Valver help

[Chris_C]

Is the idle control valve still plumped into a separate filter to the main throttle body on that car?

[magnumpi]

Hi again Theo, sorry for off topicing your topic, but i've had no txt from you as of yet.

So can you PM me your number and we can get this sorted, cheers.

[Speedy88]

Is the idle control valve still plumped into a separate filter to the main throttle body on that car?

Yep, will be. He needs to sort the temp sensor first though, I'd be more inclined to think that was effecting the idle more.

[Chris_C]

They'd both affect it dude, I'd forgotten the air temp wasn't reading too.

[theo2468]

Shall I just get a new loom off Adam? Didn't you say you've already changed the sensor speedy?

[Speedy88]

Yes, but just getting a new loom is an expensive solution. I mean it's one sensor...

Chris could you take a look at the test data for Theo and see if there was anything else wrong with the sensors?

I'd take a look at it first and see if there is something loose on the plug and trace back the 2 wires, see where that gets you. Test it with a multimeter

[Chris_C]

I'm still not claiming expert on this stuff, but my take is a new loom isn't worth it.

Whenever the saloon was round mine and we were fixing it the only thing I noticed that I didn't like was the IAC valve was on a separate filter. Mine was originally like that and a tame mechanic showed me the amount of difference it makes (the orig system makes use of the low pressure created by the throttle body a lot of the time, to make it all more stable). Added to that at this years 300 national I hooked up my diagnostic stuff and laptop and let Speedy drive round so I could gather data to compare it with Fake, as I know some stuff isn't right on both to try I could do the "what the hell is different" game later. Certainly the air temp sender was not reading at all, so that's the only wire I'd not trust. As Speedy says, multimeter is best for that, chase it out.

I'll go through the logs, but if you've plugged/unplugged stuff it's likely to have changed a lot. How good are you with electronics if I told you how to build a diagnostic thingummy Theo? It's about £30 in total from memory, might be a bit more. With the logs from that, there is a lot of cross valver sorting we can do.

[theo2468]

My electrics arnt to bad but my dads are top notch, so I'm sure between us we could do it.
My main problem is I don't have a clue about this engine, I don't know to much on them. But I really want to know my way around it and I'm sure I'm going to need to

[Chris_C]

My main problem is I don't have a clue about this engine, I don't know to much on them. But I really want to know my way around it and I'm sure I'm going to need to

I don't know many people who do... very little of the information I've found from forums or talking to people has turned out to be anything more than a round in circles game of them not quite understanding it either hence why the real time logging got involved

Chet looks to have run out of FTDI cables atm, so you'll need to source that separately (that's not a big issue, RS etc sell them). Your car has a 1/4" spade connector on the diag port, so you'll be connecting to that as well as a gnd in the car ( I use the heated seat plug as it's roughly in the right place and has more 1/4" spades). There is a +ve from somewhere, but I can't remember if that's laptop side or car side without looking at the schematic.

http://www.retro-renault.com/forums/car ... roductid=3 Is a kit with all the bits you need other than the FTDI cable, spades and wire. There is a schematic about in the internets that shows you how to make one without the kit, but it'll cost you more to get the parts and won't be as nice as a custom PCB. I use that cable with TunerPro software, I struggle with the XR25PC stuff and to my mind the real time view and logging is much better with TP.

[theo2468]

the car is now idling alot better, but when you rev it at first it splutters and then clears as the revs pic up, making pulling away very difficult.
was it always like this speedy? i just want to make it abit more drivable to sell it as i have been made redundant :/
otherwise ill just have to sell it like this.
cheers theo

[jon-ovlov]

checked the leads? mine did that, one of the ht leads had corroded.

[Speedy88]

No dude, it was always good. Just had the sensor issue Hmm, what fuel map is it running? Did you swap the standard map back in?