930 Been sitting a while, steps to revive?

[Orange914-6]

Hey Pelicans,

I have a 930 project I've been spending some evenings with hoping to have her running soon. It was parked about ten years ago and when it was parked fuel was left in tank. I've revived many fuel injected and carbureted cars in my day but I do not have a lot of experience with the 930 turbos or CIS and was hoping for a little advice on what to look out for or extra precautionary steps I should take.

I'm only asking about FUEL system here, obviously oil and filters will all be changed as well.

Here is what I've done so far:

Pulled tank and sent it out for cleaning
Replaced both fuel pumps
Replacing fuel filter in engine compartment
Replacing fuel accumulator
Dropped motor and removed and blew out each fuel hard line with compressed air
Removed and blew out each injector with compressed air to confirm they are not (totally) clogged.
Removed and blew out some of the fuel lines feeding the CIS distributor

My shop now reeks of "barn fuel" but before re-installing engine and attempting to start it, should I do anything else?

Thanks

[sundevil64]

I would clean the fuel head and warm up regulator. If you are going to send it out I can recommend Larry at CIS Flowtech or Brian Bodart. Make sure you blow out the fuel
Lines between the tank and accumulator. Closely inspect the rubber lines.

Also flush your brake fluid.

[Orange914-6]

I should add, I got a little ambitious initially and simply drained the tank and refilled it with a couple of gallons of fresh fuel, cleaned out the tank mounted filter. I had the air filter assembly off, I ran ignition key on and built up some fuel pressure, cranked and the car actually started and ran rough for a few seconds. I tried again this time pushing down slightly on the fuel metering plate and she started and ran a few seconds longer than the first try. I tried again one last time with the same trick but this time noticed the fuel metering plate had a lot of resistance, so I refrained from forcing it down, seconds after the engine mounted fuel filter burst the top right off itself! Seems like I had excessive fuel pressure? This all prompted me to drop engine and have a through look at everything. And here I am!

[RarlyL8]

Flowing new fuel through the old system dissolved some of the deposits which broke loose and immediately blocked the fuel distributor and WUR. Return pressure dead-headed. You'll need to clean the system again and look for weak spots in the rubber lines. The fuel distributor and WUR should be rebuilt, you can try to clean them but will likely keep re-clogging every time you run new fuel through. You don't say what year 930, I may have rebuilt FD/WUR on the shelf.

[Orange914-6]

WUR, Distributor and injectors en route to Larry @ CIS Flowtech!

[patina]

Originally Posted by Orange914-6

WUR, Distributor and injectors en route to Larry @ CIS Flowtech!

GREAT move!

[RarlyL8]

I probably have your rebuilt WUR and FD in stock. Larry does my rebuilds, which are for 911 and 930 only. His business handles all makes and right now he is backed up over a month, if you ever need anything quick give me a call. I'm here every day helping out when I can.

[Orange914-6]

Had engine out for full fuel system rebuild (ran briefly before but decided to replace entire fuel system). Engine back in and excited to crank and run her.......but now I have a no start situation, bah! Seems like problem is no power to coil, I checked and there is no 12v there with key on, can someone help me with some idiot checks? I'd love to get this baby fired up this weekend.

My ground strap is good, nothing really changed since I had the engine out.....

[infraredcalvin]

Check that you have power to the cd unit. On the drivers side of your engine compartment. I forget now, but the workshop manual has a step by step troubleshooting using a multimeter.

[Orange914-6]

I have power going to terminal 15 (red wire) at the CDI connection with key on.

[Orange914-6]

After reading up a bit, i discovered CDI fires coil so the traditional 12V coil check does not apply here .

I gassed up the car and gave her a little carb cleaner down the throttle body, cranked and the car fired and ran for a couple seconds confirming i have fire.

Next question:

I have an all new fuel system: (new gas tank, both pumps, filters, WUR is fresh back from Brian as is Fuel distributor, new injectors, all new copper rings throughout). I went and filled up the tank, turned key on to leak check and discovered a couple minor leaks which I immediately addressed. Now I go to crank and start engine with no luck. I currently have the air filter housing off so on next attempt I pressed lightly on air flow meter and I can hear the fuel flowing through the system, I cranked again and the car started and ran for a few more seconds but then died. I can't seem to get the car to start and run without "priming".....any input appreciated for this rebirth startup.

Thanks

[RarlyL8]

Have you checked the plate height on the air metering plate?
Is the CIS daisy chain getting power?
Will it start and run if you pump or crack the throttle (as if there is no choke)?

[Alan L]

Have you got CIS gauges? Can you check the pressures. Sounds like it is not getting fuel.
You could pull an injector and hook it back to the fuel line and BRIEFLY (1-2 secs) depress the airplate and see if getting fuel at injector.
Do not prolong the test - the other 5 are squirting fuel into your engine.
You would need to pull the plug on back of airplate housing.
Alan

[Orange914-6]

Brian,

Height seems correct according to your included diagram.
The only way I can get it to start is to turn key on, press down on metering plate to introduce fuel, and then, she will run a few seconds (very white exhaust) and then die. I can get it running long enough to run back and hold down metering plate by hand...

What do you mean by CIS daisy chain?
I'm missing my transmission-to-throttle link so I can't apply throttle by foot yet, I should have those parts later today.

[Alan L]

If you are just holding the metering plate down you may be killing it (with fuel). The intake butterfly will still be shut? Any way you can get at the butterfly linkage instead of the airplate? If you open the butterfly the airplate will follow.
Alan

[RarlyL8]

All of the CIS components are on one electrical circuit, the CIS daisy chain. If the chain doesn't have power you don't have a functioning cold start valve, thermol time switch, AAV/AAR, or WUR.
First get your throttle hooked up. Once you have that and can hold the idle manually the problem may be as simple as adjusting the idle screw.

[Orange914-6]

I got the throttle link the car finally and didn't seem to help things. I did however get the car to stay running by holding the CIS metering plate, engine runs smoothly and stays on with metering plate about 10% down.

[RarlyL8]

Need to get some gages on and see what the pressures are. Does the air meter plate move freely? Is there resistance when the pumps are on?

[Alan L]

Weird - because if the butterfly ain't open then you are pouring a lot of fuel in without extra air. Which suggests it may be very lean. In which case the throttle linkage/open butterfly won't help.
As Brian says , next to check is fuel/WUR pressures - and making sure you got no big airleaks - broken/disconnected vac hoses etc.
Alan

[Alan L]

The other thing you could try as a short cut , is wind about half a turn clockwise (richen) the idle mix screw - by the airplate. That effectively sets the fuel piston slightly more open for a given amount of air. the half turn is a guess and depending on result you may want to go further/less
Alan