[Diy_efi] Bosch L-Jetronic Trouble

Adam Wade espresso_doppio at yahoo.com
Thu Oct 31 02:35:55 GMT 2002


--- Mike Sharp <Mike_Sharp at pacbell.net> wrote:

> Someone suggested checking for a spark after the car
> died.  Any hints on  how to do this would be
> appreciated since the coil is controlled by the 
> computer.

You do it like you do with any other vehicle.  The
point is to see if the issue is spark-related or
fuel-related, and regardless of what controls the
spark timing, you want to see if there's a spark or
not when you turn the car over, nothing else.

> Since the car runs normally for ~15 seconds
> (drivable, etc) its not the rotor/cap/wires/plugs.

So you turn the key off, turn it back on, and it
starts right back up?  Or you have to leave it?  Or
what?

One way to test spark while the car is cranking but
not running would be to use a digital tach on an auto
multimeter, which would let you watch spark signal
while sitting in the car.

I concur that testing the fuel pump/regulator (via
watching fuel pressure in the rail) is a good place to
check after eliminating spark.

=====
| Adam Wade                       1990 Kwak Zephyr 550 (Daphne) |
|   http://y42.photos.yahoo.com/bc/espresso_doppio/lst?.dir=/   |
| "It was like an emergency ward after a great catastrophe; it  |
|   didn't matter what race or class the victims belonged to.   |
|  They were all given the same miracle drug, which was coffee. |
|   The catastrophe in this case, of course, was that the sun   |
|     had come up again."                    -Kurt Vonnegut     |

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