NIcad7
EG6
- Joined
- Nov 19, 2011
- Messages
- 359
OK, before we start, I have searched the **** out of this, on this forum, google, everywhere.
I've found a few threads where people have had similar symptoms and checked their fixes but to no avail in my case.
So, at my last race at Cadwell I had second in the bag then a missfire began to develope and I had to retire.
Started at 8k rpm, then 7k, then 6k.... until it is now so bad it is completely missing on idle. So clearly something has gradually broken down.
Now one possible cause could be that the gearbox earth had a dodgy connection and was noticed to be almost arcing against the chassis... It's obviously been fixed now but could this have killed something, if so what?
So things that I have already replaced/checked;
Compression - all even and good
Timing checked
Sparks - Replaced
Leads - Replaced
Ignition Coil - Replaced
Dizzy Cap and Rotor - Replaced
ECU Chip - Replaced
I've got no CEL, sometimes it sounds like it's has a little backfire 'pop' just before it starts up then just rough idles.
Seems to me like it's getting too much fuel but I don't know. I've looked at the injectors they are all firing fuel but I don't know if they are dumping in too much. The plugs look ok when I pull them out, maybe slightly sooty.
I have also fitted thermal intake gaskets but would have thought if there was a vaccum leak like that it would high idle?
I'm going to try another standard ECU (Mine is a chipped P28) and also a complete known working dizzy asx mine is 170k miles old.
Just wanted to hear other suggestions that are a little more informative than the usual suggestions that I have already found?
Thanks
I've found a few threads where people have had similar symptoms and checked their fixes but to no avail in my case.
So, at my last race at Cadwell I had second in the bag then a missfire began to develope and I had to retire.
Started at 8k rpm, then 7k, then 6k.... until it is now so bad it is completely missing on idle. So clearly something has gradually broken down.
Now one possible cause could be that the gearbox earth had a dodgy connection and was noticed to be almost arcing against the chassis... It's obviously been fixed now but could this have killed something, if so what?
So things that I have already replaced/checked;
Compression - all even and good
Timing checked
Sparks - Replaced
Leads - Replaced
Ignition Coil - Replaced
Dizzy Cap and Rotor - Replaced
ECU Chip - Replaced
I've got no CEL, sometimes it sounds like it's has a little backfire 'pop' just before it starts up then just rough idles.
Seems to me like it's getting too much fuel but I don't know. I've looked at the injectors they are all firing fuel but I don't know if they are dumping in too much. The plugs look ok when I pull them out, maybe slightly sooty.
I have also fitted thermal intake gaskets but would have thought if there was a vaccum leak like that it would high idle?
I'm going to try another standard ECU (Mine is a chipped P28) and also a complete known working dizzy asx mine is 170k miles old.
Just wanted to hear other suggestions that are a little more informative than the usual suggestions that I have already found?
Thanks