tejy

iTrader: (1)

Hi all,

Been trying to get my RS turbo started today and its running really lumpy as its been sat for a year and a half.

I have checked the following:

Dizzy cap
Metering head unit
Changed injector seals
Changed the HT leads

The engine is misfiring and I cant figure out how to sort it. I'm getting fuel through all the injector pipes from the metering head, spark is good from 1 - 4.

Is there anything that I might have missed because I have checked the car over and over again and I still can't figure it out.

I'm going to buy a set of brand new spark plugs tomorrow to see if this will sort the problem but if anyone could just give me some advice as to what else the problem could be.

Thanks

mgtkr1

could well be plugs mate. how much boost do you run? ive heard that due to the nature of the fuelling, the higher the boost equals the higher fuel rate required which is obvious. except that mfi means the onboost fuelling been spot on leaves the rest of the range rich. as its all or nothing. theres very little if any scoipe for fuelling both on boost AND mid/partial throttle openings. as a result the plugs have a hard time.
while the spark appears healthy when checking (under no load/compression) it can easily be overlooked. things are alot different under compression and engine loads. its worth checking leads/connectors anda general looksee through the possoible culprits. easy way is to remember the basic rule. an engine needs air/fuel/ignition. if you have fuel and assuming a pigeon isnt living in your airbox then id look at the ignition side of things. a check of the timing may be worthwhile for elimination purposes.

studabear

stuck lifter?

Compression check??

saman

change the plugs mate it was the same probs i was having but wen i changed the spark plugs it was all gd running sweet

tejy

iTrader: (1)

Thanks for the quick reply guys.

The engine is running 15 psi. I literally just checked the timing on the engine just now and it is all spot on everything has been timed up perfectly

I forgot to buy spark plugs today when I went to speedshack so gonna get a new set along with a new fuel filter too tomorrow.

Will be doing a compression test tomorrow too.

Anything else I need to look out for in case none of these things work? I knew I should have gone straight to efi when I did the conversion

*edit*

forgot to mention that I have a recon cylinder head on there so doubt its gonna be stuck lifters.

studabear

efi aint without troubles bud

Adam.

Edited for you mate ....only joking! as said mate try simple things like earths, plugs, fuel pressure, etc first as its normally the simple things

Grandad racer

new plugs, always the ist thing i look at when i have a problem with any of my motors!

tejy

iTrader: (1)

Well I changed the spark plugs today along with the fuel filter but still getting the same thing. Going to change the dizzy cap tomorrow got a spare somewhere need to find it.

This is really pissing me off.. Has anyone got any other ideas as I'm fed up

studabear

drain the petrol off and get some fresh in.

Can you pinpoint which cylinder the mis fire is on?

Chopshop85

iTrader: (4)

when is it misfiring? all the time? on idle?

louie1

either it has worn the bottom off the tappet or its worn the cam lobe away! they will both create a miss fire due to lack of valve lift. pop the cam out and have a look.

tejy

iTrader: (1)

I'm backk .. Its still misfiring on idle and when i rev it

Took the cam out and changed it with a spare I have and I'm still getting the same thing! Its driving me absolutely mental.

I changed the injector seals, there is fuel flowing through all the fuel pipes fine, I found my spare distributor unit and I think its for an S1 as it has a vacuum pipe connection which my current one doesn't have, and the plug is different, so that went out the window

Its misfiring on the cylinder 2 and 3. I have a translucent blue dizzy cap and you can actually see that spark isn't coming from number 2 and 3.

The distributor connector housing is broken so I'm not sure if this is going to make a big difference as it was working fine before? Does anyone have a working distributor unit that I could buy off them? Unless anyone has any more ideas for me?

The lifters were a bit tight but I removed them without too much trouble.

Gonna do a compression test tomorrow need to pick up the tester from my mates house.

Will putting fresh fuel in make a difference at all?

Thanks for the help guys!

Chopshop85

iTrader: (4)

Have you tried changing the coil?
My car had a misfire that I couldn't figure out, it turned out the coil had weakened and even though the spark was visible all across the board it couldn't create a healthy enough spark on the plugs.

tejy

iTrader: (1)

Will i able to just swap the coil from my spare distributor unit chopshop onto the one that I have fitted?

Chopshop85

iTrader: (4)

I don't understand the question.

Could always get yourself one of these.
http://www.ebay.co.uk/itm/Group-Coil...#ht_700wt_1064

tejy

iTrader: (1)

What does a group a coil do?

