We have a 2002 disco 2 TD5 auto and it has a real low power problem.
It's had a TD5 Inside remap and was making good power but then it's just lost it all and has no guts.
There's no black (or other) smoke at all.
I think it's either lack of fuel or lack of boost or a combination of the two or lack of boost because of lack of fuel or something.
Using a nanocom we're seeing a peak "Air Flow" of about 550 gr/hr (we have the data if required).
We have another Disco 2 (this one a manual) that has the same (similar ish) map from TD5 inside (and does have some black smoke). This makes about 680 gr/hr on full boost.
We swapped parts from the 2nd Disco for testing. After swapping parts we test drove both cars. Neither car changed performance or Air Flow figures.
We've tried the following:
Checked air intake for blockages
Replaced air filter for new
Swapped actuator - from working disco
Swapped MAP, MAF and AIF (airbox sensor) - from working disco
Replaced depression control valve
Fuel pump replaced for VDO
Checked HP fuel pump draw (~24.3 mV across F10)
Replaced FPR and cleaned gauze
Changed Fuel filter housing and filter (as it was leaking)
Injectors' seals replaced
Checked crank position sensor and swapped out for a spare one
Replaced the crank position wiring (left old loom in place, which was cracked and in bad condition).
We also tried disconnecting the MAF, the MAP and the AIF independently and none of these made any difference. Disconnecting both the MAF and AIF reduced the power even further to the point it would hardly drive.
We even removed the boost hose from the wastegate actuator as a last ditch effort to force it to make too much boost but it just sat at ~550 on the Air Flow.
The turbo seems to have very little end float if any but we are just about to swap it out for a new Chinesium one in the hope it might be a sticky wastegate or something - will report back...
Any other ideas of what to try would be very welcome...
It's had a TD5 Inside remap and was making good power but then it's just lost it all and has no guts.
There's no black (or other) smoke at all.
I think it's either lack of fuel or lack of boost or a combination of the two or lack of boost because of lack of fuel or something.
Using a nanocom we're seeing a peak "Air Flow" of about 550 gr/hr (we have the data if required).
We have another Disco 2 (this one a manual) that has the same (similar ish) map from TD5 inside (and does have some black smoke). This makes about 680 gr/hr on full boost.
We swapped parts from the 2nd Disco for testing. After swapping parts we test drove both cars. Neither car changed performance or Air Flow figures.
We've tried the following:
Checked air intake for blockages
Replaced air filter for new
Swapped actuator - from working disco
Swapped MAP, MAF and AIF (airbox sensor) - from working disco
Replaced depression control valve
Fuel pump replaced for VDO
Checked HP fuel pump draw (~24.3 mV across F10)
Replaced FPR and cleaned gauze
Changed Fuel filter housing and filter (as it was leaking)
Injectors' seals replaced
Checked crank position sensor and swapped out for a spare one
Replaced the crank position wiring (left old loom in place, which was cracked and in bad condition).
We also tried disconnecting the MAF, the MAP and the AIF independently and none of these made any difference. Disconnecting both the MAF and AIF reduced the power even further to the point it would hardly drive.
We even removed the boost hose from the wastegate actuator as a last ditch effort to force it to make too much boost but it just sat at ~550 on the Air Flow.
The turbo seems to have very little end float if any but we are just about to swap it out for a new Chinesium one in the hope it might be a sticky wastegate or something - will report back...
Any other ideas of what to try would be very welcome...
