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Author Topic: 3.2 still a little unhappy  (Read 12689 times)

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Jimbob

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Re: 3.2 still a little unhappy
« Reply #150 on: 12 April 2011, 15:40:31 »
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Jimbob

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Re: 3.2 still a little unhappy
« Reply #151 on: 12 April 2011, 15:41:24 »
hmmmm tps may be a red herring, similar results on my data....
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JamesV6CDX

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Re: 3.2 still a little unhappy
« Reply #152 on: 12 April 2011, 15:43:36 »
Cheers JB.

I note your throttle position is "invalid" on some occasions too - and that your knock control is "active" quite a lot

Can anyone else see any significant difference between these logs and mine?  :-/
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albitz

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Re: 3.2 still a little unhappy
« Reply #153 on: 12 April 2011, 15:44:21 »
Quote
Yes, Albs, is yours in good nick, on your breaker, if so, shall I send you another cheque?  ;D
[/highlight]

Its OK James, I will just add a couple of zeros on the end of the one you sent me this morning. :y ;D
If you just want the plug with some loom attached, its F.O.C. ;)
« Last Edit: 12 April 2011, 15:45:39 by albitz »
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Jimbob

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Re: 3.2 still a little unhappy
« Reply #154 on: 12 April 2011, 15:45:45 »
in fact VERY similar results in some areas......
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JamesV6CDX

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Re: 3.2 still a little unhappy
« Reply #155 on: 12 April 2011, 15:56:52 »
Quote
in fact VERY similar results in some areas......

My 3.2, used to feel so pokey that I had to watch I didn't blip the throttle a fraction over bumps, else I'd shoot off like a rocket!

It now feels like someone's stolen it, and replaced it with a 2.2  :'(
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Kevin Wood

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Re: 3.2 still a little unhappy
« Reply #156 on: 12 April 2011, 16:32:00 »
I've turned my eyes inside out trying to spot the differences. ;D

Looks to me like the TPS situation and the knock retard are the same on both cars.

Jimbobs is clearly kicking out more power, though. Pick a spot vehicle speed at 100% throttle and compare the two cars. Notice the "Vehicle acceleration" column.  :o Also, RPM is higher by a couple of hundred RPM in each case. Assuming gearing is the same, (we don't know that it is!) I think this means much more torque through the sludge pump.

At times James' car is using less injector duration and the MAF output is lower. Either the MAF sensor is telling it porkies or it really is drawing in less air (crushed intake duct? throttle not really fully open?).

Sometimes there's a difference in ignition timing but I'm not convinced that isn't because of the difference in apparent engine load. :-/

I've got a headache now, so I'd better stop poring over logs. ;D

Oh, and I hate Excel. >:(

Kevin
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albitz

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Re: 3.2 still a little unhappy
« Reply #157 on: 12 April 2011, 17:05:59 »
Crushed air intake or something along those lines sounds feasible imo, as does a blocked exhaust.
If the engine cant suck in enough air, or push the exhaust gasses out, it aint going to produce the power it should. :-/
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Entwood

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Re: 3.2 still a little unhappy
« Reply #158 on: 12 April 2011, 19:40:59 »
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I've turned my eyes inside out trying to spot the differences. ;D

Looks to me like the TPS situation and the knock retard are the same on both cars.

Jimbobs is clearly kicking out more power, though. Pick a spot vehicle speed at 100% throttle and compare the two cars. Notice the "Vehicle acceleration" column.  :o Also, RPM is higher by a couple of hundred RPM in each case. Assuming gearing is the same, (we don't know that it is!) I think this means much more torque through the sludge pump.

At times James' car is using less injector duration and the MAF output is lower. Either the MAF sensor is telling it porkies or it really is drawing in less air (crushed intake duct? throttle not really fully open?).

Sometimes there's a difference in ignition timing but I'm not convinced that isn't because of the difference in apparent engine load. :-/

I've got a headache now, so I'd better stop poring over logs. ;D

Oh, and I hate Excel. >:(

Kevin

Is the gearbox faulty ??? Problem with the TC (if auto) / Clutch (if manual) ??? Engine actually OK but the power is not getting to the wheels ???

James says it "feels" sluggish .. if it revs freely under no load, and the problem is under load .. again .. possibly a gearbox issue ??

:(
« Last Edit: 12 April 2011, 19:42:11 by entwood »
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henryd

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Re: 3.2 still a little unhappy
« Reply #159 on: 12 April 2011, 21:11:39 »
You could be on to something there ,I am sure that James has mentioned that the gearbox is on it's way out :y
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JamesV6CDX

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Re: 3.2 still a little unhappy
« Reply #160 on: 12 April 2011, 21:11:42 »
Update

I put a cable tie around the DBW multiplug (the one that doesn't 'click' home)

It did seem to 'pull in' a little.

Went for a drive tonight and I don't know what to make.

It's not quite the beast it was when I bought her, but I'm convinced it's now more responsive.

When booting from standing start / crawl, the 'TC' light sometimes flashes now, stopping it from letting the rear wheels spinning - I don't recall it doing that, after the stat change.

Also when clogging it from 30mph, over 4000 RPM, it really takes off.

On the way home from work, Sophie said to me words to the effect of "whatever you've done, it hasn't felt this quick apart from the day you bought it"

Have I made a difference? am I imagining it?

It's still definitely not like it was when I bought her, but am convinced it's at least a bit better  :-/

Another live data log perhaps to look at acceleration / speed against throttle position  :-/




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JamesV6CDX

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Re: 3.2 still a little unhappy
« Reply #161 on: 12 April 2011, 21:12:32 »
Oh, and I may also be totally imagining this, but I reckon the gearchanges felt better too, since the cable tie.

Again, it may just be in my head  :-/
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Jimbob

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Re: 3.2 still a little unhappy
« Reply #162 on: 13 April 2011, 07:59:25 »
well that sounds like progress, yes be interesting to see the 'after' log

would also be interested in another 3.2 auto produced "My Naff Code Reader" log, just in case we both have an issue, with different severitys.


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JamesV6CDX

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Re: 3.2 still a little unhappy
« Reply #163 on: 13 April 2011, 10:21:55 »
would blocked plenum breathers cause a noticible performance loss?
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TheBoy

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Re: 3.2 still a little unhappy
« Reply #164 on: 13 April 2011, 19:24:49 »
Quote
well that sounds like progress, yes be interesting to see the 'after' log

would also be interested in another 3.2 auto produced "My Naff Code Reader" log, just in case we both have an issue, with different severitys.


You want me to burn perfectly good petrol (suspect LPG would not help the confusiion) :o

Can't do it until the weekend now though...
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