Technical > Engine and Transmission

Injector airlocks, 100% convinced... Bleeding fuel rail... :-)

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NealPeal:
Hello! :-)
I've had a load of luck this year getting 2 cars to run properly, and now I'm 99.9% convinced I know what fixed them...

I've hardly started mine since it ran out of petrol last time but it had trouble getting to 4k this morning and lumpy idle again. The smell of unburned petrol in the air..

Before I did it I said to my Dad, "I bet bleeding the fuel rail fixes it" just for fun... 2 Minutes later it was lovely and back under lambda control and that load of clean water came out the exhaust, just like Matt's seemed to just at the same time as we checked the fuel pressure on his last week...

I recon the dizzy-end injector had a bit of either bubble or muck making it far too lean - making unused oxygen go through the outlet meaning the o2 sensor thinks it needs more fuel in, piling it in causing the over-fueling… Without running it out of petrol and some test-kit I'll probably not know until next time...

Presumably it'll bleed itself at full power at 4k, mine won't ever get to being a driveway-toy!!!

Do newer ECU measure each cylinder's CO cycle, or even know which is 1 vs 4 is being fired, do they fire individually? Do wideband sensors pick up that sort of single cylinder change?

So many questions, I'd love to meet the blokes who managed to fit the engine in the space it's in let alone wire it up!

NEAL:-)

matthg40:
Bleeding the rail certainly helped matters I agree.
And now we seem to be on top of the timing that’s helping too.ive noticed the knock sensors are a problem on these mine keep getting to hot and crumbling I’ve been through 4 in a year and obviously they play a major role in the running of the engine.so I need to find a way of stopping them from getting so hot and breaking down.
As we said they are 25 year old classics so they are never going to be problem free so we learn new things about them each day you’ve ceryainly taught me a few things and I’m hoping that vcds software will also aid me in keeping ontop of things too in future

NealPeal:
Just that oil pressure light to sort out and I'll call it quits until the respay is done..
the barrier coat has just come for the roof so i bet that'll be done today.. you wanna see the fresh sprayed bonnet not even been flatted is shiny.
Glad of my dad, he is curator of the shell!
Museum piece one day.!
Cup tea anytime? Gotta look at your other chip when we get a mo...
Cool matey, wahey, two workin cars between us in 6 months, not bad eh!

matthg40:
Ah I’ll find you that sender sorry mate.
I will come and check out your spraying may get you to help you cover all my Tesco do is up in the future.ill be over when mines running I’ve got the vcds software on and it works so I’m going to give it a try tomorrow so I’ll give you a call with the results.shame the weather has lost the plot not really spraying weather at the minute sadly

steveo3002:
intresting , never hear of anyone bleeding em

what results do you get on the gauge , ive just had one delivered

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