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[TheBoy]

Whilst fresh in my mind...

When he turned up, O2 BLMs:
Integrators, around 100 (low)
Idle (B1 - 190, B2 - 160) (high)
Partial Load, around 130 (good)

Air/fuel ratio (Rich/Lean) seemed sluggish at idle, flipped at about 1Hz at 2000rpm, lazy lamdas, both banks.

Reset BLMs, took for drive, all around the 130 mark, except at idle, when integrators crept to 150ish, with Air/Fuel showing lean until then, then flipped at 0.33 - 1Hz

Seemed slightly down on power to me, although Webby said otherwise. MID readings for instantaneous consumption seemed quite low - I'd expect mid to high 30s average when cruising 50-60mph, reality was mid/high 20s. MID has correct 035 config, and readings seem to match Webby's experience of it using more fuel recently. This leads me to suspect that the engine is really using that amount of fuel, rather than leaks (which I couldn't detect, or smell).

After test run, brakes still cold. EGR can get to about 55% before the thing really splutters. Injector cut-off exactly as expected.

MAF, at idle, with A/C off, 9kg/hr.


Any views/ideas?

[aaronjb]

Exhaust wadding breaking up and strangling the engine? (That's what I'm starting to suspect on mine, but must check the other things too)

[feeutfo]

Was also thinking blocked exhaust. Although I don't understand all that flipping stuff.

Awaits reply from Kevin Wood.

[TheBoy]

Exhaust wadding breaking up and strangling the engine? (That's what I'm starting to suspect on mine, but must check the other things too)

Thats a valid point , although Webby reckons its not down on power.

Any way to check, didn't notice it needing a haircut

[aaronjb]

Any way to check, didn't notice it needing a haircut

Sadly I can't think of one - short of cutting the boxes open or just replacing it on the off chance.. I can imagine it's possible for the centre sections to get bunged up if they lose their wadding and, for whatever reason, it doesn't make it all the way to the back.

Could easily bypass the rear box but not so easily bypass the centres

Could the timing belt have jumped a tooth? I can't remember if it's been done recently or not on that car.

[JamesV6CDX]

Exhaust wadding breaking up and strangling the engine? (That's what I'm starting to suspect on mine, but must check the other things too)

Thats a valid point , although Webby reckons its not down on power.

Any way to check

Cable tie a rubber glove on the tailpipe and start it up. If healthy it should pop the glove after a couple of seconds idling. I've seen them so bad (and not leaking) that the glove hardly inflates!

[Webby the Bear]

thanks very much for the readings and time spent on the car. Its very much appreciated. I have no real understanding of those figures but as we discussed I'll give it a full service with new fuel filter and air filter. Do you reckon if i replaced the o2 sensors that would be the next logical step? Cheers :-)

[Webby the Bear]

sorry James only just seen your post. That certainly sounds like a plan. I presume cable tie it up tight ?

[TheBoy]

Could the timing belt have jumped a tooth? I can't remember if it's been done recently or not on that car.

That crossed my mind as well. I think its nearly due.

[TheBoy]

thanks very much for the readings and time spent on the car. Its very much appreciated. I have no real understanding of those figures but as we discussed I'll give it a full service with new fuel filter and air filter. Do you reckon if i replaced the o2 sensors that would be the next logical step? Cheers :-)

Try JamesV6CDX's suggestion above as a test as well..

[TheBoy]

sorry James only just seen your post. That certainly sounds like a plan. I presume cable tie it up tight ?

No need to cable tie, just hold it on.

[feeutfo]

Remove lambda, fit length of pipe to a pressure gauge through open window to cabin. Need to rig something up.

Although in all cases it blew the pipe off the lambda boss if blocked before a reading cold be taken.

The slightest gas escape will fill  a glove btw. It's a lot if volume.

[JamesV6CDX]

Is it getting up to temperature?

[TheBoy]

Is it getting up to temperature?

Yes - both gauge and ecu CTS

[JamesV6CDX]

Is it getting up to temperature?

Yes - both gauge and ecu CTS