polecat702

Yesterday evening, took the wife to dinner. On the way there, ran into some road construction. ( seems like every street in Vegas is torn up) The car bottomed out, on the protection plates in got from Carl, and died. Put it in neutral, while coasting, and it started right up.

On the way home, bout a mile out it died again, and wouldn't restart. I ran the battery down, so I left Dee at a bar across the street and walked home. Grabbed my El Camino, and went back pulled the battery, recharged it, replaced the fuel pump relay, with a new one, and it started right up, drove it home parked it in the garage. Where it sits today.

Dee followed me home in the El Camino, I didn't leave her in the bar, in case any one is thinking I did.


I haven't tried to start it today, but was wondering where I should start looking for why it died and refused to start. I suppose it sat for a couple of hours while I walked home, did the battery pull, and recharge, and replace. BTW, it was over 100 here yesterday afternoon, it temp would be a factor.

As always, all suggestions, and ideas are appreciated!

joe

ammonman

As Mrmerlin says "What was the last thing you worked on?" Sounds like a loose electrical connection somewhere. Has the CPS been replaced? Does the plug have the wire retainer on it? How is the harness side of the plug? I had a battery in the 928 once that had a loose plate inside. When I would hit a hard bump the plate would short momentarily and voltage would drop, causing all kinds of weird symptoms.

Mike

polecat702

The last thing we did was install the VCB Supercharger. The Hall, and knock sensors, have plug connections that have seen better days. The harness it self is fine. We checked during the blower install.

I need to do a top end refresh. Plus my battery is 5 years old, so it's time for that as well. I do disconnect it when I'm gone for work projects, it's always started the car right up.

Time to put her up on the lift, and start looking and checking. I've never looked at the CPS, guess that's a good start.

Wisconsin Joe

Did you happen to notice if the tach was moving when you were cranking it?

Good symptom of a bad CPS. The rest of it fits, too. Sudden shut off, starts and then shuts off a bit down the road.

It could be the sensor itself, the wiring (on the sensor) the plug or the wiring from the plug to the car (harness).

SeanR

Joe, do you have your battery clamped own good? This is common if the battery is able to jump around and the hot post hits the battery cover.

Hold On

I was thinking what Sean was thinking. Also the impact could have busted a plate loose. I think you should just bring it down here to Phoenix so it can sit next to mine at the shop... I`m halfway thru a 5spd conversion.

jcorenman

Joe, I am thinking fuel-pump relay:

Coincidence? Maybe. I don't much believe in them, but they do happen.

polecat702

Battery has the factory clamp, and it's tight, battery can't move.
I don't think the CPS, has ever been changed, the harness is good but some of the sensors have deteriorating connections on the sensor side. Falling apart cause they're brittle.

I pulled, the fuel pump relay, it's new, but cleaned the CE where it plugs in. Also the LH Relay. is new today, cleaned the CE for it also. Pulled the EZK relay, two of the blades were black, used some emery cloth, and DeOxit and cleaned it, didn't have a spare, so it's back in place. Swapped out the fuel pump oxy sensor fuse.

The car started right up, after I did what I described above. While I'm gone this month, I'll order some more 53 relays, a new EZK relay, CPS sensor, and I'll p/u a new battery when I get back home. Plus I have no idea when the fuel filter was change last if ever. Plus I want to see if his thing has the internal pump in the tank, or the screen. I need to adjust the front ride height, and get the car aligned afterwards.

Hopefully it'll be good for the run up to Spokane next month.

Then I'll have time to do the top end, before 3rd coast. See if I need to put in the intercooler should this thing run warmer than usual.

That's where I'm at for now.

Thanks for all the help!!

polecat702

We need to make a run to the Sun, Kevin! Way over due for a visit!! Dee's sister is in Fountain Hills, she wants us to come down also.

I shifted enough gears in my life, so I prefer the slush box.

We'll get there over the summer. Say hi to Andrew for us! Maybe I should leave it and let Andrew play around with it. I know he'd figure it all out!

Take care
joe

polecat702

I just went back out and restarted the car 3 times. The tach never moved till it was running. Is that good or bad?

Wisconsin Joe

Don't know.

My understanding (and I could be wrong) is that the tach should "bounce" a bit when cranking. It may take a a turn or two for that to happen.

Is it starting immediately, or does it crank for a few seconds before firing up?

My 944 had intermittent "quit" and "no start" issues that I finally tracked down to the CPS. For "no start" situations, the tach would stay still. I would be cranking it for 10 or 15 seconds.

Or I could be totally wrong.

polecat702

It started almost immediately.

Randy V

Giuseppe, use the Uber app. Walking is for those with limited resources.

OTR18WHEELER

....and the prius drivers behind me wonder why I have a "I brake for dead 'coons, and squirrels" bumper sticker.

Simon928

Something similar happened to me last year--it freaked me out. I was driving to work and there was a small strip of asphalt that was ripped out and it was a much bigger bump than I thought it was. I'm not sure if my car bottomed out or not but the violent shake made my car shut off. I also got a few error messages on the digital dash--I think one of them was "anti-lock brakes" if I remember correctly. Luckily I was going downhill so I coasted into a parking lot. I turned the car back on and went on my merry way and never had a problem again. I always assumed that there was something loose that got shaken when I went over the bump but I was never sure what it was.