[V8] Intermittent engine shut off

[D Morralee]

yJust a little note there is one more sensor other than the timing or reference sensor. The speedo sensor, works on the same principal as the timing or reference sensor. This is found inboard of the front Axel on the trans .
 
I had one a few years ago that went and caused the same symptoms. I've never heard of anyone else having a problem with their speedo sensor.
 
cheers superdave 
 

> From: tonyandlillie1 at earthlink.net
> To: john at bysinger.net; v8 at audifans.com
> Date: Thu, 13 Oct 2011 20:14:25 -0500
> Subject: Re: [V8] Intermittent engine shut off
> 
> > The car is a 1990 V8Q with ~ 170k miles on the clock, she's getting a bit
> > tired but generally still performs well other than a little puff of smoke
> > after idling at a light.
> 
> Sounds like time for a valve job, good excuse for a port and polish as well 
> ;-)
> 
> > Over the weekend she said it shut down while driving but started back up a
> > half second later 3 times, happened fast enough that she didn't need to 
> > pull
> > over. One time it died at a light but she was able to start it back up
> > immediately. Today after driving 15 miles to her destination, then 
> > 14.9ish
> > on the way back home it died about 4 blocks short of the house. Refused 
> > to
> > start back up. After calling me for help and letting it sit for about 15
> > minutes I had her try again, started and was able to drive the last couple
> > of blocks home.
> 
> More than likely a timing or reference sensor. They are the same as 5000 
> turbo ones, other than the 5000 ones have longer leads. However, they are 
> usually significantly cheaper.
> 
> > Incidental symptom that may or may not be related (probably more to do 
> > with
> > overdue ignition service) is when mildly accelerating the power seems to
> > pulse, like power is applied in a wave rather than a steady acceleration,
> > roughly 1s intervals. Hasn't been enough of an issue to fret about just 
> > yet
> > so I've let it slide.
> 
> Time for a 4-wire O2 sensor. very inexpensive compared to the OEM V8 3-wire, 
> and gives it a dedicated ground. Get one for a 1993 Ford F150 5.0. I also 
> wire in the opposite side plug, so future changes are quick and easy. BTW, 
> your 3-wire relies on the exhaust system for it's ground, probably not such 
> a good reference point after all these years. Cured my V8's surging. Felt 
> like it was accelerating in 50RPM increments to me.
> 
> P.S. Sorry I'm a little late on this one, hopefully it still helps,
> Tony 
> 
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