Mongo

I blew up an LH? Please don't say that. This is the second LH in this car. I was sitting at a stop light when it happened also. Not other things on in the car, not even the damned radar detector.


EDIT: I should also mention in response to cleaning grounds that everything was cleaned in the back of the motor when I did my intake service in 9/2008. Literally, every ground is clean, even behind the dash to the gauge cluster.

Tony

thats how my first LH went. Drove to the grocery store, all was good. I came out side to start the car and before it even cranked there was a bunch of clicking under the hood....injectors firing. My first 928 and my first LH faliure.

Anyone know of another reason the injectors will fire like this??


This lady is pretty good from what i understand...

Mongo

Lovely...


What does it take to cure a streak of bad luck besides rain dances?

danglerb

$$$$ or Maybe you should take Bill Ball up on dropping by for some diagnostic time.

John Speake

I does sound like that LH has died, especially if it is injectors clicking, and not something else in the engine compartment. Use the Screwdriver stethoscope trick to localise where the clicking it coming from.

Unless your plug leads are in a very bad state then I doubt your car is killing LH ECUs. I am sure you haven't been jump starting or charging the battery either....

ew928

Can alternator voltage spike(s) (from wonky voltage regulator) nuke an LH?

John Speake

Hi Ernest, yes, it is possible. there's a list of no-no's on page D 24/28-3 in Vol 1A of the WSM.

I guess an observant owner would notice a charging issue.

But I guess that Andy has unfortunately become an innocent victim of lightning striking twice.

Courtshark

That would simply be remarkable. Obviously NOT saying it's impossible to be the answer, but this would be an explanation of last resort for me on this one. I agree that an alternator/voltage regulator problem might be to blame; was the battery charge level needle bouncing? No matter how good your grounds are, a faulty alternator or related component can wreak havoc on our sensitive electricals. Smoking two LHs in short order is just plain odd.

Courtshark

oooh and that was post 666 for me. Jus' sayin'

John Speake

Looks like post 668 to me...... jury's out on the LH failure......

AO

Do we know if the LH in question has ever been rebuilt? Seems to me if it hasn't, that it is the most likely cause.

Mongo

Andrew's right. The LH I'm borrowing is a used unit not rebuilt. It was sitting in the garage at the time of the swap. My alternator was replaced after I bought the car in 2001. I've never had voltage problems and I have not jump started my car ever with this other LH in it. The old one I did once or twice back in 2001 before the car was diagnosed with a bad alternator.

On a side note, I have always had idle problems on this car since day one of buying it. It wasn't really driven much until this year as a daily driver, hence we never really diagnosed what was originally causing the issue. The old one definitely was causing idle issues that's for sure now.

Plug leads are new John; looks like lightning has struck in the same place. Again, swapping my old LH in with the bad idle circuit stopped the injector clicking when the ignition was on. When I started it the car ran poor at idle. The plugs were fouled because the engine was flooded with fuel.

John Speake

Fair enough. You just have been incredibly unlucky. One suggestion for long term "shelf storage" of an LH ECU is to push some aluminium foil between the two rows of pins of the 35way connector before putting it to rest.

Recently a local car had the engine pulled. When the engine went back and a first start attempted, it was found the LH had died, just sitting there in the car, disconnected. (engine was pulled in the normal way, with the engine harness)

S4ordie

Mongo - You brought this upon yourself. This is what happens when an outspoken Reagan Conservative moves into the bastion of Liberal thought. This is the only explanantion that makes sense. The odds of having two bad LH's in such a short time is astronomical.

You've got the bad "Carma" of one million Prius owners draped over you and your shark. The only recourse is to either move to the O.C. or put on your best hemp shirt and buy a life size carboard cutout of Gavin Newsome and bow done before it repenting of your conservative ways.

Just sayin it couldn't hurt. Depends upon what's more important, ideology or the world's greatest Supercar

Mongo

Guess my luck transferred from women and dating to cars after 3 years.