Thread: my D2a TD5 is a pile of dog poo!

No leaks of fuel in tank gas or the bay of the engine ? Are the turbo manifolds well connected and in good condition ? If there is a leak on manifolds, turbo starts to overboosting.

is them compression tests within spec, if it gets 260 and u tested another at 320?? thats alot off difference.

another thing way way out in the air, is your fuel sender reading correct??? and maby its not using fuel your just getting a wrong reading, tho from empty to full how many Ls gose in

You've looked everywhere else, time to look at the auto again - when I had the green RRC with the 4hp22, I experienced shift problems somewhat similar to yours. Turned out the o-ring between the filter and valve housing was split, which allowed air to get into the system. This may have a follow on effect of aerating the oil and reducing the power output of the TC. (Of course I could be wrong - there's only one way to find out.)

I'm waiting to see if disconnecting the MAf brings my economy back... the disco doesnt get used that much now tho.. initial runs indicate improved performance and economy... so will probably get a new MAF... i know yours is new but have you swapped it for a known good one? also what about your egr? is it removed?

You shouldnt be getting overboost at 1.4bar? especially on a d2 with wastgate modulator? something very sus there.. my deefer i have been playing with and i have a bout 10mm of thread showing on the rod and im only just into overboost.. with no modulator...

Is there any signs of leaks anywhere ie fuel pressure reg... where it could be 'disposing' of deisel?

Rough shifting auto as tombie has suggested before could be from the MAF so i would check it again... just to be sure.... even with the MAF disconnected our disco shifts ok... not great but ok..

sounds like your having a hell of a time!

Thanks

Steve

Originally Posted by 5teve

I'm waiting to see if disconnecting the MAf brings my economy back... the disco doesnt get used that much now tho.. initial runs indicate improved performance and economy... so will probably get a new MAF... i know yours is new but have you swapped it for a known good one? also what about your egr? is it removed? ive got 3 OEM mafs and a chineese one, i dont bother with the cheapie as its really stuffs up the auto the other 2, one is deffinatly rooted and the last one is simmilar in performance to the new one. no egr system at all, been missing for a while now.

You shouldnt be getting overboost at 1.4bar? especially on a d2 with wastgate modulator? something very sus there.. my deefer i have been playing with and i have a bout 10mm of thread showing on the rod and im only just into overboost.. with no modulator... 1.4bar = 20.3psi thats about right for fuel cut, my defer ran 24psi with a boost box.

Is there any signs of leaks anywhere ie fuel pressure reg... where it could be 'disposing' of deisel? not a leak to be seen, the pressure reg is new and a new gasket was fitted when the head was replaced, i even have had the fuel cooler apart, cheaked and replaced the o rings.

Rough shifting auto as tombie has suggested before could be from the MAF so i would check it again... just to be sure.... even with the MAF disconnected our disco shifts ok... not great but ok..
i know all about shift probs and the effect mafs have on the auto, unplugging the current new maf makes no differance to shifting, economy or performance, the only differance is the default value kg/hr figure given in the ecu

sounds like your having a hell of a time!

Thanks

Steve

cheers phil

Originally Posted by langy

You've looked everywhere else, time to look at the auto again - when I had the green RRC with the 4hp22, I experienced shift problems somewhat similar to yours. Turned out the o-ring between the filter and valve housing was split, which allowed air to get into the system. This may have a follow on effect of aerating the oil and reducing the power output of the TC. (Of course I could be wrong - there's only one way to find out.)

thanks mark, i knew about this issue, but it would have been addressed when i replaced the filter. the oil sample i took the other day was after the 10min drive home from work, the oil while HOT deffinatly wasnt airated.

cheers phil

You shouldnt be getting overboost at 1.4bar? especially on a d2 with wastgate modulator? something very sus there.. my deefer i have been playing with and i have a bout 10mm of thread showing on the rod and im only just into overboost.. with no modulator... 1.4bar = 20.3psi thats about right for fuel cut, my defer ran 24psi with a boost box.

But a deefer doesnt have a modulator... the disco does.. so you shouldnt be able to get to full boost at all surely? 232kpa sounds familiar for the max you should see on a disco?

Thanks

Steve

Originally Posted by stig0000

is them compression tests within spec, if it gets 260 and u tested another at 320?? thats alot off difference.
no idea? no one knows what it should be or has any documentation to prove the right figure (unless you can dig something up at work?) i spoke to gemini deisel and berrima deisel and both said around 400psi for 19.5:1 static comp ratio. the differance was mine at 260psi was b4 i did the head, ie head had shifted on the broken dowls and the compression was leaking into the next cylinder ON ALL 5 CYLINDERS, the rover mechanic i had look at it to confirm said hed never seen anything like it

another thing way way out in the air, is your fuel sender reading correct??? and maby its not using fuel your just getting a wrong reading, tho from empty to full how many Ls gose in
ive kept a log book from the time i bought the car, i know exactly what the k's are. my 90 with all the fruit averaged 13.3L/100 over 40 000k's and it did twice the work the D2 did, weighed 2.2t had 33's and 200kw...

cheers phil