TD5 Smoke screen

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Originally Posted by discowhite

s
you loose pressure whilst retaining the fuel delivery hence the smoke.

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OK - my knowledge of the td5 is not that good but even the most basic EMS for a turbo with electronic fuel management has fuel volume delivery compensation for air intake pressure & temp etc.

I'm sure that the td5 EMS ECU would have all of that otherwise it just wouldn't work.

I'd think that the only scenario where the EMS would not be able be able to cope/compensate is in the final injector tip fuel delivery/spray pattern.
Something as basic and prehistoric as air pressure input would have to be accounted for.

TD5

AAP sensor at Airbox
MAF after airbox
IAP at inlet manifold

Scenario is boost coming up, fuel delivery rises
AAP + MAF read increased consumption of air
IAP reads increasing pressure at manifold

Hose delamination expands, rapidly blocking flow to IC

IAP pressure drops rapidly
AAP + MAF still reading high

Large burst of fuel then fuel cut off as boost drops
MAF reading drops
Fuelling drops

Delamination bubble deflates

Flow returns, boost increases, fuel increases...

Blockage returns.....

More smoke!

Repeats as long as your holding down the throttle!!!!

Thanks Tombie

I'm glad someone else 'knows' about the bubble delam issue and not assumes that a delam results in a burst duct!

My td5 didn't have this repeat scenario but instead the EMS detected the total air blockage and shut the whole thing down.

I had to lock it, immobilise it and then unlock, restart and keep repeating until it worked. Eventually had to remove battery connection and do a 'full reboot' - until I discovered the issue and did the internal duct reinforcement repair.

so where in any of my posts did i mention that

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delam results in a burst duct!

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none... maybe you should listen to whoever said this

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Sorry, I assumed that you read the above posts fully

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youve taken my comments way out of context, so dismount and get on with your life.
ive manned up and said i got the wording of your post confused so whats the issue.


cheers phil

im off to buy some fully sick hectic new pipes for my turbo, mean wile my td5 chews on its cigar. thanks for the tips boys. ;)