Hi, I have seen a lot about this issue and I now have some ideas. But the posts I have read have not covered all of the symptoms that we have.
Our symptoms are (in chronological order)
1998 Renault Clio Grandee Mk 2 1.2. with approx 80,000 miles on her.
Engine turns but will not fire
Left car 5 mins then it started first time
Sprayed Ht leads with WD40
Ran ok in regular daily use for 1 week then;
Same problem occured with same solution.
Replaced Plugs and HT leads.
Ran ok in daily use for 1 week then;
Engine would not turn over. Hissing noise heard from area of
pack when key was turned.
Towed car home tried bump starting on route (Nothing doing) abandonned car & went to pub! Went to car following morning started first time.
Ran ok in daily use for 1 week, then;
Started ok but idling at 3000 rpm.
Went for a drive awkward in traffic, but ok on mortorway, after 50 miles the coolant sensor came on so we stopped. (it was still idling at 3000 rpm) All levels ok, I disconnected the battery to see if i could reset something & then we started it & it ran perfectly. Maybye very slightly uneven at low revs but hardly noticeable. Continued to London and back 275 miles absolutely no probs.
Can anyone give me a steer?
Forgot to mention, we had it plugged into a diagnostic the day after we towed it home, but no faults showed up.