Clio 1.2 16v 2001
Hope you fellas can help me out, i'm up a certain creek without a paddle 
i've got a 1.2 16v clio, 2001 and a few months back, it started developing a bit of what I thought was a flat spot at about 3k rpm, but it got worse and worse, eventually, under heavy acceleration, the car would be really hesitant at 3k, 4k and 5k rpm, but seemed a bit smoother inbetween...
the other day I was checking everything over and couldnt find anything obvious, but it was driving OK, so decided to go put petrol in it ( morrisons, standard unleaded ) and on the way home, the car started boucing revs at just under 4.5k rpm as if it had hit the limiter, and the car then refused to rev, or accelerate, a second later it kicked back in, then 30 seconds later done it again... i managed to struggle 1/2 mile home and left the car idling, it then stalled...
it's done this twice before, both times the car has been sitting idling and has just stalled and struggled to restart for a few minutes..
now... the car starts, and runs fine from cold until the engine warms up, i've checked via OBD and the sensors show the coolant rising quickly to 83 / 84'c before it stalls, if you leave it to cool, it starts fine... right before it stalls, it shows the short term fuel trim drop to -100% meaning it's cutting the fuel, and the o2 sensors reflect this by showing 0.0000v which is understandable - but why is the ecu imposing a 100% fuel trim ?
if you start the engine when it's warm, it will only run for about 30 - 60 seconds then stall... if you try to turn the engine over, it cranks, starts up then immediately dies...
now for what i've tried...
I've tried a new coil pack - made no difference
I've swapped the upstream and downstream o2 sensors - made no difference
checked all connections i can access and appear ok
changed the plugs twice over the past month and a bit to see if it helps...
done an oil change
tried reseting the ecu by disconnecting and leaving it for a while
checked the battery - healthy voltage
checked the vacuum to the brake servo - fine
checked the vacuum to the charcoal filter - fine
checked the fuel pump for dirt - fine
checked the fuel is pumping when the engine is cranked - yep
other bits and bobs, can't remember
a few queries -
would the coolant temperature sensor have anything to do with it ? or is the coolant pump perhaps seized / failing, how could I tell ?
on the D4F engine, is there a fuel filter, my haynes manual stated somewhere there is no filter as there is no return line
is there and EGR valve on the petrol engines ? I can find references to them causing similar issues, but only on the dCi engines ? if so, is there a similar part or cause in the petrols ?
i'm really desperate to get the car back on the road, there is nothing done engine wise except a backbox and piperx induction kit
i've got a 1.2 16v clio, 2001 and a few months back, it started developing a bit of what I thought was a flat spot at about 3k rpm, but it got worse and worse, eventually, under heavy acceleration, the car would be really hesitant at 3k, 4k and 5k rpm, but seemed a bit smoother inbetween...
the other day I was checking everything over and couldnt find anything obvious, but it was driving OK, so decided to go put petrol in it ( morrisons, standard unleaded ) and on the way home, the car started boucing revs at just under 4.5k rpm as if it had hit the limiter, and the car then refused to rev, or accelerate, a second later it kicked back in, then 30 seconds later done it again... i managed to struggle 1/2 mile home and left the car idling, it then stalled...
it's done this twice before, both times the car has been sitting idling and has just stalled and struggled to restart for a few minutes..
now... the car starts, and runs fine from cold until the engine warms up, i've checked via OBD and the sensors show the coolant rising quickly to 83 / 84'c before it stalls, if you leave it to cool, it starts fine... right before it stalls, it shows the short term fuel trim drop to -100% meaning it's cutting the fuel, and the o2 sensors reflect this by showing 0.0000v which is understandable - but why is the ecu imposing a 100% fuel trim ?
if you start the engine when it's warm, it will only run for about 30 - 60 seconds then stall... if you try to turn the engine over, it cranks, starts up then immediately dies...
now for what i've tried...
I've tried a new coil pack - made no difference
I've swapped the upstream and downstream o2 sensors - made no difference
checked all connections i can access and appear ok
changed the plugs twice over the past month and a bit to see if it helps...
done an oil change
tried reseting the ecu by disconnecting and leaving it for a while
checked the battery - healthy voltage
checked the vacuum to the brake servo - fine
checked the vacuum to the charcoal filter - fine
checked the fuel pump for dirt - fine
checked the fuel is pumping when the engine is cranked - yep
other bits and bobs, can't remember
a few queries -
would the coolant temperature sensor have anything to do with it ? or is the coolant pump perhaps seized / failing, how could I tell ?
on the D4F engine, is there a fuel filter, my haynes manual stated somewhere there is no filter as there is no return line
is there and EGR valve on the petrol engines ? I can find references to them causing similar issues, but only on the dCi engines ? if so, is there a similar part or cause in the petrols ?
i'm really desperate to get the car back on the road, there is nothing done engine wise except a backbox and piperx induction kit
