I've a really annoying problem with my cosworth powered mk2 Escort it's standard apart from stage 1 castle chip starts 1st time But has a really bad misfire ,so bad it hurts your eyes until it warms up I've searched the posts and tried just about everything out there?
Its has 55psi in rail at tickover which Increases to 65 when reg is disconnected and co is3.0% at idle when warm ,Tryed the usual plugs and closing the gaps , it's had a full set of sensors from Brands hatch,swopped the map sensor,all the Ht changed inc grpA coil ,I've even changed the ecu but still the same
I've not done anything with the injectors as of yet but I'm running out of ideas the trouble is it goes really well once it's warm but does smoke a bit when the throttle is blipped which says to me it's still too rich above idle ?
Im wondering if I've been really unlucky and have 2 duff ECT sensors
Any ideas most welcome Cheers Paul

 

Fuel pressure is a bit high for a stage 1 which normally uses the standard pressure.
Standard fuel pressure is 50 psi (3,5 bar) with regulator disconnected.

Check with castle what fuel pressure you should use.
Or try a standard chip at this pressure and then the standard pressure.

N.B.: Even with this fuel pressure you should not get misfires due to over fueling.
If it's only with the castle chip then I would recommend to find another supplier.

 

Thanks for reply ,
The pressure was 45psi at idle so I bought a new pump and prefilter as my old 044 pump was noisy ! it increased the pressure but the faults still there.
I've tried another ecu with a unknown stage one chip but again no different.
I don't have a standard chip to try unfortunately so I cant say for sure. ive not adjusted the regulator and it still has the factory seal but mine does seem to be high if it should be 50 disconnected and mines 60psi.
Thanks again for the input cheers Paul

 

I get slated (by one person) for saying it so often but I would go aftermarket ECU with new loom and get Mark Shead to map it live, you will be amazed by the difference and it will run like a new, modern car.

 

Its got a brand new loom and I've a couple of ECU,s so that's not really a option Yet lol

 

Sell the old stuff, it still gets decent money or convert your loom. I went coil on plug too as that also modernises it.

 

it may be worth changing your fpr,just to make sure its not leaking fuel into the inlet

 

Check you have the right tps for the ecu you are using and loom configuration for the tps /ecu combination you have

 

The small vacuum pipe from fpr to inlet is totally dry but I will check again thanks

 

Ahh id not thought of that???? You mean 4x4 configuration and 2wd
Will check my diagrams
Thanks much appreciated

 

Yep pf09 l8 and p8 4wd
pf01 l1 and l6 2wd
Check the tps is wired to suit the above combination

www.bigturbo.co.uk

 

You sir are a legend top and bottom pins were wrong way round for my 2wd swopped them over and bingo
I owe you a beer or 2 mate

 

In all honesty as you’ve tried a lot of things already I’d book it in with a decent tuner, tell them what you’ve looked at and I’m sure they’ll get to the problem pretty quick.

You already have a new loom which is excellent news and expensive so no point really selling your old management (which sounds in good condition ) just to fix a misfire which could be something cheap and simple...

No need to entertain a 4K management swap at this stage imo,
The rich with money to burn may think it’s an option though...

Hope you get it sorted, keep us posted

Cheers Paul

 

There not all 4K and some can work out cheaper than buying closed loop and wasted spark and L8 etc

 

I fixed it for him over the net for free see post 12

 

I think mine was under £1800

 

He has a minor issue and you want to bung a new ecu loom and sensors in to resolve.

 

Just see that dude, top job.

Something as simple as that eh, I guess he won’t need that new management system now then that others were recommending lol

Cheers Paul

 

With mapping?

Still £1800 to fix a misfire is a bit much for most people

Cheers Paul

 

Lol

Glad someone sees it the Same as me ha ha

Cheers Paul

 

I know that but if you wanted mark to fit emtron or vipec and map it it’s gonna be around that figure, ask him if you don’t believe me.

The op may even have wasted spark and closed loop

Cheers Paul

 

We did not know it was a simple issue before it was resolved. Of course I would not swap a full loom and ecu to cure a mis-fire BUT, my philosophy is that if something needs to be changed on my car I buy something new and ideally improved. IF it had been something like a corroded loom or failed ECU component then YES, I would chuck brand new and modern stuff on it. I would always look for a benefit in anything I had to change on the car.

 

No one knew what it was (except Tony who is a professional tuner) but it’s best to start with the more simple stuff like Tony diagnosed and I mentioned it could be, thankfully it was simple.

If you read back your first comment you literally say ‘I’d go aftermarket ecu with a new loom‘

So I’m afraid your wrong...

And again that’s your car your talking about so you would change it all for a misfire, your words not mine.
This post isn’t about ‘your car’....

