Hi guys been having weird backfire and misfire problems for a while now

Stripped the loom off the car gonna clean it up and do some checks.

Had a little look all ready and there is an earth/ground which goes to the coil packs looked really rough. Anyone reckon this may be cause of problem.

 

It's weird cause can remove each injector/coil 1by1 and rev it to 2000rpm in neutral and get a backfire.

Only does it once warmed up.

Seems it's on all 6cylinders. Running standard psi and ecu

 

Also pulled the plenum and noticed it has a lot of oil around the edges.

Is this normal. The egr that connects either side of plenum near throttles were really oily so removed egr and blocked holes.

 

Poor car is in a thousand bits again gotta stop getting bored lol.

 

Anything else use guys would look at while stripped.

 

Any advice appreciated.

 

The new website looks good but feels weird got use to old one.

unplug your o2 sensors ... see what happens

 

sounds like the same problem i had .. didnt do it when it was could just when hot ..

one of my sensors had shorted out and was making the ecu do silly things ( missfire )

Hi mate done that already. Did ya tell me to do it a while back, someone did lol.

Will check the part of the loom where the o2's plug into.

 

Thank u 4 your reply

Hi mate done that already. Did ya tell me to do it a while back, someone did lol.

Will check the part of the loom where the o2's plug into.

 

Thank u 4 your reply

it may have been ... thought this was another one ...

 

the only other problem that u may not of checked is the Fuel Pressure Reg ... if its not working right this will give the injectors Less fuel pressure and

give missfire symptom

it may have been ... thought this was another one ...

 

the only other problem that u may not of checked is the Fuel Pressure Reg ... if its not working right this will give the injectors Less fuel pressure and

give missfire symptom

 

Got a spare one when I put plenum back on I will try it. Thank you.

 

Cheers. For your help.