TURSTY

Hi guys,

Ive had a good look through old posts and found some similar but not quite the same. So here is another one of "those" topics for you.

Here is the story:
I put my old motor (street port with less then 20,000km on it) package with every bolt on incl exhaust, radiator and intercooler, from my S6 into a friends S7.

We used the S7 engine loom and a S7 PFC that has all the settins coppied from my S6 PFC to the new one via Datalogit.

Car started and ran fine for two days, ran exactly how it felt im my old car, nothing out of the ordinary at all.

The new owner drove it round for the two days (not thrashing it as hes rather scared of it still) and it ran fine then one day he parked somewhere, went for a walk, came back and said the car sounded a little funny when it started, but still ran ok. He then drove off and said that it was kind of lagging before it would accelerate. He stoped again and this time it would not start.

He towed the car home and got new plugs. I talked him through de flooding it and it started, reved out fine then he let it idol and it died (10 sec of running).

It now wont start, but reaks of fuel. Hes tried to deflood it again even using ATF but it just wont go.

Im going to lend him a compression gauge to check compression in the next day or two to make sure it hasnt lost a seal, but I dont see why it would have. It came out of my car running MINT with a conservitive tune.

Do these sound like characteristics of a droped seal or just a badly flooded motor?

I'll let you know how the compression test goes, but is there any point in trying to crash start it or de flood it again and give another set of plugs a go?

KFC3S

Try that nulon 'start ya bastard' ether spray.

The other day my S7 wouldnt start, was just cranking over and over like it was flooded. Pulled the IC hose off and got my girlfriend to spray the ether down the intake whilst I cranked it WoT. Took about 10 seconds of cranking and it fired up.

Ottoman

if he's apt enough to pull plugs.. then have him remove the 2 lower plugs from each..

and have him crank the motor.. ask him if he hears 6 even puffs at even intervals...

if he does.. chances are it didn't pop a seal..

check to make sure map sensor is still connected.. no gasket leaks after the TB etc

if it's drowning in fuel.. it's probably the injector settings are incorrect...

is it using the stock 550/850 combo or something bigger?

GoodfellaFD3S

iTrader: (213)

Could be a stuck fuel injector......what is he running?

nimrodroller

Hey guys,

Ive tried pulling all spark plugs out and the EGI and cranking it over and all puffs are even nothing out of the unordanary.

Im pretty sure the injectors are 550 / 850. I think the settings for the injectors would be sweet as its running a pfc which has the same settings as the rx7 the engine came out of (copied the map across).

GoodfellaFD3S

iTrader: (213)

Well, you'll have to make 100% positive that you have the stock 550s in the primaries (they're purplish in color). If you have something else and the Power FC is set for a 550cc then the car won't start.

TURSTY

Its definitly got stock injectors.

The new PFC litterly has every single setting and value coppied and pasted from the S6 PFC so I dont see how tuning can have anything to do with it unless the S6 and S7 PFC respond diffenently to the same settings.

I will try and get up there with my laptop to check for stuck injectors etc and a good MAP reading.

Because the car started with the new plugs and sounded fine Im inclinded to think it could just be flooded. My RX7 has done the same thing and had all the same symptoms.

Compression check will tell us something at least.

GoodfellaFD3S

iTrader: (213)

You've verified that the Power FC map hasn't been reset? I've seen this happen a few times.

TURSTY

Went and had another look at the car today.

My compression gauge still has the hold valve so couldn't get a very accurate reading but both rotors had 3 even pulses all felt very even with the valve held in and both made a little over 90psi with the valve not held in (overall pressure).

ECU had not reset itself - all settings were correct.

We cleaned out the plugs, de flooded it and tried to start it.....still nothing.
Got jumper leads on another car....still nothing
Got some ether.....fired right up!

Now the car starts, runs up the revs, holds for a second, then dies out and needs a lot of gas pedel to keep it reving. It also wont Idol and back fires a little.

Heres some vids to watch.

Car trying to start with out the engine start - (haha note ether doesn't penetrate a air filter)
http://www.youtube.com/watch?v=ClH_J3VEzMM
Car started with ether into the cooler pipe, running like ****! (this was me trying to keep the revs low!)
http://www.youtube.com/watch?v=uP5KrGis_rM

Im going to try and rip this valve out of my compression gauge but its a crappy one thats doesnt look easy.

Log shows nothing out of the norm. Inj Duty is normal, map reading normal, no strange readings at all.

Does this sound like an apex seal? All the rotors Ive seen with lost apex seals seem to rev out really rough and sound reallr bad but this one revs really smooth and sounds no different then it always has....apart from the back fireing.

Clark_rx7

Check your fuel pump and that the filter isnt clogged...You just put a new motor in a car that has been use to running something else. When was the filter las changed. If this engine is more powerful than what the old fuel system was use too, it couldve pulled something to get stuck in an injector even.

nimrodroller

Since owning the car the fuel filter hasn't been changed, so it could be that. Its got a bigger fuel pump in it.

Ottoman

90 psi seems a little low..

but it's not a apex seal..

u have a fuel problem..

did u check to make sure ur fuel lines are connected correctly? there are 3 lines and can be easily confused..

can u hear the fuel pump?

are the injectors clicking and working?

I had a problem on my motor when I first put it in.. it just wouldn't start on its own.. but fired up with carb cleaner.. turned out 1 of the primaries were stuck closed..




u need to start at the back and work your way forward trouble shooting the fuel system..

nimrodroller

Whats should the compresion be roughly?

Fuel lines should be correct as the car worked for 2 days then just died and nothing has been tampered with to do with the fuel. We hooked the laptop up to the PFC using datalogic and and the injectors were reading all sweet. Could it be to do with the fuel filter?

nimrodroller

Ok so after replacing the fuel filter, check the lines under the bonnet, i checked the fuel pump and right there the fuel line between the fuel pump and the cradal metal line was split! see the pictures below.







What would of caused this? any ideas?

TURSTY

Wrong type of hose. **** that was my mistake!

nimrodroller

actully looks alot like coolant hose.... lesson has been learnt on that one! We should ove checked everything!! Will let you guys no once the fuel line as been replaced! Fingers crossed!

GoodfellaFD3S

iTrader: (213)

That'll do it

TURSTY

Haha I went down to the garage last night and there was the piece of injection hose I cut sitting on the bench still. I must have picked up the wrong piece of hose. Thats what weeks of no sleep will do to ya!

nimrodroller

ANNNND BINGO WAS HIS NAME O! It was that fuel line, replaced it and started up first time! It kind of sounds like its miss firing though when I start it up, only lasts about 5 seconds then goes. Any ideas? Its got new spark plugs in