Discussion
Restored a D reg 924S during last year and managed a couple of shows with it during last season.
Not concours but I'm pleased with it and that's what counts eh?
Recently it just stopped whilst parking it up and now won't restart.... Yes, there is petrol there!
Fires whilst on the key but runs for only a second or so when the key is released.
Changed the DME relay (and tried shunting it) cleaned connections etc., but no go. There's fuel at the rail but no petrol smell from engine bay or exhaust.
Now I'm stumped! Any ideas welcome.
Not concours but I'm pleased with it and that's what counts eh?
Recently it just stopped whilst parking it up and now won't restart.... Yes, there is petrol there!
Fires whilst on the key but runs for only a second or so when the key is released.
Changed the DME relay (and tried shunting it) cleaned connections etc., but no go. There's fuel at the rail but no petrol smell from engine bay or exhaust.
Now I'm stumped! Any ideas welcome.
Thanks all, at least something to try! Andy, yes, shunting the power/pump terminals with DME relay removed produces pump noise and a flow of fuel at the fuel rail joint.
I like the sensor idea and I'm wondering if there might be an ignition switch issue allowing ign power in the start position but not when the key is released.
I like the sensor idea and I'm wondering if there might be an ignition switch issue allowing ign power in the start position but not when the key is released.
Another attempt and I'd say progress but still no go.
Established that there's fuel supply from pump to the rail and the pump runs fine. Rev counter doesn't bounce whilst cranking but does register as it fires and attempts to run. cleaned all the connectors I could find and there was some corrosion here and there. The news is that with air box open and fuel introduced to the intake it will run!
Seems to me that we've isolated that the problem lies with the injectors not getting a signal to open so one of the sensors does seem like the right track.
Thanks again one and all.
Established that there's fuel supply from pump to the rail and the pump runs fine. Rev counter doesn't bounce whilst cranking but does register as it fires and attempts to run. cleaned all the connectors I could find and there was some corrosion here and there. The news is that with air box open and fuel introduced to the intake it will run!
Seems to me that we've isolated that the problem lies with the injectors not getting a signal to open so one of the sensors does seem like the right track.
Thanks again one and all.
rev counter bounce is good though isn't it as it shows the speed sensor is registering.
Whilst you have fuel to the rail it might be insufficient pressure to the injector. How old is the fuel filter and have you ever cleaned/replaced the strainer on the fuel pump?
Is a 924s stil on Kjet/KEet?? Ive only familiar with standard 924models, mk1/2 golfs an such like that run Kjet. On those kjet cars a blocked strainer or failing intank pump puts more load on the main fuel pump which tends to lead to blown fuel relays, ECU relays and general non starting issues.
Whilst you have fuel to the rail it might be insufficient pressure to the injector. How old is the fuel filter and have you ever cleaned/replaced the strainer on the fuel pump?
Is a 924s stil on Kjet/KEet?? Ive only familiar with standard 924models, mk1/2 golfs an such like that run Kjet. On those kjet cars a blocked strainer or failing intank pump puts more load on the main fuel pump which tends to lead to blown fuel relays, ECU relays and general non starting issues.
Yes indeed. Despite our best efforts at tinkering the car was eventually trailered around to Chris' workshop.
Impressive little place and a very knowledgeable bloke. Fault diagnosed in no time and the car now runs better than ever. Thanks Chris!
Plan is to do some local shows with it this season.
Impressive little place and a very knowledgeable bloke. Fault diagnosed in no time and the car now runs better than ever. Thanks Chris!
Plan is to do some local shows with it this season.
This ^^^^ .Plus I haven't seen a before and after independent test of the speed density setups yet. It wouldn't be hard to improve on a car running a knackered AFM etc and claim wonders. I probably would have taken a punt on VEMS if the guy selling the plug and play kit didn't throw a moody when I asked him to clarify a couple of points.
52classic said:
Another attempt and I'd say progress but still no go.
Established that there's fuel supply from pump to the rail and the pump runs fine. Rev counter doesn't bounce whilst cranking but does register as it fires and attempts to run. cleaned all the connectors I could find and there was some corrosion here and there. The news is that with air box open and fuel introduced to the intake it will run!
Seems to me that we've isolated that the problem lies with the injectors not getting a signal to open so one of the sensors does seem like the right track.
Thanks again one and all.
Could be ignition switch as well.Established that there's fuel supply from pump to the rail and the pump runs fine. Rev counter doesn't bounce whilst cranking but does register as it fires and attempts to run. cleaned all the connectors I could find and there was some corrosion here and there. The news is that with air box open and fuel introduced to the intake it will run!
Seems to me that we've isolated that the problem lies with the injectors not getting a signal to open so one of the sensors does seem like the right track.
Thanks again one and all.
It could well be related to an alarm system that is currently installed or previously installed.
Both of my 2 S's had issues caused by previous alarms.
One had had two systems fitted and the other had possibly 4 , all sorts of s
te plugged in and lots of wire taps and dual connectors. ECU fried on one of them due to it
Both of my 2 S's had issues caused by previous alarms.
One had had two systems fitted and the other had possibly 4 , all sorts of s
te plugged in and lots of wire taps and dual connectors. ECU fried on one of them due to itGassing Station | Front Engined Porsches | Top of Page | What's New | My Stuff