993 C2 Big Problem?
Discussion
Help Guys Please!
I think I`ve got a big problem with the 993. Had the car locked up since early December. It was serviced by my OPC on 17/12 and since then it been stood still.
I took the battery out and recharged it. Refitted the battery and she started first time. Let the car reset its system for over 5 minutes and then went out for a run. Started slowly, let the oil warm up to normal and gradually built up the use of the revs. Had a real good blast and redlined it a few times.
Everthing fine, so went for a good run along the M4 and as I was exiting the motorway having finished, I had a small popping backfire and now the car feels and sounds like its running on about 4 pots!
It sounds like a beetle with no exhaust and I just limped it back home (only just) about a mile. It back fires and even stalled once.
Parked up and at the back, the car was hotter than I have ever known(like so hot, I think it might have melted the rear PU on both sides by the silencers) The insides of my tailpipes are now a pale silver-whiteish colour and I am a very unhappy teddy!
Before I get back onto my OPC in the morning, anyone know what I might be facing?
Thanks David
I think I`ve got a big problem with the 993. Had the car locked up since early December. It was serviced by my OPC on 17/12 and since then it been stood still.
I took the battery out and recharged it. Refitted the battery and she started first time. Let the car reset its system for over 5 minutes and then went out for a run. Started slowly, let the oil warm up to normal and gradually built up the use of the revs. Had a real good blast and redlined it a few times.
Everthing fine, so went for a good run along the M4 and as I was exiting the motorway having finished, I had a small popping backfire and now the car feels and sounds like its running on about 4 pots!
It sounds like a beetle with no exhaust and I just limped it back home (only just) about a mile. It back fires and even stalled once.
Parked up and at the back, the car was hotter than I have ever known(like so hot, I think it might have melted the rear PU on both sides by the silencers) The insides of my tailpipes are now a pale silver-whiteish colour and I am a very unhappy teddy!
Before I get back onto my OPC in the morning, anyone know what I might be facing?
Thanks David
Reckon you're right there Melv .....
David, If you want to verify, you'd need to remove both distributor caps, if the belt is broken the secondary rotor will turn freely. If you then disable that circuit, car should run rather better .....
Did OPC do anything in that area?
Cheers, Maurice
David, If you want to verify, you'd need to remove both distributor caps, if the belt is broken the secondary rotor will turn freely. If you then disable that circuit, car should run rather better .....
Did OPC do anything in that area?
Cheers, Maurice
Maurice & Melv
Thanks for your help guys. It`s great to have help on hand like this!
It`s with great trepidation, that I await the morning light. As unfortunatly, I think that my rear PU is a gonner!
My NSR exhaust outlet apperture has melted down and is deformed. And it looks like I have two vertical convex creases that line up with the silencers each side behind the rear wheels...looks really nasty!
I will wait for the cold light of day and report further...many thanks, but with my fingers and toes crossed!
But what damage the internals?
Thanks for your help guys. It`s great to have help on hand like this!
It`s with great trepidation, that I await the morning light. As unfortunatly, I think that my rear PU is a gonner!
My NSR exhaust outlet apperture has melted down and is deformed. And it looks like I have two vertical convex creases that line up with the silencers each side behind the rear wheels...looks really nasty!
I will wait for the cold light of day and report further...many thanks, but with my fingers and toes crossed!
But what damage the internals?
David sorry to hear about your troubles,but having run a 993 on one distributor to see the difference it was just slower and didn't backfire or get any hotter. It certainly could be a broken belt, but i don't understand the intense heat part.
Sorry not to be much help. if you can't resolve it quickly,please drop me a mail off line and i will send you contact details of the guy who looks after my cars.He will know what it is in a heartbeat...hopefully 9M will be along soon.........
Sorry not to be much help. if you can't resolve it quickly,please drop me a mail off line and i will send you contact details of the guy who looks after my cars.He will know what it is in a heartbeat...hopefully 9M will be along soon.........
Possibly an engine ECU fault although the symptoms could result from a number of other things as well. Let the garage have a look in the morning and don`t worry, I bet it`s nothing money won`t fix !
The excess heat has probably been caused by the timing being altered. I am presuming you drove the car after it was serviced, the overheating at the back could have been caused by the rear exhaust boxes not being tightened up properly, that in turn could melt wires around the lamda sensor (although it is protected by a fuse which when blown on a 993 stops the fuel pump / engine so maybe not as likely.
