A 924 Lux technical question for the 924 forum boffins here from member Liz [
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SYMPTOMS
1. One of three things: a. Initially the car will simply "cough" the engine will briefly stall and immediately restart with an audible backfire. b. On other occasions the car will stall completely. The car will neither restart through "rolling" in gear with the ignition on or, having pulled to a halt, nor will it start immediately with the starter motor. The Fuel Pump Relay is found to be very hot to the touch. If the car is left for approximately 5 minutes, the car will restart. c. Finally, having stalled as described above, occasionally, the car will not restart even having been left for a considerable time (60 plus minutes). In these circumstances, the Fuel Pump Relay will be found to have burned out. If the relevant terminal positions of the Fuel Pump Relay are bridged with a spaded wire, the car will immediately start (regardless of how long since the stalling event).
d. On one occasion, the car stalled, and would not restart. The AA was summoned and, having found that the Fuel Pump Relay had burned out, the mechanic bridged the relay terminals with a spaded wire with a 15 Amp fuse rigged in line (as described above). The car started immediately and was driven for approximately 60 miles. The car then stalled once again (typically, after the attendant Patrol Van had departed). The fuse in the wire fitted by the AA had not blown. After approximately 5 minutes of regular trying, the car started. Obviously, in this instance, the Fuel Pump Relay was not the symptomatic point of failure despite the other symptoms being identical.
2. There are no common circumstances when failure occurs. Failure will happen in any gear, at any speed, at any engine loading (including tick-over). Failure has never happened when the engine is cold and tends to happen on trips of more than 30 miles. The frequency of failure is increasing.
ACTION TAKEN
3. My local OPC (Glenvarigill of Glasgow (who have serviced the car for the last 5 years)) has checked out all the wiring. Initially they found a broken earth terminal in the fuse box. The problem re-occurred. The second attempt was to replace the Fuel Pump "" once again the problem has re- occurred. The car is back with Glenvarigill "" who are attempting to find the root cause.
OTHER FACTORS
4. The car is very much a fair weather car and covers only 2,000 miles a year.
5. Whenever the car stalls, the Fuel Pump Relay is found to be hot, to the point of being uncomfortable but not impossible to touch.
6. Possibly related factors: a. When being driven, most particularly over rough road, "chattering" can be heard from the area of the Relay panel (Yet failure leading to a stall most frequently happens on smooth surfaces when the relays are "silent"). b. Occasionally, the car's windscreen wipers will sweep, as if the stalk has been pushed briefly up to request a single sweep.
Liz
SYMPTOMS
1. One of three things: a. Initially the car will simply "cough" the engine will briefly stall and immediately restart with an audible backfire. b. On other occasions the car will stall completely. The car will neither restart through "rolling" in gear with the ignition on or, having pulled to a halt, nor will it start immediately with the starter motor. The Fuel Pump Relay is found to be very hot to the touch. If the car is left for approximately 5 minutes, the car will restart. c. Finally, having stalled as described above, occasionally, the car will not restart even having been left for a considerable time (60 plus minutes). In these circumstances, the Fuel Pump Relay will be found to have burned out. If the relevant terminal positions of the Fuel Pump Relay are bridged with a spaded wire, the car will immediately start (regardless of how long since the stalling event).
d. On one occasion, the car stalled, and would not restart. The AA was summoned and, having found that the Fuel Pump Relay had burned out, the mechanic bridged the relay terminals with a spaded wire with a 15 Amp fuse rigged in line (as described above). The car started immediately and was driven for approximately 60 miles. The car then stalled once again (typically, after the attendant Patrol Van had departed). The fuse in the wire fitted by the AA had not blown. After approximately 5 minutes of regular trying, the car started. Obviously, in this instance, the Fuel Pump Relay was not the symptomatic point of failure despite the other symptoms being identical.
2. There are no common circumstances when failure occurs. Failure will happen in any gear, at any speed, at any engine loading (including tick-over). Failure has never happened when the engine is cold and tends to happen on trips of more than 30 miles. The frequency of failure is increasing.
ACTION TAKEN
3. My local OPC (Glenvarigill of Glasgow (who have serviced the car for the last 5 years)) has checked out all the wiring. Initially they found a broken earth terminal in the fuse box. The problem re-occurred. The second attempt was to replace the Fuel Pump "" once again the problem has re- occurred. The car is back with Glenvarigill "" who are attempting to find the root cause.
OTHER FACTORS
4. The car is very much a fair weather car and covers only 2,000 miles a year.
5. Whenever the car stalls, the Fuel Pump Relay is found to be hot, to the point of being uncomfortable but not impossible to touch.
6. Possibly related factors: a. When being driven, most particularly over rough road, "chattering" can be heard from the area of the Relay panel (Yet failure leading to a stall most frequently happens on smooth surfaces when the relays are "silent"). b. Occasionally, the car's windscreen wipers will sweep, as if the stalk has been pushed briefly up to request a single sweep.
Liz