Ryoishikawa

iTrader: (3)

My s2 did the same thing was the coil . Swapped over for a group a one . Gets the current direct from the battery instead of the old loom. Easy to install. Makes a better spark

GVK.

Did you check the compressions?

tejy

iTrader: (1)

Didnt get a chance to do a compression test today. Think i'm gonna buy a group a coil see if that fixes the misfire. Can I cut the connector from the loom or am I gonna have to get one of these looms? Don't mind forking out for the loom but if I don't need it then there's no point right?

http://www.ebay.co.uk/itm/Ford-Escor...ht_2670wt_1039

Also was looking at wasted spark. What are the benefits of it?

GVK.

Don't rule out the basics before throwing more parts at it, get rid of old fuel, put fresh in.

Check the compressions. You say it's got a recon head, how long ago?

I recently faffed around for a couple of days on a car, all it had was contaminated fuel that kept fouling the plugs. New plugs and fresh petrol, away it went

Other thing is, if you say you have one of those see-through dizzy caps and see no spark on 2/3, have you tried another cap?

GVK.

Wasted Spark - Have a look at RS_Matt's thread 'urgent help' - Stu explains the benifits of WS in there.

You can't have WS on your MFI set up.

tejy

iTrader: (1)

I have tried another dizzy cap, still getting misfire. Will try fresh fuel in the morning. The head had a recon around 3 months ago

Didn't know that you can't run wasted spark on Mfi

Chopshop85

iTrader: (4)

Its just a decent coil. I always try and go for marelli or facet coils as they tend to be better build quality.

I don't know the difference between a wet and dry coil. Just that one takes up less space under the bonnet

gpm89

Without sounding stupid, you say you cant see a spark in the cap for 2 and 3? I would say this means either your rotor arm is fooked or the coil. I dont think anything else would cause no spark in the cap?

phil_rs

iTrader: (3)

How old is your dizzy?

tejy

iTrader: (1)

I have no idea how old it is. I tried to clean up the connections inside the coil and in the rotor arm but still no luck, so what I've just ended up doing is I've brought a group a coil off the msd website so hopefully it'll come by monday, and will update you guys after I fit it!

GVK.

Compressions???

tejy

iTrader: (1)

My mate has lent his compression tester to someone so im gonna have to wait till he gets it back, unless anyone has one i can borrow?

gpm89

Tool station for about Ł20

tejy

iTrader: (1)

im back again with some bad news .. its STILL misfiring

im gonna fucking set my car on fire

The group a coil came today, fitted it with no problems, it was a piece of piss took me 5 mins to change but I just cant figure it out

Still need to do a compression test and put new fuel in but im just fed up with it for now.

Just uploaded a video of the engine running. anyone got any ideas?
http://www.youtube.com/watch?v=UqUHV...ature=youtu.be

gpm89

It sounds like its running on 3. But my escort will idle on 3 where yours sounds like it just dies. You deffo got a spark on all 4? If so id say its got to be a fuellin issue?

gpm89

But id say before you do anything else you need to do a compression check

gpm89

Anyluck with the car yet?

mgtkr1

if you get healthy compression readings, id look at the possibilty been fuel related, assuming your getting spark/timing is correct ect. old fuel can crystalise leading to small drillings/jets or indeed injectors getting gummed up. whip the injectors out or swap some about once youve diagnosed which cylinder isnt firing. bound to be summat simple, especially as its been stood a while. keep us posted tej

Canada1

You may also want to check and verify the spark plug wire firing order.
I have had engines running (very poorly) with 2 wires on the wrong plugs.
Check at the distributor cap for proper firing order.

Cheers

tejy

iTrader: (1)

Finally got round to doing a quick dry compression test. Still need to do a wet compression test but the results are as follows:

1 - 8.5 bar
2 - 7.9 bar
3 - 8.0 bar
4 - 8.0 bar

When I took the spark plugs out, 1 and 2 had black residue, 3 and 4 were brand spanking new (as if I had just put them in and not started the car)

What would be the easiest and least messy way to empty the current fuel out of the tank? Also once the new fuel is in would it be wise to keep the engine running even though its misfiring to just use up all the fuel already in the system to see if the engine stops misfiring and starts running normally?

Canada1

Have you verified the firing order being correct?

tejy

iTrader: (1)

Yes canada1 checked the firing order over a million times with different sets of HT leads, and still nothing

gup

iTrader: (1)

having you tried swapping the injectors over at all, i would just double check your firing order