jpitman2

CIS cars need a signal from ignition that engine is turning (pin31), but L-jet cars use the AFM to trigger the pump - which injection is your car?
Both block drains should give fluid - sounds like one is blocked by crud - poke around with a small screwdriver, file end until you get coolant.
jp 83 Euro S AT 57k

grepin

It is a LH jet injection.
I am thinking the relay is not getting the signal to energize.
The jumper between 30 and 87 does work however.

jpitman2

AFAIK LH only requires a stock '53' relay - try putting the horn relay in there.
jp 83 Euro S AT 57k

grepin

OK. Will do.
I was just reading how the LH ECU is meant to send a signal to the fuel relay to energize it.

grepin

When I look at this the horn and the fuel pump relay have different part numbers. Hence why I got what I did.
When I got the car it had no relay in place so I cant go by what was in there.
Is your 83 the same as the 84 I wonder. Mine is a late 83 but has the LH and the 4 speed so basically an 84.
Just wondering if our CE panels are the same.

https://www.928gt.com/default1.htm

DeWolf

Pull the trans relay out and try and start it then. It may be the wrong relay.

grepin

So I had a quick play around.
Removing the Auto start relay didnt let the car turn over at all.
I put the horn relay in and it worked. It did need to crank it a bit so I am not sure if it is priming before turning over.
The car starts quicker with the jumper switch in.
However when I look at this relay chart the 83-84 Euro the horn and the fuel pump relay have different part numbers.
What part number do I need then? What gives the fuel pump that initial prime function? Is it the relay?
But all good progress I was thinking I may need to have the LH ECU overhauled.
83-84 Relays
Position
Description
Part#
I-II
Rear Defroster
928.615.115.00
III
US/Not used -Euro/Window WInder
141.951.253.B
IV
Alarm (US 84 Only)
141.951.253.B
V
Indicator(turn) Flasher
1H0.953.227
VI
Window Winder
928.615.116.00
VII
Headlamp Washers
928.618.111.00
VIII
Not Used

IX
Kick-Down Relay - Auto
928.618.109.00
IX
Kick-Down BRIDGE - 5-Speed
928.615.125.01
X
Twin-Tone Horns
141.951.253.B
XI
Not Used

XII
Foglights
928.615.117.02
XIII
Intermittent Wiper Delay
993.615.101.00
XIV
Start-Relay (auto)
141.951.253.B
XIV
Start-Bridge (manual)
928.612.473.00
XV
Intensive Washers
928.618.113.01
XVI
Fuel Injection
928.615.119.00
XVII
Fuel Pump
928.615.113.01
XVIII
A/C Condensor Fan
141.951.253.B
XIX-XX
Combination Headlight
928.618.107.02
XXI
Fresh Air (HVAC) Blower
141.951.253.B
XXII
Defroster
141.951.253.B

soontobered84

Greg,
The 84 Euro uses some different relays than the US 84. One of them is the fuel pump relay. The 84 Euro uses a standard 53 relay. The US model uses the relay number that you have posted. Change your fuel pump relay for a standard 53 relay and you will be on the right track.

grepin

Thanks for the confirmation.
Looks like I got confused by the US version.
Its been hard to find a good diagram of a Euro 84 CE relay and fuse panel.

grepin

Noticed a leak from looks like the fuel tank strainer. I didnt put it on very tight from the start. I nipped it up a little more and the leak got worse.
Maybe the O ring has been pinched. Think I need to pull it out to check.
I went from an in tank pump to a strainer set up.

jpitman2

The strainer should have a flat rubber gasket under it - at least thats what mine has. An Oring to me has a round section......
jp 83 Euro S AT 57k

grepin

Yeah it is flat.

grepin

I am pretty happy in my insignificant 928 world.
I drove around the block today.
I stopped the tank strainer leak by doing it up some more, to 22 NM torque.
The car ran with a normal 53 relay in the fuel pump spot.
Oil pressure started at 5 and dropped to around 3 when warm.
My aircon is not cold (no real surprises).
No great amounts of smoke or anything blowing.
Seems to run ok considering the MAF is saoked in oil, the spark plug that I did see looked average and the injectors are in unknown state.
Next is to pull the inlet side down check injectors, maybe send off the MAF and new plugs.
Fix whatever is leaking into the V (waterbridge etc) maybe an oil baffle to stop the blow bye into the intake (opinions please).
However need to do some house repairs first. That was the Porsche deal from the wife. Get it to running stage then house work.

And Scott if your reading this there are some tele dials for sale in Adelaide on Gumtree.

jpitman2

Good work! Oil pressure is normal - pegged >5 cold, dropping to 2-3bar hot, same as mine. Check every water hose for cracks, replace as needed. Check hose clips for tight. If sump is oily, check all sump bolts , but note that they should only be 7-8 ft/lbs torque - more will squash the gasket out and leak more. I put star washers on my bolts, helps to keep them done up. Replace the plugs with spec Bosch copper, not fancy modern stuff.
jp 83 Euro S AT 57k CIS

DeWolf

Congrats. That's the hard part done. Getting it running. Now start by replacing stuff. Again mate, if you need a hand let me know.

Those tele's are only 15". My 79 is a manual so 16" was standard. On another note, just sold the 86 5.0 manual. Going to restore the 79 back to better than factory. Unfortunately had to be realistic and can't juggle work / business, family and two resto's.
I think once the 79 is done I want to build an LS3 Boxster S.