30 2017, 08:13 PM
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Might I have found the problem??

Bob's reply prompted me to check the cht connector. I reached down for the wire and it looks like it was already out of the harness connector or was at least certainly very loose as it was just there.

Seems like that could be it although I thought a disconnected cht would cause cold start / cold running issues rather than when hot as I experienced.

Anyway, keeping my fingers crossed and thanks again.
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iamchappy
post Apr 30 2017, 09:18 PM
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It all happens so fast!
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Check coil wire to dizzy. happened to me once..
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