Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[AndyStobbs]

Are you sure its can? Looks more like twin k lines or a k and l to me.

[jtypecav]

Should have added.. At the bottom of the image is where it get's weird..

At WOT - and passing the 4K barrier - engine load is 23%?!

Why couldn't it calculate load properly?
Why was anything past 49% of throttle "invalid"
Why did speed pulses appear and dissapear? Pfft.

This is all running on the original manual ecu.
The auto ecu given manual designation gave nearly identical.
Not plotted the auto as auto though!

Kevin - thanks for the offer - if you were the hampshire by Somerset I'd have already been down. But you're a bit further afield.. *goes to google maps* suddenly 1.43 aint too shabby.

I blame the taste of cruise control for the first time!!

[AndyStobbs]

Have you got the original csv file from "My Naff Code Reader"?

[05omegav6]

I've noticed on the how-to section, and on this box here that "5) Remove the electrical connector at the back of the gearbox."

Anyone know what that's for? Was assuming that reverse switch would be in linkage / or gaiter area. If not, apologies for my lack of savvy here.

Rear most sensor is output speed. Gearbox needs that to know when to change gear.

Not on a manual box

Only one wire for the reverse switch

[05omegav6]

Cruise control might be coincidental if the clutch switch wasn't fitted correctly... get the locking tab wrong and the switch fails after a couple of miles. A new switch should cure that issue.

If the ecu is registering a permanent clutch issue then it might be limiting the rpm to protect the clutch/dmf.

By telling the ecu it's in an automatic it ignores the clutch switch, but puts the spanner light on out of confusion...

Fit a new genuine clutch switch and report back

[AndyStobbs]

Have you got the original csv file from "My Naff Code Reader"?

Cheeky edit there by someone. I think "My Naff Code Reader" is one of the best out there for cost vs functionallity, and beleive me, I've spent thousands on diagnostic gear.

[05omegav6]

Have you got the original csv file from "My Naff Code Reader"?

Cheeky edit there by someone. I think "My Naff Code Reader" is one of the best out there for cost vs functionallity, and beleive me, I've spent thousands on diagnostic gear.

If it's the one I think it is, the issue is not for discussion for legal reasons

(Black and white in the forum rules)

[henryd]

Have you got the original csv file from "My Naff Code Reader"?

Cheeky edit there by someone. I think "My Naff Code Reader" is one of the best out there for cost vs functionallity, and beleive me, I've spent thousands on diagnostic gear.

Its an auto "edit" as that equipment can't be discussed here

[AndyStobbs]

Are you sure its can? Looks more like twin k lines or a k and l to me.

Just looked at the wiring diagram again, it is CAN, I stand corrected.

[jtypecav]

Issue was occurring before I fitted the cruise switch (18 months ago, never had one from factory) and it's a genuine one that's been fitted, properly and still passes open/closed test.
Will take a look for the data from last year too.

Since last night I've been thinking. I know it's the injectors being turned off and the only thing that can do that is TC.
On autos the gearbox ecu has to know vehicle speed and everything else is engine related - throttle pedal, engine speed, even cold start so it leads me back to the whole what would be being held back by the lack of autogearbox ecu, or what does an auto ecu not care about that a manual does. I'm guessing it is canbus style (this link anyway!) *edit* just noticed your confirmation of this.

[05omegav6]

Vehicle speed comes from the ABS ecu as an average of all four wheel speeds

[Kevin Wood]

I wonder if there's an issue with the drive-by-wire throttle?

Although I've seen throttle position reported as "invalid" on logs from that code reader before - on a perfectly serviceable car. Throttle position is probably interpreted differently for an auto box, as there's a section of throttle travel for kickdown (in fact - do manual cars have a different pedal position sensor without the kickdown detent?).

I my experience, though, DBW throttle issues result in specific fault codes and a very restricted limp-home (i.e. you get about 1500 RPM - or even just idle!)

[jtypecav]

We changed the pedal assembly last year incase that was faulty due to this - so that part of the FBW system is OK at least.
We changed the butterfly out as well (at the same time as the pedal) and the exact same problem persisted.

Is there another part of the FBW system I've overlooked? Interesting about auto ecu being more care-free about certain data aspects though as that is clearly a symptom here.

[05omegav6]

If the pedal and throttle are from auto cars then that won't help...

That said the throttle body is identical manual/auto... where did the pedal come from

[Kevin Wood]

Plenty of cars have been converted to manual without throttle issues, and I doubt anyone would have changed the pedal position sensor.