223 replies to this topic

[DaveyC]

Go for it!

 

Only seems to be a problem off boost.

[CHILL Gone DUTCH]

One other thing I did notice from the logs Is your secondary lambda, do you have a CAT as it not behaving like the primary

[DaveyC]

Yeah, I've got a new HJS cat.

 

The secondary has always seemed to do weird things before and after replacing it.

[CHILL Gone DUTCH]

Go for it!   Only seems to be a problem off boost.

By off boost do you mean low load/throttle

[CHILL Gone DUTCH]

Yeah, I've got a new HJS cat.   The secondary has always seemed to do weird things before and after replacing it.

That's ok then As I thought you had removed the CAT

[smiley]

Isn't the secondairy disabled in obdtuner? (afaik see from the log)

 

[DaveyC]

Go for it!   Only seems to be a problem off boost.

By off boost do you mean low load/throttle

Yes, when the MAP is below 100kPa.

[CHILL Gone DUTCH]

give this one a go 

 

 

Attached Files

•  15-08-09 124607 Chill test 2.smp   19.05KB   4 downloads

[DaveyC]

give this one a go 

 

 

 

Thanks, I'll load it up tonight.

 

Out of interest, what elements are you adjusting? (don't have OBD tuner on this PC so can't look at it properly until this evening).

[CHILL Gone DUTCH]

AdJustin's the ignition and transient setTing I've also put you rev limit to 1000 rpm as it helps to settle the cams on Tick over

Edited by CHILL Gone DUTCH, 10 August 2015 - 11:25 AM.

[CHILL Gone DUTCH]

Is it and better Davey

[DaveyC]

Is it and better Davey

Life got in the way again I'm going to have to wait until tomorrow to try it out.

[CHILL Gone DUTCH]

 

Is it and better Davey

Life got in the way again I'm going to have to wait until tomorrow to try it out.

 

 

 

hope it works ok

[DaveyC]

I gave the second map a go. It doesn't seem to be any better, possibly a bit worse. Hard to say really. The stuttering is definitely still there. I took a couple of logs back to back on the same road with the two maps you gave me I can upload these if they'll be useful. Were you able to spot the stuttering in the previous logs at all?

[DaveyC]

Just a random unrelated thought, why does OBD tuner display some of the ignition timings as negative? It also records the units as 'gr'. I assumed this was degrees before TDC, but the 'gr' has me confused as well as the negative units at times.

[CHILL Gone DUTCH]

i did see a blip in the rpms which i assumed was what your taking about 

 

do you have your fuel learn to hand did you get plenty of data in the area that you are having the problem.

 

it is possible to have the fuel learn eml light on whilst you are decreasing rpm which might help you, if you didnt capture this data 

Edited by CHILL Gone DUTCH, 11 August 2015 - 06:34 PM.

[DaveyC]

I don't have a recent one.

 

I can do a new one this evening.

 

What I usually do is just sweep it up and down past the problem rpm range and then just hold it there for a while too until the EML doesn't come on in that area any more. Didn't do anything to alleviate the problem. Wideband shows good AFRs when the car is misbehaving too.

[CHILL Gone DUTCH]

Your AFR was set to 11.4 on your original file from memory and changed it to 11.8 11.4 is very rich All base maps from peter are normally 11.8 Some have run them higher ( leaner mixture )

[smiley]

From your first post "Coil pack - it's had two different coil packs"

 

Can you describe which 2 you used, and where they came from.

(to rule out the knows issue with the china knockoff versions of these that can cause problems)

 

[DaveyC]

That was for under heavy load though, wasn't it?

 

We went off what the wideband was reading and inputted values into OBD tuner until the wideband read what we were after so 11.4 in the table could well have corresponded to 11.8 on the wideband.

 

The stuttering all happens on quite low MAP values where target afr is 14.7. As soon as you get into the load parts of the table where you want richer AFRs the stuttering goes away.