Cheers Paul

 

Cheers Paul

 

Yawn! This thread is not about you or me....or your constant trolling of anything I post. Do you wake up in the morning and look for posts by me?

My post that you so kindly re-posted just in case I cannot remember or read my own posts started "I Would" which means "this is what I would do"...I wrote that as that is..... What I would do.

If I bought any Cossie today...It would still be the first thing I would do.

 

Me and Trev...lol...and yes I am taking the piss out of myself.

 

Yawn yawn, same old comments on any YB thread regardless of what the original poster actually asks, it makes me laugh as much as it bores me though, I get bored seeing the same old replies again and again, then I laugh thinking you’d actually change the whole management system on a car because you have a misfire lol

Cheers Paul

 

I don't actually believe that changing the management is necessarily an "upgrade".

I was surprised to learn recently that one of the 'modern' ECU's SM4 (I think) does not support sequential injection.

The standard Weber management was formula 1 technology of the day that Keith had fitted to one of his cars.

Martin

 

 

Isn't the SM4 the same as vipec? That does do sequential injection. You are right though, you need the mapper / installer to know what they are doing and what they want to acheive to spec the right one, clearly a megasquirt would not compare.

TurboTrev look away as I am talking about my car and personal experiences and opinions and I know you hate that...DO NOT READ ON.

The main "upgrades" I wanted were 1) everything new as I was fed up with chasing misfires and the car ran differently each time I drove it, I know someone like MSD could have probably sorted this but they were SOOOO far away from me that the cost of getting the car there and back was a big proportion of the replacement cost (plus cost of things like loom etc)

2) I no longer wanted a car running on a distributor...things have moved on with coil on plug...I had an MG metro with a distributor and I was glad to see the back of that!

I wanted to end up with cam shaft trigger and delete the dizzy altogether

3) I wanted it live mapped, I was recommended to Mark Shead as a guru and someone quite local to me who could rolling road close to my house AND live map it and he no longer maps the old stuff.

4) My car had been chipped and mapped before and was far from perfect so did not want to throw good money after bad, I wanted to fix and forget.

The Vipec also talks directly to my Toucan dash with tell tales

 

I think it is SOME of the Webber stuff that was formula 1 spec...is it not something like the L6 with Pectel board that could do launch, closed loop, high and low boost switch and anti lag...I am not sure all of them do it but I could be wrong.

 

For someone like myself coming from an L6, original loom, green injectors, distributor ect I was originally going to go L8, new loom, wasted spark, closed loop, Siemens blacks, anti lag ect ect and I added it up to be nearly 2.5k which I thought was bonkers on an old ecu and second hand injectors ect.

Decided a simtek would best fit my needs, can be supplied fitted and mapped local to me and works out £2300 with new wrc loom and coil on plug. With this I can add sensors for low fuel and oil pressure to stop my engine grenading where as the Weber would happily allow that. Also I like the idea of drive by wire throttle, it takes over as the idle control valve, when using anti lag it opens the throttle rather than having to file away at the ISCV and also auto blips on downshift.

Each to their own, im starting from a basic spec car so makes sense to me. You’ll notice the amount of L8 ecus forsale recently where the owners are going aftermarket

 

Good point, I forgot about the sensors, Mark has talked about a few of those things and we have agreed to add cooling fan control and maybe drive by wire to the roller barrel inlet, it is nice to be able to upgrade as you go (viper needs an add on for drive by wire) so he prefers emtron now.

 

Until you drive one or map one lol.
The Sm4 is not considered modern now as design over 10years old and does most definitely does do sequential injection.
The Webber l1 to p8 is definitely not modern now and definitely very old hat. Of coarse it will start and run a YB quite well today it can’t possibly match a modern Ecu of today.

Mark

 

It was obviously another manufacturer then (or maybe another Autronic model?), but I remember thinking it was strange.

Martin

 

Come on Toby “thank” Mark on some more of his posts ha ha.
Tell us more about your car again incase we missed the last 500 indentical posts you put up lol

Cheers Paul

 

Might want to check your shoulder for a big chip.

4.00 a.m. post

 

You do know this is a CAR forum where we talk about our cars don’t you? I am not going to talk to you here about my toaster?

On your daily stalking why don’t you look at my last 100 posts and then your last 100, compare how much I help people, do people favours and promote people who do good work for me and then compare if you have done anything constructive for the forum, said nice things etc....I expect you can add it to your spreadsheet or wall poster about my posts.

 

What injectors will be used with your new Simtek ecu? The £2300 cost did'nt include them I presume.
I have the first set up you were considering, wasted spark driver fitted into my L8 ecu by MSD. I am pleased with how hard the car goes but it would be interesting to drive a 2wd Saff with the latest set up to compare it.

 

Do you use the Siemens injectors on yours?