If it`s any consolation my 1923 Delahaye was running a bit rough on the return journey back to base as well !!
Henry
Henry
The excess heat has probably been caused by the timing being altered. I am presuming you drove the car after it was serviced, the overheating at the back could have been caused by the rear exhaust boxes not being tightened up properly, that in turn could melt wires around the lamda sensor (although it is protected by a fuse which when blown on a 993 stops the fuel pump / engine so maybe not as likely.
If it`s any consolation my 1923 Delahaye was running a bit rough on the return journey back to base as well !!
Henry
Henry
clubsport said:
having run a 993 on one distributor to see the difference it was just slower and didn't backfire or get any hotter. ...
Running on one distributor with the other disabled is OK, but in normal mode if the belt breaks and the rotor of the second dizzy is pointing at a cylinder it will be sparking at very odd times with reference to the piston .....
Cheers, Maurice
Following some very sensible and welcome advise. I have decided to ask the OPC in question to collect the car and carry out a diagnostic check and tell me what the problem is.
The car has covered exactly 50 miles since they serviced it, so I think it is best to let them have the first look.
For anyone that is interested I will let you know the outcome. Any further advise or speculation on the potential problem is still greatly appreciated...
Thanks guys!
The car has covered exactly 50 miles since they serviced it, so I think it is best to let them have the first look.
For anyone that is interested I will let you know the outcome. Any further advise or speculation on the potential problem is still greatly appreciated...
Thanks guys!
For anyone interested the 993 is back!
The good news...Got it recovered and taken to the OPC for a diagnostic check. This revealed a problem on the ignition side. Porsche replaced the Final Stage Unit for Distributor 1 and it is cured!
The not so good news...The intense heat generated buy the problem has bu66ered up the rear PU. It has melted the NSR exhaust exit apperture and deformed both lower sides adjacent to the rear silencers. It looks like the only solution is a new one and painting.
Anyone know who is cheapest for a genuine Porsche 993 rear PU at the moment?
The good news...Got it recovered and taken to the OPC for a diagnostic check. This revealed a problem on the ignition side. Porsche replaced the Final Stage Unit for Distributor 1 and it is cured!
The not so good news...The intense heat generated buy the problem has bu66ered up the rear PU. It has melted the NSR exhaust exit apperture and deformed both lower sides adjacent to the rear silencers. It looks like the only solution is a new one and painting.
Anyone know who is cheapest for a genuine Porsche 993 rear PU at the moment?
Hi - Don't know if its too late but I have found that one of the best & most reasonable places to get the plastic bits of my 993 sorted (and they finish paint really well too) is the bodyshop that Adrian Blyth TVR in Surrey sub all their bodywork to. Can't remember their name & the car file is at the office but I know that if you go to the Adrian Blyth website, they have a link. These guys did an invisible repair to my rear PU where some tosser in a 4X4 with Bull bars punched it through and I think the all-in bill for paint & repair was about £400
Hold on a minute - what the hell is a "final stage unit for Distributor 1"??? The dissy cap??
The 993 runs a twin output ignition amp so it cannot be that, unlikely to be the twin coil pack on the engine mount either and from what I remember distributor 1 is the one driven directly from the driveshaft; therefore you are left with a cap and rotor. If they have serviced your car and not checked these items is is close to being negligent, if they have and caused a problem it IS negligent.
I smell the great big rat of an OPC mistake therefore have a go at them to replace the bumper free of charge.
The 993 runs a twin output ignition amp so it cannot be that, unlikely to be the twin coil pack on the engine mount either and from what I remember distributor 1 is the one driven directly from the driveshaft; therefore you are left with a cap and rotor. If they have serviced your car and not checked these items is is close to being negligent, if they have and caused a problem it IS negligent.
I smell the great big rat of an OPC mistake therefore have a go at them to replace the bumper free of charge.
ninemeister said:
Hold on a minute - what the hell is a "final stage unit for Distributor 1"??? The dissy cap??
9M, they list the work as...
DIAGNOSE ENGINE MISFIRE & REPLACE FINAL STAGE UNIT FOR DISTRIBUTOR 1
And they list the replacement part as...
P993.602.706.01 049012/IGNITION SWITCH
Does that help at all?
Gassing Station | Porsche General | Top of Page | What's New | My Stuff