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Mk1 F4R/172'd Track Car Project [Year 3 - Engine and Chassis Rebuild]



F

f0xy

Re: Mk1 172 Hybrid Track Car Project

Yup 'ignition constant feed' or something, checked the earth and power (28 and 29) wires and they both seem fine...

Only thing that was suggested was some of the wire ive used has possibly corroded inside or has a 'dry' spot, as its all been taken from old looms.....this wouldnt be a problem if it was all fresh wire off a reel (which is what im going to try tommorow)....will see what it throws up
 
Daz Clio Cup

Daz Clio Cup

  TVR Cerbera
Re: Mk1 172 Hybrid Track Car Project

The RStuner playing up may be related, my omex can play up sometimes while i'm dealing with other issues!
Get a multimeter on the ecu power at the ecu and see if it disappears while cranking
 
Mark One

Mark One

  ValverInBits
Re: Mk1 172 Hybrid Track Car Project

I've got an LC-1 wideband lambda. loads of people had trouble with them loosing their calibration while cranking due to the starter taking all the current. The solution was to use a capacitor to keep the voltage to the wideband controller.
Could you be having similar problems with your ECU? is the battery over/under sized in terms of CCA it can supply?
 
Daz Clio Cup

Daz Clio Cup

  TVR Cerbera
Re: Mk1 172 Hybrid Track Car Project

i had an lc-1 too and mine suffered with that too, got rid of it! Lol. However mine is running a standard battery, wish i'd known that before!
 
B

BRUN

  Skoda Fabia vRS
Re: Mk1 172 Hybrid Track Car Project

if he is still running the battery from my old car, its an 065 and not underpowered
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

yeah its from your old car, im going to replace all the extensions first and go from there
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

yeah checked all as they were

all thats changed since this started is me moving the ECU, so it has to be wiring related to be honest...im gona try and resolder a few of them in a minute with fresh wire and see if it makes a difference, if not il re-wire the whole lot of extensions to be sure
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

managed to fix my multi meter this morning....so first off was to check the perm and ign lives to the ECU...

the permanent was intermittent, sometimes was 12v+ and sometimes 0.1 odd....maybe a dead wire...so replaced that with some new wire, now 12v at both ends....

the ignition live was 12v+ all the time, but replaced it anyway to be sure. That now has 12v+ at both ends with ignition on, so thats fine. Checked all the earths too, all good.

Plugged ECU in and it fired up fine. Turned off, then back on.....turned on fine again. So left it for 15 mins or so to be sure, started up again no problem. So I *think* it may have been a dodgy wire on the perm live. Either way im going through all the other wires checking the continuity to be 100% sure.

Its just started raining so thats put a stop to that for now!
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

Also a few pictures I just spotted on the renaultsport website from brands hatch :)

_ZZZ2878540x359_Gallery.jpg


_ZZZ3704540x359_Gallery.jpg
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

still got some more to test/replace.....but it could have just been pot luck and decided to start.....shall soon see when I put it back together shortly if it starts again, lol
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

Well it didnt start again, has to be a dodgy wire somewhere now. Replaced about half of them earlier, all tested OK.....suppose il have to replace the other half too and see if it works.

It started fine, then i decided to tape the wiring back up and after that, it wouldnt start....meh!
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

MOT was supposed to be getting done tommorow, obviously not now....hopefully will fix it and get it MOT'd in time for the weekend!
 
geesus69

geesus69

  F4R'd ITB'd '92 cup racer
Re: Mk1 172 Hybrid Track Car Project

it's strange that this problem is exactly what mine was (and might still be) doing

more than coincidence?
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

well upto now ive replaced more wires, had the ecu apart and re-soldered the immobiliser emulator, checked the emu was getting power/earth and outputting, which it is so that has to be OK....

Swapped all the relays in the engine fusebox to no avail...

Just literally taken the loom off completely, going to cut out all the extensions and re-solder it back on as it used to be to see if thats any different.....but im not holding my hopes tbh!

We shall see tommorow when I come to re-fit it...
 
Jay Payne

Jay Payne

  172 Race Car
Re: Mk1 172 Hybrid Track Car Project

So you kept the stock ecu coz standalone was too expensive?

In hindsight you could of used the time you have spent trying to fix it, flipping burgers and bought a standalone with compete loom
 
Jay Payne

Jay Payne

  172 Race Car
Re: Mk1 172 Hybrid Track Car Project

not blaming ecu, just saying that a standalone WITH a fully assembled loom would of prevented about 50pages of this project and F0xy might have some hair left
 
W

Whiteley

  BMW M5 & E36
Re: Mk1 172 Hybrid Track Car Project

Those 50 pages were hardly planned though. Same can be said for some parts of most projects, why didnt you just get X in the first place etc.

Standalone with loom is what, 7/800+? I'm sure if he had that sort of money 'spare' at the time then he might have considered it.

Hindsight is a wonderful thing bla bla!
 
Daz Clio Cup

Daz Clio Cup

  TVR Cerbera
Re: Mk1 172 Hybrid Track Car Project

I agree burp, however i wish i'd never bought the standalone i have atm! lol
Renault ecu is a top bit of kit IF you know who can program it for you, quite sure foxy will get to the bottom of it eventually!
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

firstly....the car WAS working spot on until i decided to move the ecu to the scuttle, ie extending wires....was spot on, only reason I had starting problems is because of the immobiliser being active, as was said

secondly....omex+loom around 800 after the vat, then 300+ to map it....over £1k for something I dont really need yet....maybe in the future though...

TBH if i hadnt messed with the wiring to extend it, it would probably be still working perfectly fine as it was.....but who knows...

Ive just spent the last few hours removing all the extensions, and now the loom is how it was. Will re-fit in the morning and go from there :(
 
A

Aluco

  Titanium 182
Re: Mk1 172 Hybrid Track Car Project

As if you're still on with this mate, lol :D

Looks sweet in your avatar though!
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

Fred said:
dodgy soldering?
Click to expand...

nah! most have been resoldered

also most wires have been multimetered for continuity...all 'seem' fine....will soon tell tommorow now its back how it was when it was working, hopefully itl run!
 
F

f0xy

Re: Mk1 172 Hybrid Track Car Project

just about :)

Removed all the extensions one by one, soldered it back to how it was....what a waste of time that was extending them :(

Anyway turned it over fired up first time...been fine ever since done quite a few miles...

Must have been a dodgy wire!
 
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