Discussion
adam quantrill said:
Black smoke under acceleration is a sign of overfuelling.
First thing to check is that the coolant temp sensor is OK when hot - should be around 300 ohms, measure it again at the ECU multiplug to make sure the loom isn't the culprit.
Good call, I will test that tomorrow. There is a temperature sensor in the AFM as well, which needs checking.First thing to check is that the coolant temp sensor is OK when hot - should be around 300 ohms, measure it again at the ECU multiplug to make sure the loom isn't the culprit.
Hi...If it was over-fuelling that bad it would not run at high speed...It would want to die...What is the fuel pressure?...What rating and condition are the plugs in?...Have you got a good fat spark being generated?...If everything else is okay then it could be an ECU problem...The injectors are timed pulses....Wedges are a tad rich on start up and idle but should filter out a bit...Does the smoke smell like raw fuel?..Has the AFM been messed about with?
Eeek lots of question, memory test 101.
Injectors removed and tested independently, all consistent jets but didn't measure flow rate. (Next time).
Fuel pressure 2.5 ish
Air leaks, yes. There are about 4, 3mm holes in the rocker covers. Need to plug them :/
The AFM has been fiddled with, looks like external fuel pump switch. And the lid has been off.
Haven't looked at the ignition much yet, just used the colortune, might go round all eight and check them in the same way.
Have I missed any, probably. New test session tomorrow.
Injectors removed and tested independently, all consistent jets but didn't measure flow rate. (Next time).
Fuel pressure 2.5 ish
Air leaks, yes. There are about 4, 3mm holes in the rocker covers. Need to plug them :/
The AFM has been fiddled with, looks like external fuel pump switch. And the lid has been off.
Haven't looked at the ignition much yet, just used the colortune, might go round all eight and check them in the same way.
Have I missed any, probably. New test session tomorrow.
Chadders75 said:
Eeek lots of question, memory test 101.
Injectors removed and tested independently, all consistent jets but didn't measure flow rate. (Next time).
Fuel pressure 2.5 ish
Thats about right.....Injectors removed and tested independently, all consistent jets but didn't measure flow rate. (Next time).
Fuel pressure 2.5 ish
Chadders75 said:
Air leaks, yes.There are about 4, 3mm holes in the rocker covers. Need to plug them :/
They are probably just the holes for the plug lead clips...They do not go right through...Chadders75 said:
The AFM has been fiddled with, looks like external fuel pump switch. And the lid has been off.
Haven't looked at the ignition much yet, just used the colortune, might go round all eight and check them in the same way.
Have I missed any, probably. New test session tomorrow.
That could be an issue...Although i have just seen the bit about the mis-fire at 2-3000rpm...As Adam said it could be the CTS...Mine was playing up and it was dumping fuel in....Have you tried it with the cold start...9th injector plug removed...This should stop some of the excess fuel...You said a "Blue flame" on tick over...?...Back-fire?....Where this video...Cheers...ZigaHaven't looked at the ignition much yet, just used the colortune, might go round all eight and check them in the same way.
Have I missed any, probably. New test session tomorrow.
Edited by mrzigazaga on Monday 16th May 23:05
Air leaks will tend to make it run lean, but still worthwhile sorting out.
Yes the TPS should be checked after the coolant sensor - a "noisy" TPS can cause extra pulses of fuel.
The flow rate is probably good as you are running rich - you have flow! ;^)
If you can reproduce the sooty exhaust problem with the car sat still and tweaking the throttle open to about 3000 rpm, it will be much easier to diagnose.
Yes the TPS should be checked after the coolant sensor - a "noisy" TPS can cause extra pulses of fuel.
The flow rate is probably good as you are running rich - you have flow! ;^)
If you can reproduce the sooty exhaust problem with the car sat still and tweaking the throttle open to about 3000 rpm, it will be much easier to diagnose.
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