jorj7

Mark,

I'll try and swing by also. That way I can make sure Bill doesn't start a 15 hr job on your
car before he helps me pull the interior of my car.

Bill Ball

No prob, George. Yeah, everyone, we're having a car stripping party with George's 928 after we get Mark's running.

Mark87AT

This is awesome!

Tony

I personally dont think that a vacuunm leak will cause the engine not to start. It would have to be a pretty big one id think.

get a jumper wire and jump the EZK, LH and fuel pump relays. pins 30 and 87 on each one. Doing this shows up the bad relay(s).
If you havent already made one..do so. It will save you one day.
http://members.rennlist.com/v1uhoh/jumping.htm

that was ver 1.0 . The one i have now has longer wire and a switch so i can trun the circuit on and off when need be.

Do you have a fuel pressure guage on the rail?
If so, do what i did. Pressurize it with the relay jumpered, then un plug it. Crank and see if rail presure drops.
Repeat 8 times for each injector

Get some test wire and test each plug lead for spark.
Look at your tach when you crank...does it jump? If so your speed sensor should be OK.

Perhaps your idle stabilzer is stuck open?

Try unplugging your MAF?

SharkSkin

Wouldn't the idle stabilizer stuck open be kind of a big *cough* *cough* vacuum leak?

Nicole

Dave: I had a 928 with a sticky idle stabilizer valve, and while it would stall every now and then, it ALEAYS restarted as if nothing had happened.

SharkSkin

I was just teasing Tony there... fact is, with the age of the car it could be a large number of small leaks in old, brittle hoses. It could of course be a number of other things, singly or in combination. Maybe it's a loose coil wire.

sweanders

Have you guys tried replacing the battery yet?

I installed a new battery on my 928 GT that failed within two days, it was a cell that was dead/bad in it.

With a cell gone bad in the battery the car will most likely not start even with starter cables from another car. If the cell is dead it will not start at all.

So my advice from cold Sweden would be to remove the old battery and put another one in there to try it.

I was worrying a lot when this happened to my car and it turned out to be a 10 minute fix.

Mark87AT

Tony, I like the relay jumper switch idea, sounds super useful in these situations I definitely be making one and will likely be checking all of your suggestions.
Sweanders, I think getting a new battery is a good idea anyway, I know for a fact that it has gone a couple of cycles of getting discharged and then sitting that way for a week or so, which may be why it doesn't crank the so well. Actually I was just realizing that since I have had the car it almost never would start on the first crank, but almost always on the second... Didn't think anything of it till just now, perhaps another piece of the puzzle. Mark

Bill Ball

I also doubt that anything short of a huge vacuumn leak will prevent the car from starting. Mark has "jumped" the relays as Tony suggested, and I took out his EZK and LH and tested them in my car.

While I was there the engine turned over feebly while being jumped with his Honda. I suspected the battery was too weak and the jump was not enough. I'm bringing my charger. We may do a battery swap.

George had a couple of good suggestions we will try too.

We need to carefully review things and verify relays and fuses. Then spark, fuel. Mark tested spark and fuel. We will recheck.

My money is still on the battery at this point.

Fastest928

I posted yesterday that we are open on saturdays if you folks need any parts And our suppliers will deliver today!

SharkSkin

That's right, you did mention the battery before... When Mark mentioned the hose disintegrating, it brought back visions of my journey through replacing (almost)all the rubber in the engine compartment. While the car did run at the time, many hoses just disintegrated as soon as I touched them, and I have had the car refuse to start a couple of times with vac leaks(my own fault). I think CIS is more sensitive to this... or so I've read.

Anyway, something came up and I won't be able to make it out there today. Mark, you are in excellent hands with Bill and George. I doubt you could find better assistance on your shark problems in the bay area without going to someone who works on sharks for a living. I'm sure we'll meet up at the TB party or some future event. Until then,

Bill Ball

Marc....got a MAF in stock? :-)

My bet is a short ride to Autozone for a battery..... Mark B., the Autozone branded battery for this car is very good and a bargain. See you at 11.

Mark87AT

Well my shark is back up and running!!!!

I got a new diehard international battery this morning, George had arrived a few minutes prior to my return and Bill shortly thereafter. we put in the battery... no luck. then pulled the MAF and tried, again no beans! pulled the plugs and all were wet and fouled. Cleaned then up and still no go!! it wanted to but just couldn't quite do it. Bill just wouldn't take no for an answer and gave it one last ditch effort.... and it worked!!! ran rough for a little bit and then smoothed out, but the engine was a bit clacky (perhaps sticky valves) I took it for a spin at high rpm and mph and drove up to Georges were he and Bill were removing the rear seats on George's shark in preparation for a roll cage. Helped them with that and now my shark is purring nicely, the clacky noise has dissapeared!

On the agenda for my shark: new vacuum tubing, remove and have injectors cleaned, new valve cover and (maybe) head gaskets, lots of cleaning...

Thanks to everyone for all your great suggestions and help!! Mark

SharkSkin

Awesome! WTG, guys! Sorry I missed out.