Renault Clio 1.2 16v 2004 D7F - Missfire to No1 CylinderArchived Message
Posted by Peter Warman on January 11, 2008, 7:38 pm
Hi All
Renault ClioII 2004 1.2 16v Man 20,400 miles
This has the coil pack and leads all i one
This one came in this afternoon with a misfire and MIL on
Checked with Modis and gave me a code for Misfire to Cylinder 1 (gearbox end). I checked and changed the plugs but still the same. I scoped primaries at coil and both ramping ok. Changed coil pack and leads but still misfiring. I lifted the lead on No1 and getting a good spark, but the misfire does seem to be confined to No1, refitted another plug (just in case) but still the same
I then scoped the injector on No1 (suspect one) and No4 (good one) as i can only access these two when running, the resistance on both was 15 ohms and the scope pattern for the injectors also the same, live data shows around 5ms at idle. I took No1 plug out again and it did look a little damp as if not firing
So could an injector be fault although it seems to be in spec?
I have not checked for any air leaks yet or compression test, just putting some feelers out if someone has had one with a 1 cylinder misfire. I had a read through the archives but nothing jumps out
I did also check for chaffing of the wires at rear on top of ECU
I still have the car so can do some more checks Monday.