Rover 25 keeps juddering and cutting out and losing power
Variant: manual
Model Year: 2002
Categories:
Running Rough, Starting & Power Loss
my husband has got a rover 25 1.4 2002 regd,which we both drive, and its had the spark plugs replaced,petrol filter replaced and the temperature sensor has been replaced but the car still judders and cuts out and when im goin round a left hand bend it cuts out and we have to bump start it,also after the engine has been off for a while it will turn ova but has got no power in it to start and we don't know what is wrong.......please help me try and find a solution, thankyou
Posted: Aug 25, 2011 (13 years ago)
If it's turning over but no power , and needs bump started , get battery and alternator tested .Also check this from another forum ,
Posts 11255
Registered 6/3/04
Location Blantyre Glasgow
posted on 20/4/10 at 08:33 AM
Year 2000 was the change over point from distributor and single coil to 2 coil wasted spark , about 2002 they switched to 2 plug top coil packs.
As above replace the rotor arm or on latter cars coil packs and fit new plugs either X-part or NGK.
NGK number BKR6E or BKR6ES *** very ***important to
check the plugs are gapped at 0.8mm for distributor models. Cars with coil packs used a 1.1mm gap but I recommend the gap is reduced to 0.8mm
However you can also do a few simple checks before spending money.
(1) I think the car will be fitted with a Mems 1.9 or 2.x ecu which has the MAP sensor fitted to the ECU motheboard.
The small bore vacuum pipe between the throttlebody/inlet and the ECU manifold should be **very** carefully removed at both ends and blown through, I would not be surprised if it is full of gunge or liquid.
(2) Re-synch the throttle position sensor to the ECU , by this procedure: with the ignition on but engine not running push the throttle pedal slowly to the floor ten times, then turn ignition off and start the engine.
(3) Check the inlet manifold is tight.
(4) The the earthing point for the MEMS ecu is making good contact with the chassis --- I think on this model the ECU is in front of the battery and the earth point is somewhere on the bonnet landing panel or front ns wing.
(5) Also check the throttle position sensor they can wear badly between idle and 1/4 throttle as this part of the movement gets he most wear.
Posts 11255
Registered 6/3/04
Location Blantyre Glasgow
posted on 20/4/10 at 08:33 AM
Year 2000 was the change over point from distributor and single coil to 2 coil wasted spark , about 2002 they switched to 2 plug top coil packs.
As above replace the rotor arm or on latter cars coil packs and fit new plugs either X-part or NGK.
NGK number BKR6E or BKR6ES *** very ***important to
check the plugs are gapped at 0.8mm for distributor models. Cars with coil packs used a 1.1mm gap but I recommend the gap is reduced to 0.8mm
However you can also do a few simple checks before spending money.
(1) I think the car will be fitted with a Mems 1.9 or 2.x ecu which has the MAP sensor fitted to the ECU motheboard.
The small bore vacuum pipe between the throttlebody/inlet and the ECU manifold should be **very** carefully removed at both ends and blown through, I would not be surprised if it is full of gunge or liquid.
(2) Re-synch the throttle position sensor to the ECU , by this procedure: with the ignition on but engine not running push the throttle pedal slowly to the floor ten times, then turn ignition off and start the engine.
(3) Check the inlet manifold is tight.
(4) The the earthing point for the MEMS ecu is making good contact with the chassis --- I think on this model the ECU is in front of the battery and the earth point is somewhere on the bonnet landing panel or front ns wing.
(5) Also check the throttle position sensor they can wear badly between idle and 1/4 throttle as this part of the movement gets he most wear.
Posted Aug 25, 2011 (13 years ago)
hello thankyou for your help.... but i have bought a coil pack today and it is still juddering and cutting out and not starting after the engines been turned oof for a bit and even replaced the water bottle top, its not the battery and alternator and starting motor all fine. whereabouts in the engine is the small bore vacuum???. i will try and re-synch the throttle position sensor (where is it?) is it the accellorator pedal???. also whereabouts is the throttle position sensor and what does it look like, thankyou for any help
Posted Aug 26, 2011 (13 years ago)
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